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Grammar. Must / have to / mustn’t / don’t have to / needn’t Must– our own decision Have to– decisions taken by other people. Have to– for



Must / have to / mustn’t / don’t have to / needn’t

Must– our own decision   Have to– decisions taken by other people.   Have to– for tenses and forms that are not possible with must. Mustn’t - prohibition Needn’t / don’t need– decision was made by the speaker Don’t have to – the speaker reports someone else’s decision. I mustlearn English. You mustcome back before 10 p.m. We have toget up very early to be at school on time. I have towrite two essays by Monday. I had togo to bed early last night. I hate having toget up early. You mustn’tleave the class during the test. You needn’tcome before 9 o’clock.   He says we don’t have tocome before 9 o’clock.

1. Fill in must or have to.

1. You … study hard to know English well.

2. It looks like raining. You … take your raincoat.

3. The students … do their homework regularly.

4. He … stay at home. His mother is ill.

5. You … tell her this news. She is waiting for it.

2. Fill in have to, has to, don’t / doesn’t have to, didn’t have to, had to or won’t have to.

1. It’s Sunday tomorrow so I … get up early.

2. There’s no school tomorrow, so the children … go to bed early.

3. We went to a restaurant yesterday, so we … cook.

4. Lucy feels better now, so she … take the medicine.

5. It was very cold yesterday so I … wear a coat.

6. She … wear glasses or else she can’t read.

7. I can’t go out tonight. I … study for my exam.

3. Fill in the gaps with mustn’t or needn’t.

A teacher is speaking to his students before a test.

“You are going to have a test today. Your test papers are on your desks. You … begin until I tell you. You … hurry; you have plenty of time. You … speak during the test. You … copy your friends’ work and you … open any of your books. You … write in pen; if you prefer you can write in pencil. You … stay when you are finished; you can leave if you want to, but you … be noisy. When you leave you … wait for your friends outside the classroom. Wait outside the building! Finally, I wish you all good luck. You can begin now!”





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