We put not after the first word of the verb. In speaking, we often use the short form (n't).

With the verb be

I am not a pharmacist.
They aren't coming.
It wasn't very cold there.
He is not a surgeon.

With one-word verb formations

Put the correct form of the verb do (Unit 15) before not.


[A] He works on Fridays.
[N] He does not work on Saturdays.

[A] These shops sell health food.
[N] They do not sell health food.

[A] They worked in a nursing home.
[N] They didn't work in a hospital.

With other verb formations

Put not after the first auxiliary verb.

I haven't seen a dentist in five years.
Our crew has not been late this year.
He wouldn't have gone if he had known.
They aren't doing biology this term.

Word agreement

Look at the different words in AFFIRMATIVE and NEGATIVE sentences.

[A] John is going somewhere but
[N] Maria isn't going anywhere.

[A] John has got some money but
[N] Maria hasn't got any money.

[A] They have got a lot of money but
[N] we haven't got much money.

[A] I've got a lot of friends but
[N] he hasn't got many friends.

[A] John and Maria have already left but
[N] we haven't left yet.

[A] John is leaving too and
[N] Maria isn't staying either.

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Exercise 5.1