havent

Haven't is the contraction of have not. It is used with subjects that take have in the present tense— I, you, we, they, and plural nouns—to negate a present perfect construction: I haven't finished yet; They haven't seen that film. For third-person singular subjects, the corresponding form is hasn't (has not).

Spelling, pronunciation, and formality: Haven't is spelled with an apostrophe between have and not. It is typically pronounced /ˈhæv(ə)nt/. In informal speech, the vowel may be reduced. In formal writing, the uncontracted form have not or has not may be preferred.

Usage notes: Contractions like haven't are common in informal writing and speech. In British English, haven’t got is often used to express possession (as in I haven’t got any money), whereas in American English, have not is more commonly realized as a separate negative without the with-construct possessive variant. The contraction is not used with the auxiliary have in contracted past tenses; for past perfect you would use hadn't (had not).

Origins: The contraction emerged in Early Modern English as a shortened form of have not and has since become a standard feature of English negation for the present perfect and related constructions.

See also: has not, have not, contractions in English, present perfect. Examples of usage illustrate its role in negating actions or states up to the present moment.