IDIOM VARIATION IN BUSINESS ENGLISH TEXTBOOKS: A CORPUS-BASED STUDY

This paper deals with the variation of idioms from sport which are used to talk about competition in business, e.g. a level playing field. In business English textbooks they are listed in one form, whereas corpus data show that they occur in two or more lexical and/or syntactic forms. Furthermore, it has been shown that alterations result in a change in the overall meaning of the idiom and that different variation types serve specific functions. In order to explore the variability of idioms included in business English textbooks, we conducted two corpus studies of ten competition idioms. The aim is to show that competition idioms vary lexically and syntactically, and that there may be considerable differences between the textbook form and those in which the idioms occur in the corpora. In addition, we will give a cognitive linguistic account of how different variation types affect the idiomatic meaning and what functions they fulfil. The findings may have implications for teaching figurative language in ESP given that (1) idiom variation presents a challenge to non-native users of English, (2) idioms are frequently creatively exploited in discourse, and (3) idioms are used not only to convey information but also evaluation.


INTRODUCTION
Figurative expressions, including idioms, are an important research topic in ESP, especially in business English since business discourse (both written and oral) abounds in figurative language (Boers, 1999;Charteris-Black & Ennis, 2001;Handford, 2010;Herrera-Soler & White, 2012;White, 2003).As a result, idioms have become an integral part of some business English textbooks, e.g.Management and Marketing (MacKenzie, 1997) and the textbooks in the Market Leader and Business Advantage series.For example, MacKenzie's Management and Marketing and Market Leader Intermediate 3rd Edition (Cotton, Falvey, & Kent, 2010) contain sports idioms which are used to talk about competition in business, e.g. in the driving seat, move the goalposts, etc.
Corpus-based studies have shown that a large number of English idioms occur in two or more lexical and/or syntactic forms and may also be creatively exploited in discourse (Moon, 1998).Many different types of idiom variation have been found, e.g.lexical substitution, the addition of extra words and phrases, As illustrated by the variant forms in (1)-( 4), the use of alternative words and changes to syntactic structure affect the overall idiomatic meaning.In (1) and (2) the same event is conceptualized as static or dynamic, respectively.The expression shift the goalposts in (3) is an example of a synonymous variant, whereby the original and substituting word are semantically related.Example (4) shows that an idiom may portray the same event from a different perspective.Thus, the expression move the goalposts describes a situation in which an agent acts upon another entity, whereas the variant form the goalposts are moving is non-agentive.When it comes to teaching idiom variation in ESP, examples (1)-(4) raise the following questions:  How variable are idioms included in business English textbooks? How do different variation types affect the idiomatic meaning and what functions do they fulfil? Since idiom variation may potentially cause problems for non-native users of English, how can it be incorporated in the ESP classroom?

IDIOM VARIATION IN BUSINESS ENGLISH TEXTBOOKS: A CORPUS-BASED STUDY
The aim of this paper is twofold.Firstly, we aim to show that idioms included in business English textbooks are lexically and syntactically relatively flexible and occur in two or more different forms, which is not reflected in the way they are presented.More specifically, based on a study of ten competition idioms from Market Leader Intermediate 3rd Edition (Cotton et al., 2010) in the British National Corpus and the Corpus of Contemporary American English, we will show that there may be considerable differences between the forms in which idioms are listed in teaching materials and those in which they occur in corpora.Secondly, using the cognitive linguistic theoretical framework, we will show that different variation types change the idiomatic meaning in a specific way and therefore fulfil various functions in discourse.All of this raises the issue of how to incorporate idiom variation in the ESP classroom.
The paper is organized as follows.Section 2 gives a brief outline of the cognitive linguistic approach to figurative language and idiom variation.Section 3 deals with figurative language in business discourse and ESP learning.Sections 4 and 5 present the methods and results of two corpus studies.Section 6 is a general discussion of the results and Section 7 deals with the implications of incorporating idiom variation in the ESP classroom.The final section is the conclusion.
Corpus-based studies of idioms (Langlotz, 2006;Moon, 1998;Omazić, 2003) have identified a number of variation types, e.g.lexical substitution, the addition of new words, modification of nouns by means of adjectives, relative clauses and prepositional phrases, noun inflection, passivization, etc.Furthermore, it has been shown that some verbal idioms vary their lexico-syntactic structure systematically to construe the same event as static or dynamic (let the cat out of the bag vs. the cat is out of the bag), causative or non-causative (bring something to a head vs. come to a head), etc. (cf.Moon, 1998).It has been established that changes to lexical components and syntactic structure result in a shift in the idiomatic meaning, and that different variation types serve specific functions in discourse (e.g.lexical substitution serves as topic indication; cf.Langlotz, 2006).Overall, the mechanisms of idiom variation clearly point to a close connection between the literal and figurative meanings of idioms, as well as the connection between individual idiomatic components and the meaning of the expression as a whole.
Idioms have been identified as a major stumbling block for non-native users of English, but the application of the cognitive linguistic approach to the meanings of idioms has been proved to facilitate comprehension.This becomes all the more important as idioms are very common in business discourse, where they are frequently used in modified form, especially in advertising and newspaper headlines.The key issue is how much exposure learners have to idiom variation in their business English courses.This is dealt with in the following section.

FIGURATIVE LANGUAGE IN BUSINESS DISCOURSE AND ESP LEARNING
Figurative language is pervasive in economics texts and business communication, which is why it has received a lot of attention from ESP researchers and practitioners.There are two major strands of research regarding figurative language in English for business and economics.One is concerned with conceptual metaphor in business discourse, more specifically the types of metaphors used in economics texts and their cross-cultural variation (Boers, 1999;Boers & Demecheleer, 1997), metaphor use in business discourse (Charteris-Black & Musolff, 2003;Koller, 2004;Skorczynska & Deignan, 2006), and the function of metaphor in business meetings (Handford & Koester, 2010).Studies of metaphors in business discourse have shown that very productive source domains for metaphorical expressions in the language of economics and business are HEALTH, WAR and SPORT.For example, in her study of metaphor families in American media, Morgan (2008) shows that business competition is conceptualized in terms of WAR, (TEAM) SPORT, RACE, GAME and PREDATION.The other strand of research focuses on figurative language learning, primarily strategies involving the use of conceptual metaphor in ESP classes.Awareness-raising activities in which explicit reference is made to metaphors have been proved to aid understanding and retention of various types of figurative expressions, e.g.phrasal verbs and idioms (Boers, 2000;Boers & Lindstromberg, 2008;Charteris-Black, 2000;Littlemore, 2002;Littlemore & Low, 2006).
The results of studies of figurative language in business discourse have been applied to teaching materials.Business English textbooks (level Intermediate and higher) contain exercises on figurative expressions which are usually grouped together according to the source domain (e.g.SPORTS, HEALTH, etc.), topic (e.g.idioms used to talk about communication) or their function in discourse (e.g.giving examples in presentations or making your message seem cooperative or conflictual).Some textbooks include figurative expressions that are used to talk about competition in business, which are typically labelled as sports metaphors or sports idioms.2For example, the sports metaphors exercise in Management and Marketing (MacKenzie, 1997) includes expressions such as neck and neck, on the ropes, a level playing field, etc.Market Leader Intermediate 3rd Edition (Cotton et al., 2010) contains ten idioms from sport in a unit that deals with competition.Business Advantage Upper-intermediate (Handford, Lisboa, Koester, & Pitt, 2012) also makes an explicit connection between competitive sport and business and includes figurative expressions such as touch base, the ball's in their court, etc.
Although teaching materials for business English include figurative expressions, some issues have been raised concerning the criteria for their selection.Corpus-based studies have shown there are certain discrepancies between expressions included in textbooks and quantitative data in terms of frequency.For example, Skorczynska Sznajder (2010) has shown that there is only a small overlap between metaphorical words and phrases included in the textbooks and those that occur in a one-million word corpus of business periodical and journal articles.Together with a number of other studies of figurative language in business discourse (e.g.Charteris-Black, 2004;Koller, 2006;MacArthur & Littlemore, 2008;O'Keefe, McCarthy, & Carter, 2007), it stresses the importance of using corpus evidence to determine the frequency of occurrence of figurative expressions, their use, collocational patterns and grammatical behaviour, which can then be applied to developing activities and teaching materials based on authentic examples.
In the study of a specific type of figurative expressions -idioms -corpus data have proved to be invaluable.Studies of English idioms in multi-million word corpora have challenged the notion of those expressions being invariable.In fact, many idioms have two or more conventionalized forms.For example, Moon (1998: 120) has shown that around 40% of idioms in the 18-million word Oxford Pilot Hector Corpus have one variation, and around 14% two or more variations of their canonical forms.Furthermore, idioms are very often creatively exploited in journalism.This is also true of business press articles, particularly headlines, in which idioms are often used in varied forms (Herrera & White, 2010;White, 2011).
Even though research has shown that a number of English idioms are variable, this is not reflected in business English textbooks which contain exercises on idioms.A case in point are sports idioms which are used to talk about competition in business.For example, competition idioms in Market Leader Intermediate 3rd Edition (Cotton et al., 2010) are all listed in a single form.On the other hand, entries in corpus-based idioms dictionaries show that some idioms in this group have alternative forms.
Although there are a number of studies of figurative expressions in the language of economics and business as well as corpus-based studies dealing with ESP teaching materials (for an overview cf.Skorczynska Sznajder, 2010), no study of idiom variation in ESP textbooks has been conducted.Given the fact that idiom variation is widespread, we will use corpus data to show that idioms included in business English textbooks are lexically and syntactically relatively flexible.In addition, we will show how different types of lexical and syntactic changes affect the idiomatic meaning.All of this has important implications for teaching figurative language in ESP.

MATERIAL AND METHODS
A relatively small number of business English textbooks for the intermediate level and higher contain exercises with figurative language.These in turn include between 5 and 16 expressions at the most.For example, the vocabulary tasks in the three Market Leader textbooks -Intermediate, Upper-Intermediate and Advanced -contain 10, 16 and 8 idioms respectively.The sports metaphors exercise in Management and Marketing (MacKenzie, 1997) contains 16 items, some of which are single words (e.g.hurdles).In addition, multi-word units are always listed in one form.
We conducted a study of ten competition idioms from Market Leader Intermediate 3rd Edition (Cotton et al., 2010).This textbook was selected for the study because the vocabulary task involving competition idioms is used in our undergraduate business English course.The textbook forms of idioms are as follows: a level playing field, in the driving seat, to be neck and neck, flogging a dead horse, a major player, move the goalposts, keep your eye on the ball, ahead of the game, a one-horse race, and on the ropes.The forms of two idioms are distinctly British: flog a dead horse and in the driving seat.The fact that the vocabulary exercise lists idioms used in British English was to be expected since the textbook is written in that variety of English.Even so, the book includes a task on words and phrases related to travel which reflect lexical distinctions between British and American English.Therefore, we decided to perform two parallel studies, one in a corpus of British English and the other in a corpus of American English in order to determine whether any of the other eight idioms have corresponding American forms in addition to beat a dead horse and in the driver's seat.
The studies were conducted in the British National Corpus (BYU-BNC; 100 million words) and the Corpus of Contemporary American English (COCA; 520 million words), respectively.The BYU-BNC and COCA have been chosen because of their size and because they contain a wide range of texts.Moreover, owing to the fact that it is regularly updated, COCA is a reliable source of ongoing changes in language (Davies, 2010).Fiction and spoken parts of the corpora which include informal conversations, meetings, TV and radio shows were excluded from the

IDIOM VARIATION IN BUSINESS ENGLISH TEXTBOOKS:
A CORPUS-BASED STUDY study because they are not used as a source of activities and exercises on idioms in most business English textbooks. 3hen searching for variations, we conducted queries consisting of one or more lexical key constituents of each idiom and collocates of the key constituent(s) within the span of 5 words.In each case non-metaphorical uses were manually removed.
We conducted relatively general queries to find potential lexical substitutions as well as syntactic variations.For example, the query for move the goalposts consisted of the lemma goalpost and a lexical verb to find verbs alternating with move and possible syntactic variations.There were two queries for in the driving seat in each corpus: the strings driving seat and driver's seat respectively.These queries were designed to find British and American forms of the idiom, verb variation and syntactic variations, including those without the preposition in.
We obtained 1111 examples of the variant realizations of the ten competition idioms, 266 from the BYU-BNC and 845 from COCA.The variant forms which occur in the corpora were cross-checked against entries in three corpus-based idioms dictionaries: Longman Idioms Dictionary (1998), Collins COBUILD Idioms Dictionary (2002) and Cambridge Idioms Dictionary 2nd Edition (2006).Dictionaries were used to check which forms found in the corpora are conventionalized expressions.Since all three dictionaries are based on multi-million word corpora, they provide reliable evidence of forms in which idioms occur and their conventional and nonconventional use.All competition idioms except a major player are listed in the dictionaries.

RESULTS
Three types of results were obtained.Firstly, all the ten competition idioms are variable and occur in forms which are not included in the textbook.Secondly, competition idioms show different degrees of variability.Finally, variation of competition idioms involves lexical substitution, lexico-syntactic variation and adnominal modification (premodification and postmodification of nouns), with each variation type serving a specific function.

Forms of competition idioms in the corpora
Corpus data show that all ten competition idioms occur in the textbook form as well as in other forms.This is shown in Table 1.Table 1 also shows that some idioms occur more frequently in forms which are not included in the textbook.In the BYU-BNC this is the case with one expression, a one-horse race.The corpus has 7 tokens of the textbook form and 18 tokens of the variant form a two-horse race.In COCA five idioms predominantly occur in forms different from the textbook form (a level playing field, in the driving seat, to be neck and neck, flogging a dead horse and keep your eye on the ball), while a one-horse race does not occur in the written part of the corpus at all.In the majority of cases the variant forms of these six idioms also occur in the BYU-BNC (e.g. a two-horse race), which shows that they are common to British and American English.Only two variant realizations reflect distinctions between the two varieties: COCA has 116 tokens of in the driver's seat and 13 tokens of beat a dead horse, both of which are American idioms.By comparison, the BYU-BNC has one token of in the driver's seat (vs.36 tokens of in the driving seat), while beat a dead horse fails to occur in the corpus.
In comparison with the BYU-BNC, in COCA there are considerable differences in frequencies between the textbook form and other forms in some cases.This could be attributed to corpus size, with COCA being five times larger than the BYU-BNC.The fact that COCA is updated, whereas the texts in the BYU-BNC date up to 1993, may also be a factor.However, taken together, corpus data show that six of the ten idioms occur more frequently in forms which are not included in the textbook.This is shown in Figure 1. Figure 1 shows that of these six idioms, in two cases -a level playing field and to be neck and neck -the difference between the frequencies of the textbook form and other forms is relatively small (48% vs. 52% for a level playing field and 45% vs. 55% for to be neck and neck).The other four idioms predominantly occur in forms which are not included in the textbook.For example, 32% of the tokens of keep your eye on the ball are in the textbook form and 68% are in other forms.The difference is even more prominent in a one-horse race: 16% of the tokens are in the textbook form, whereas 84% are in other forms.

Variability of competition idioms
The results show that competition idioms exhibit different degrees of variability.Two expressions vary only lexically and variation involves specific items, whereas eight expressions occur in several different lexical and syntactic forms.
Idioms which belong in the first group are a one-horse race and a major player.All the variations of a one-horse race ('a situation in which there is only one competitor') relate to the quantifier one, so that the number of participants in a competition changes depending on the construal: (5) Our p. r. objective this year was to convince everyone that this is a two-horse race.Variations of a major player ('an important company or person with a lot of power or influence') relate to the modifier major.Here is an example of its antonymous variant a minor player from COCA: (7) While most people focused on the New York Stock Exchange, the administration also spent a lot of effort to reopen what seemed like a relatively minor player -the New York Mercantile Exchange, where oil contracts are traded.
The other eight idioms occur in two or more different lexical and syntactic forms.
We will illustrate this with the expressions be neck and neck, ahead of the game and a level playing field.
COCA has 115 tokens of neck and neck ('at the same level as the competition').Of these, 47 are in the form be neck and neck and 41 tokens are with other verbs, the most common variant being run neck and neck (33 tokens).This expression also occurs in the hyphenated form neck-and-neck (20 tokens) and is used before nouns, as in the following example: (8) In a very tight, neck-and-neck race, you'd think that there would be some serious competition for this community.
The idiom ahead of the game ('in front of the competition') occurs 23 times in the BYU-BNC and 120 times in COCA.In both corpora the most common form is be ahead of the game, but other verbs alternate with be, as in the following example: (9) 'What's more, this investment is needed if we are to stay ahead of the game.' Of the ten competition idioms, a level playing field ('a situation of fair competition') is lexically and syntactically the most flexible.The adjectives equal and even are used instead of level to refer to a situation that is fair for all competitors.Conversely, the adjectives unequal, uneven and unlevel are used to refer to a situation that is unfair.This idiom also occurs as a verb phrase, with the playing field as the object (10) or the subject (11): (10) It can give a company a competitive advantage or at least level the playing field.
(11) The law established that 25 percent of all city contracts be awarded to minority-owned firms and 5 percent go to women-owned businesses because at the time, the playing field was far from level.
As shown in this section, eight of the ten competition idioms vary considerably, not only lexically, but also syntactically.

IDIOM VARIATION IN BUSINESS ENGLISH TEXTBOOKS:
A CORPUS-BASED STUDY

Types of variations of competition idioms
Corpus data show that competition idioms undergo lexical substitution, lexico-syntactic variation, and adnominal modification (premodification and postmodification of nouns).

Lexical substitution
Lexical substitution relates to individual idiomatic components.Corpus data show that the most commonly replaced idiomatic constituents are verbs and adjectives.
There are two major subtypes of lexical variations, synonyms and antonyms.
One subtype of lexical substitution involves replacing a lexical constituent by a semantically related item to create a synonymous variant.Consider the following alternative forms of the idioms a level playing field (12), move the goalposts (13) and flog a dead horse (14): (12) He said the state should set up an even playing field for independent power suppliers to compete with the utilities.
(13) Congress and the Justice Department keep pushing back the goalposts.
(14) All of which has of course been said before, so there's no point in hammering that particular dead horse still further into the ground.
Examples ( 12)-( 14) show that variation leads to a change in the overall meaning of the idiom to various degrees.In (12) the idiomatic meaning has been adapted slightly by replacing the component adjective level with the broadly synonymous adjective even.Examples ( 13) and ( 14) illustrate changes which have led to an intensification of meaning and thus create a striking stylistic effect.In (13) the idiomatic meaning 'change the rules' is intensified by replacing the verb move -which describes motion in a neutral way -with push back, which denotes a highly energetic action.In ( 14) the meaning of the idiom is elaborated and intensified by the use of the verb hammer which denotes hitting a target with great force, and the addition of the adverbial phrase still further into the ground.Therefore, the expression in ( 14) could be interpreted as 'a complete waste of time'.
The other subtype of lexical substitution is creating an antonymous variant.Consider the following variant forms of the idioms keep your eye on the ball (15) and a major player (16): (15) Rep. Michael Burgess, a Texas Republican, said that BP "appears to have taken their eye off the ball."

57
(16) Newspapers and film and TV are, however, the major players.Alongside them there are many minor players.
Replacing an idiomatic constituent by an antonym in sentences ( 15) and ( 16) has led to the creation of a corresponding antonym of the idiomatic meaning.The expression take your eye off the ball in (15) describes a situation in which a competitor is not paying attention to what they are doing, while minor players in ( 16) denote companies that do not have a lot of power.
In this section we have shown that lexical substitution affects the overall meaning of the expression, most commonly by creating a synonym or an antonym.Some synonymous variants serve to adapt an idiom slightly, whereas more radical changes intensify the idiomatic meaning.On the other hand, antonymous variants create a semantic contrast.

Lexico-syntactic variation
Corpus data show that some verbal idioms vary to construe the same event as static or dynamic (location vs. motion), or as caused motion and self-motion.This variation type involves a change in the number of participants, and alterations to syntactic structure are always accompanied by verb substitution.
For example, in the following variant form of be in the driver's seat, the verb be alternates with get to construe the same event as dynamic: The dynamic variant in ( 17) is an example of the self-motion schema, which describes a participant's own motion, whereas its static counterpart with be specifies the position of a trajector relative to a landmark (Radden & Dirven, 2007: 276ff).
Three idioms which have lexico-syntactic variations in the corpora are listed in the textbook as prepositional phrases: ahead of the game, in the driving seat and on the ropes.However, the descriptions of the idiomatic meanings and examples indicate that these expressions are typically used with the verb be: ahead of the game 'being in front of the competition', in the driving seat 'being in control', on the ropes 'being in a very bad situation'.Corpus data confirm that the static variant with be is indeed the most frequent form of all three idioms in both the BYU-BNC and COCA, but they also occur with force-dynamic verbs.In the latter case, the idioms vary to construe the relation between an entity and a location from different perspectives, i.e. as self-motion or caused motion.This is expressed by verbs that describe a specific motion event and a particular syntactic structure.Consider the following variants of the idiom be ahead of the game:

IDIOM VARIATION IN BUSINESS ENGLISH TEXTBOOKS: A CORPUS-BASED STUDY
There are four other variant realizations which are not listed in the dictionaries, but could be considered conventionalized expressions.Each occurs five times in the BYU-BNC and COCA respectively, which constitutes a frequency cutoff threshold for word combinations in large corpora (Evert, 2005), i.e. items occurring five or more times are not random occurrences. 4Therefore, there are reasonable grounds for the following variant forms to be regarded as conventionalized expressions:  put someone in the driving/driver's seat (textbook form: in the driving seat; example: be in the driving seat)  put someone ahead of the game (textbook form: ahead of the game; example: be ahead of the game)  a two-horse race (textbook form: a one-horse race)  put someone on the ropes (textbook form: on the ropes; example: be on the ropes) The results have also shown that the idiom a major player and its antonymous variant a minor player are conventionalized expressions even though they are not listed in idioms dictionaries.There are 64 tokens of a major player in the BYU-BNC and 142 tokens in COCA, while a minor player occurs 9 times in the BYU-BNC and 42 times in COCA.
Overall, corpus data provide sufficient evidence of the flexibility of forms of competition idioms.Furthermore, the majority of variant realizations found in the two corpora are not creative modifications for stylistic effect, but display regularity.This is in line with previous studies of lexical and syntactic behaviour of idioms, which have shown that idiom variation follows established patterns (cf.e.g.Cignoni, Coffey, & Moon, 1999;Omazić, 2003;Tabossi, Wolf, & Koterle, 2009).For example, constituent verbs and adjectives of competition idioms vary systematically to create antonymous expressions, e.g.keep your eye on the ball/take your eye off the ball.Adnominal modification is systematic in that it restricts the reference of a variant form by adding further specifications, e.g. a major industry player.As regards lexico-syntactic variation, the relation between a trajector and a landmark may be construed as static or dynamic or from different perspectives.The prepositional phrase which specifies the location remains stable, while alterations to lexical and syntactic structure reflect different construals of the same situation as a state or a process (e.g.be in the driving seat vs. get into the driving seat), or as self-motion or caused motion (e.g.get ahead of the game vs. put someone ahead of the game).
All this suggests that idiom variation should be included in the ESP classroom.If idioms are presented and taught in a single form, this could lead learners to believe that they are invariable expressions.Furthermore, variation affects the overall meaning of an idiom and each variation type serves a specific function in discourse.
This raises the issue of how idiom variation can be incorporated in the ESP classroom.We believe that three important factors should be taken into consideration: (1) idiom variation may present a challenge to non-native users of English, (2) idioms are frequently creatively exploited in discourse, and (3) idioms are used not only to convey information but also evaluation.The implications of incorporating idiom variation in ESP are discussed in the following section.

INCORPORATING IDIOM VARIATION IN THE ESP CLASSROOM
All business English textbooks have a language section which includes vocabulary and grammar.In addition to simple lexical units, textbooks contain multi-word units -even at the beginner level -which highlights the importance of constructions in developing learners' lexical competence.Common multi-word units include collocations, the majority of which are part of specialized vocabulary (e.g. market leader, launch a product), but others are part of general English and include figurative expressions.Familiarizing ESP students with figurative language becomes all the more important given that within the Common European Framework of Reference for Languages (CEFR) understanding idiomatic usage is expected at level B2 and higher.Moreover, it is explicitly stated that knowledge of fixed formulae such as idioms and proverbs is a "significant component of the linguistic aspect of sociocultural competence" (CEFR, p. 120).
Teaching materials for business English at advanced levels also contain exercises on lexical variation.These include words and phrases in British and American English which have the same meaning, e.g.subway and underground (Cotton et al., 2010: 15) and verb-noun collocations with schematic verbs that have a wide collocational range, e.g.take decisions/responsibility (MacKenzie, 2010: 23).Introducing idiom variation could be one step further in the development of learners' lexical competence since alterations to the lexical and syntactic structure of idioms result in shifts in meaning.The fundamental issue with idiom variation is that it may make the learning of idioms more challenging, but there are several possible solutions to this.One is using the systematicity behind variation, which should be based on meaning.This could help reduce "the perceived arbitrariness of the foreign language system" (Taylor, 2008: 57).The systematicity behind variation can be the basis for visual or other types of representation to accommodate for different types of learners.This approach is in line with lexical exercises included in some business English textbooks, which involve noun formation using suffixes or opposite adjectives using prefixes.If types of idiom variation are treated as systematic and constrained (just like morphological variation), then such exercises can easily be included in the ESP classroom.For example, lexical substitution of competition idioms involves creating synonyms and antonyms, and lexico-syntactic variations reflect static and dynamic construals of the same event or portraying the same scene from different perspectives.
Another solution is the use of authentic materials illustrating variation to increase motivation (Berardo, 2006;Dörnyei & Csizér, 1998).For example, business press articles are an ample source of idiom variation.This is where variation itself comes into focus, as it becomes important to raise learners' awareness of the fact that journalists often use modified idioms in headlines to attract readers' attention to the article.ESP teachers could use activities and exercises aimed at raising awareness not only about idioms being variable, but also about the fact that they are often used in non-canonical forms.In order to tackle idiom variation, ESP learners can experiment themselves by playing with figurative language (Littlemore & Low, 2006).For example, they can write advertisements for products in which they include idiomatic expressions and vary their structure and meaning to fit the product.
Incorporating idiom variation in the ESP classroom becomes especially important at advanced levels since it has been shown that a large number of idioms are used not only to convey information but also evaluation (Moon, 1998: 221ff).This is reflected in CEFR, which states that idiomatic expressions "both incorporate and reinforce common attitudes" (CERF, p. 20).Exercises in which the evaluative function of idioms is discussed have already become a part of some business English textbooks.For example, the textbooks in the Market Leader series contain exercises in which learners have to decide which idioms have a positive meaning and which a negative meaning (Cotton et al., 2010: 68), while the textbooks in the Business Advantage series teach how to use idiomatic expressions in spoken communication in order to respond to situations positively or negatively (Lisboa & Handford, 2012: 53).Using an idiom in a modified form is also a way of expressing evaluation, as it involves adapting a conventionalized expression to a specific situation by changing its lexical and/or syntactic structure.This is an established function of idiomatic creativity in discourse.Therefore, ESP teachers should raise learners' awareness of the fact that the non-conventional use of an idiom conveys the speaker's attitude toward a situation.Ultimately, this means empowering learners with the knowledge that will enable them to communicate in English more effectively.

CONCLUSION
The aim of this paper was to show that idioms in business English textbooks are variable, and to give an account of how different variation types affect the idiomatic meaning and what functions they have in discourse.We conducted two corpus studies of ten idioms which are used to talk about competition in business.
The results show that competition idioms are lexically and syntactically relatively flexible and occur in the textbook form as well as in other forms.Moreover, in 6 out of 10 cases there are considerable differences between the frequencies of the textbook form and those in which the idioms occur in the corpora.The results also show that different variation types affect the idiomatic meaning in specific ways.We therefore argue for idiom variation to be included in the ESP classroom, especially at advanced levels.Since it may potentially cause problems for learners, idiom variation should be presented and taught in ways which facilitate learning.
One final issue concerning idiom variation is what should be the basis for the choice of variant forms which are to be taught in ESP.We believe that it should be frequency and conventionality.In order to establish the frequency of figurative expressions and how conventionalized they are, two types of reliable sources should be used: corpora and corpus-based idioms dictionaries.
On a more general level, this study highlights the importance of the use of corpora in ESP and the advantages of applying the cognitive linguistic approach to teaching figurative language.Corpora are a reliable source of examples of variant forms of idioms, more specifically large general corpora which contain hundreds of millions of words.Specialized corpora are another valuable source, but most of them are not available to ESP teachers.Moreover, they tend to be relatively small and therefore may not present an accurate picture of an idiom's lexical and syntactic behaviour.On the other hand, owing to their size and the fact that they contain a wide range of texts, general multi-million word corpora provide sufficient evidence of forms in which idioms occur and their conventional and non-conventional use. 5he application of the cognitive linguistic approach to teaching figurative language in ESP could be extended to include idiom variation.More specifically, ESP students should be encouraged to make a connection between modified forms of idioms and their meanings.Raising students' awareness of the fact that idiom variation is systematic and of how variations change and adapt the idiomatic meaning to specific contexts may significantly facilitate comprehension of idioms in their modified forms.

Figure 1 .
Figure 1.Frequencies of the textbook form and other forms in the BYU-BNC and COCA

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In 1948, when  Harry Truman won a four-horse race, the Dow dipped 2% for the year.

Table 1 .
Occurrences of competition idioms in the BYU-BNC and COCA