- They have not been invited.
- She has not come.
- I cannot come.
When be (is, am, are, was, were) is the main verb, we make negative forms by putting not after be.
- She is not ready.
- You are not late.
- I was not surprised.
When have is the main verb, we make negative forms by putting do not before have.
- They do not have a car.
- He does not have a good job.
When there are no auxiliary verbs, we make negative forms by putting do not before the verb. After do not we use the infinitive without to.
- Money does not grow on trees.
- She did not come.
Before infinitives and -ing forms, we use not to make negative forms.
- It is important not to be late.
- The best thing about a computer is not complaining.
Negative questions can be contracted or uncontracted. Contracted negative questions have the word order auxiliary verb + n’t + subject. They are less formal.
- Can’t we wait?
- Won’t she come?
- Hasn’t she any friends to invite?
Uncontracted negative questions have the word order auxiliary verb + subject + not .
- Can we not wait?
- Will she not come?
- Has she not any friends to invite?