Must / Mustn T, Have to / Don T Have To

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 ______pay for tickets, the concert is free.

2. I ______go and get some petrol.

3. My English cousin ______do military service – it isn't compulsory there.

4. We ______get to school early tomorrow, the exam starts at 8 am.

5. You ______drive so fast – you're breaking the speed limit!

6. You ______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 ______.

2. It's raining, you ______in the street.

3. 20 cigarettes a day? You ______.

4. You ______make fun of Bernard, he's very upset.

5. Bernard ______allow his cat to walk around the building – she gets lost easily.

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 ______(tell) the ghost story.

2. You ate all the chocolates! You ______(give) some to me!

3. You were very rude to the traffic warden. You ______(do) that!

4. They were late for the concert. They ______(catch) an earlier train.

5. Why did you drive past that girl? We ______(give) her a lift in our car.