It's important to understand in the examples above that
the main verb is in the simple form. You can make any verb
negative in the present and past tense with this method--but
not the verb "be."
Below are examples of how to make the present
and past tense negative with verbs other than "have."
simple
past
have
had
eat
ate
see
saw
be
was / were
Today I don't have any work to
do. (present tense)
Yesterday I didn't have any work
to do. (past tense)
I usually don't eat a big breakfast.
(present tense)
Yesterday I didn't eat a big breakfast.
(past tense)
I don't see movies very often.
(present tense)
I didn't see that movie yet. (past
tense)
The verb "have" is also used as an auxiliary verb
(or you can call it a "helping verb") when making the present
perfect tense.
