MODAL VERBS

HAVE TO

SHOULD: ADVICE

MUST

MODAL VERBS

HAVE TO/ MUST/ DON'T HAVE TO/ MUSTN'T/ SHOULD/ SHOULDN'T/ OUGHT TO

DON'T HAVE TO

CAN'T MUSTN'T

HAD BETTER/ HAD BETTER NOT

CAN'T AND MUSTN'T

Must is used to say that something is necessary or obligatory. It means that there is no choice. Examples: You must wear a helmet when you ride a bike. Students must do their homework. Can’t is used to say that something is not allowed or impossible. It means that something is forbidden. Examples: You can’t use your mobile phone in class.

HAVE TO

In affirmative sentences it is used as something it is important to do or necessary. EX: I HAVE TO CLEAN MY ROOM

DON'T HAVE TO

Don’t have to is used to say that something is not necessary.It means that you can do it, but it is optional. Examples: You don’t have to wear a uniform at this school. You don’t have to bring your book today.

SHOULD AND OUGHT TO

• We use should/shouldn't/ought to to give advices in a positive or negative way.

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MUST

It is used to say that we, or other people, have an obligation to do something