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Revision as of 16:31, 31 July 2011 by Duoduoduo (talk | contribs) (corrections in lede; downplay non-example; delete bad example)(diff) ← Previous revision | Latest revision (diff) | Newer revision → (diff)In English grammar do-support or do-insertion refers to the use of the auxiliary verb do in negative or interrogative clauses that do not contain other auxiliaries.
While the English word do may also serve as a main verb, as in "We do the laundry on Sundays", do support occurs only in the presence of another verb serving as the main verb, as for example in the conversion of I go there to either the question form Do I go there? or the negative form I do not go there.
In English, all questions and all sentences with negative polarity feature an auxiliary verb. Sentences that do not include a modal auxiliary or a form of have or be include a form of do. This auxiliary do may be inflected for person, number, and tense, and may carry the negative clitic n't. The auxiliary has no meaning in itself.
Negation
Negative sentences in English are formed by placing the negative adverb not after the first auxiliary verb in the sentence. If a sentence has no other auxiliary, a form of the word do is placed where the first auxiliary would otherwise be, with not or n't following it. Compare the following two sentences:
- Jean flirted with Yuri.
- Jean did not flirt with Yuri.
In the first example, the verb flirt appears in the past tense. In the second, related sentence, the past tense form of do, did, and the word not appear before the plain form of the verb. One may think of the past tense as having moved to a position before not, where the auxiliary do is inserted in order to carry it.
Questions
Simple yes-no questions in English are formed by placing the first auxiliary at the front of the sentence, before the subject. If there is no other auxiliary, do occurs in this position.
- Jean flirted with Yuri.
- Did Jean flirt with Yuri?
So-called Wh-questions, containing an interrogative word such as who, what, when, where, why, how, or the like, show the same pattern of subject-auxiliary inversion seen in yes-no questions, and use similar do-support.
- 3. Who did Jean flirt with? OR With whom did Jean flirt?
Tag questions are formed with a copy of the first auxiliary and a pronoun version of the sentence's subject at the end of the sentence. As with other questions, sentences that contain no other auxiliary use do-support.
- 4. Jean flirted with Yuri, didn't he?
See also
References
- In some dialects of English, do-support occurs when have is used as a main verb (e.g. Do you have any bananas?), while other dialects do not require it (Have you any bananas?).
- Traugott, Elizabeth Closs; Pratt, Mary Louise (1980), Linguistics for Students of Literature, San Diego: Harcourt Brace Jovanovich
- ^ Kaplan, Jeffrey P. (1989), English Grammar: Principles and Facts, Englewood Cliffs, New Jersey: Prentice-Hall