In informal|nonstandard|lang=en terms the difference between havent and didnt
is that havent is (informal|nonstandard) while didnt is (informal|nonstandard).
As contractions the difference between havent and didnt
is that havent is (informal|nonstandard) while didnt is (informal|nonstandard).
havent
English
Contraction
(
en-cont)
(informal, nonstandard)
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