Negative Contractions

These tables show you all the short forms of auxiliary verbs and modals followed by 'not'.

Auxiliary + not

We can use the present and past form of auxiliary verbs with 'not' in the short form.

Auxiliary + not (present)
long form short form
have not haven't
has not hasn't
is not isn't
are not aren't
do not don't
does not doesn't

There is no short form of 'am not'.

Auxiliary + not (past)
long form short form
had not hadn't
was not wasn't
were not weren't
did not didn't
Modal + not
long form short form
can not can't
could not couldn't
shall not shan't
should not shouldn't
will not won't
would not wouldn't
must not mustn't
might not mightn't

Is it uncommon to use the short form of 'may not'.

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