剑桥语法在用中级31~32

31.1

3 I have to go / I'll have to go

4 do you have to go / will you have to go

5 he has to get up

6 We had to run

7 does she have to work

8 I had to do

9 do you have to be

10 We had to close

11 did you have to pay

31.2

3 have to make

4 don't have to decide

5 had to ask

6 don't have to pay

7 didn't have to go

8 has to make

9 had to stand

10 will have to drive / 'll have to drive / is going to have to drive

31.3

3 OK (I have to remember is also correct)

4 I had to walk home.

5 OK (You have to come is also correct)

6 He has to study

7 We have to go

8 She has had to wear glasses since …

For the present perfect (has had) with

since, see Units 11–12.

31.4

3 don't have to

4 mustn't

5 don't have to

6 doesn't have to

7 don't have to

8 mustn't

9 mustn't

10 don't have to

32.1

2 d

3 b

4 e

5 g

6 a

7 c

32.2

2 must

3 mustn't

4 don't need to

5 mustn't

6 needn't

7 mustn't

8 don't need to

9 needn't … must

32.3

2 needn't come

3 needn't walk

4 needn't keep

5 needn't worry

32.4

2 You needn't have walked home. You could have taken a taxi.

3 They needn't have stayed at a hotel. They could have stayed with us.

4 She needn't have phoned me at

3 am. She could have waited until the morning.

5 You needn't have shouted at me. You could have been more patient.

32.5

3 You needn't shout. / You don't need to shout. / You don't have to shout.

4 I didn't need to go out. / I didn't have to go out.

5 OK

6 You needn't lock the door. / You don't need to lock the door. / You don't have to lock the door.

7 I didn't need to say anything. / I didn't have to say anything.

8 OK