Modal Verbs Must[1]

Must is always followed by a verb in the infinitive without to. E.g.: He must practice his English. Must expresses necessity / obligation Negative form = must + not Must is a modal verb. It always keeps the same form in the present. E.g.: I must study to pass the exams.

= mustn’t E.g. Mary must not smoke

She must study to pass the exams.

Mary mustn’t smoke.

“In Britain, children must go to school between the ages of five and sixteen.” A) Choose the sentence that means the same as the one above.

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In Britain, children can't go to school between the ages of five and sixteen.

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In Britain, children have to go to school between the ages of five and sixteen.

B) Complete the sentences with must / mustn’t + one of the verbs in the box: cheat •

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•

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go

open

pay

C) Say what you must or mustn’t do in school.

wash

I __________ to bed early because school starts at 9 o´clock.

Children ________ the door to strange people.

You ___________ your hands before eating.

Students __________ in class.

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Play in the classroom.

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I ____________________________

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Respect teachers and classmates.

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_____________________________

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Eat and drink in the classroom.

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_____________________________