Must/ mustn’t, have to/ don’t have to

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EXTRA English 22 Haunting at Halloween Grammatik und Übungen

Must/ mustn’t, have to/ don’t have to

We use must/mustn't to indicate the law or a strong obligation.

 You must drive on the left.

 You must pass an examination to enter the college.

 You mustn't smoke in class.

 You mustn't turn left at the lights.

Must and have to have more or less the same meaning.

 You have to beware of black hair and the number three.

 You have to drive on the left.

However, mustn't and don't have to are different. Don’t have to indicates that something isn't necessary.

 I don't have to pass an examination to enter the college.

A. Complete these sentences with must / mustn't or have (has) to / don't (doesn't) have to.

1. We __ don’t have to _________ pay for tickets, the concert is free.

2. I _ _must_________ go and get some petrol.

3. My English cousin __doesn’t have to____ do military service – it isn't compulsory there.

4. We ___have to____ get to school early tomorrow, the exam starts at 8 am.

5. You _ mustn’t _____ drive so fast – you're breaking the speed limit!

6. You __mustn’t___ use a dictionary during the exam – it's against the rules!

Should / shouldn’t

We use should to give advice or make a suggestion.

 Bernard, I really don't think that you should be on the roof.

 You shouldn't smoke.

 She should see the new James Bond film – it’s great!

A. Complete these sentences using should or shouldn’t.

1. That's a very bad cough, you ______really should see a doctor__________________ . 2. It's raining, you __________shouldn’t walk ____________________ in the street.

3. 20 cigarettes a day? You __________should cut down on your smoking___________ .

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EXTRA English 22 Haunting at Halloween Grammatik und Übungen

4. You __________shouldn’t__________________ make fun of Bernard, he's very upset.

5. Bernard ___shouldn’t _ allow his cat to walk around the building – she gets lost easily.

Should have

We use should have and shouldn't have to give advice or make a suggestion about an action in the past.

 He’s the man. He should’ve gone. (= But he didn’t go.)

 She shouldn’t have gone. (But she did go.)

A. Complete these sentences with a past suggestion using the verb in brackets.

1. Nick was very nervous. Hector ___shouldn’t have told _________ (tell) the ghost story.

2. You ate all the chocolates! You ___should’ve given ____________ (give) some to me!

3. You were very rude to the traffic warden. You __ shouldn’t have done_ ____ (do) that!

4. They were late for the concert. They ____should’ve caught ____ (catch) an earlier train.

5. Why did you drive past that girl? We ___should’ve given ____ (give) her a lift in our car.