modals79

79 must

I must do some work tonight.

We must get up early tomorrow. You must not talk during the exam.

USE

•    must do something = it is very important to do something. must is stronger than should:

I must do some work tonight.

(= I have work to do. It is very important that I do some tonight.)

We must get up early tomorrow.

(= It is very important to get up early tomorrow.)

You must not talk during the exam.

(= It is very important that you do not talk during the exam.)

•    We can use must to talk about the present or the futurę:

We must go now.

We must go soon.

79a Rewrite the sentences using must or must not:

1    It is very important for me to study hard for this exam.

I must study hard for this exam.

2    Don’t talk in the library.

You must not talk in the library.

3    It is important for her to work harder.

4    It is necessary for them to be here at 9 o’clock.

5    Do not enter this room.

6    It is important for him to see a doctor quickly.

7    It is necessary for us to work all night tonight.

8    Please listen carefully.

9    It is very important that children do not leave school before 4 o’clock. 10 It is very important that passengers wait for the train to stop.

79b It is very important that Emma passes her exams. Her parents are giving her strong advice. Write sentences with must or must not, mustn’t:

1    Don’t go out to parties.

You mustn't go out to parties.

2    Study hard for these exams.

3    Go to all the classes.

4    Do all your homework.

5    Don’t stay out late.

6    Don’t spend too much time with your friends.

7    Read all your notes again.

8    Don’t go to bed late.