BASIC-GRAMMAR-U-10.2

	10.2.	*have to, have got to, don’t have to,*
		*must and mustn’t*

PRESENTATION

Use have to, must and mustn’t to talk about obligation.

Use don’t have to to say that there is no obligation to do something.

don’t have to doesn’t mean the same as mustn’t

You don’t have to do it. It isn’t necessary.
You mustn’t do it = Don’t do it!

have got to means the same as have to

You’ve got to wash your hands.
You have to wash your hands. (have got to is informal.)

TIP

There isn’t much difference between have to and must. You can

use must to talk about personal obligations:

I must lose some weight.

Have to is more impersonal:

Police officers have to wear a uniform.

Affirmative and negative

You

They

have to

don’t have to

wear a uniform.

She

has to

doesn’t have to

Yes/No questions

I / You / We / They

have to

wear a uniform?

Does

he / she

Short answers

Yes,

I / You / We / They

do.

he / she

does.

No,

I / You / We / They

don’t.

he / she

doesn’t.

Key vocabulary

Work: clean the kitchen, clear the table, cook the food, job, job description, rules, serve the customers, tidy the clothes

, wear a uniform

Clothes: shirt, trousers, uniform

EXERCISES⇒

BASIC-GRAMMAR-U-10.2

10.2.

have to, have got to, don’t have to,

must and mustn’t