Isn’t/ haven’t/ don’t

  • We use not (n`t) in negative sentences:

positive → negative

am
is
are
was
were
have
has
will
would
can
could
should
must

am not (`m not)
is not (isn`t
or `s not)
are not (aren`t
or `re not)
was not (wasn`t)
were not (weren`t)
have not (haven`t)
has not (hasn`t)
will not (won`t)
would not (wouldn`t)
cannot (can`t)
could not (couldn`t)
should not (shouldn`t)
must not (mustn`t)

I` m not tired.
It isn`t ( or It `s not) raining.
They aren`t ( or They` re not) here.
Jack wasn`t hungry.
The shops weren`t open.
I haven`t finished my work.
Sue hasn`t got a car.
They won`t be here tomorrow.
I wouldn`t like to be an actor.
George can`t drive.
I couldn`t sleep last night.
You shouldn`t work so hard.
I mustn`t forget to phone Ann.

I/we/you/they do not (don`t)
he/she/it does not (doesn`t)

bracket to table

+ infinitive ( work/live/go etc.)


I/they/he/she etc. did not (didn`t) + infinitive
 

positive
I smoke.
They work hard.
Tom plays the guitar.
She likes her job.
 
I got up early.
We worked hard.
They saw the film.
She had a bath.

negative
I don`t smoke.
They don`t work hard.
Tom b the guitar.
She doesn`t like her job.
 
I didn`t get up early.
We didn`t work hard.
They didn`t see the film.
She didn`t have a bath.

  • The negative of ‘Look!’, ‘Go away!’ etc. is ‘Don`t... !’:

Look!
Go away!

Don`t look!
Don`t go
away!

  • Do can also be the main verb ( don`t do / didn`t do etc.):

positive
Do it.
He does a lot of work.
I did the examination.

negative
Don`t do it.
He doesn`t do much work.
I didn`t do the examination.