may / must / can / mustn't / needn't / can't

Fill in the gaps:

1 '____ I go out, mummy?' - 'No, you ____ , you ____ do your homework.

2 The doctor says I ____ stay in bed till my temperature falls.

3 You ____ water the flowers, Dora has already watered them.

4 ____ you play the piano? - I ____ play very well.

5 You ____ smoke in the classroom, you ____ smoke only in the corridor.

6 There isn't water in the pool, so we ____ swim today.

7 Tony's got a bad cold, so he ____ swim today.

8 There's a bridge over the river, so we ____ swim across.

9 'Have you got enough money?' - 'Oh, yes, we ____ go to the bank.'

10 They ____ hurry if they want to catch the bus.

11 '____ I sit here?' - 'Yes, you ____ sit anywhere in the room.'

12 '____ I turn on my radio?' - 'No, you ____ , everybody's sleeping?'

13 There's a bus to George Street, so we ____ walk.

14 Dora ____ walk because she broke her leg.

15 '____ I go to the cinema?' - 'Yes, but you ____ get home before ten.'

16 You ____ cross the street when the light is red.

17 You ____ cross the street here - there are railings all around.

18 '____ I take a bus?' - 'No, you ____ . The station is not very far.'

19 We ____ walk to the other side of the wood, there's a river in between.

20 The boss says we ____ leave the office before we finish this work.

Choose the right verb.


1) Sorry, I ______eat that vegetable. I don't like it.
[ ]can't
[ ]shouldn't
[ ]mustn't
2) The doctor told me: “You ______eat less sugar.
[ ]should
[ ]can
[ ]may
3) If you continue eating so much fatty food, you ______have cardiovascular problems.
[ ]must
[ ]should
[ ]may
4) ______I eat as many fruit and vegetables as I want?
[ ]must
[ ]can
[ ]could
5) Your child is too fat. He ______eat fewer sweets.
[ ]could
[ ]may
[ ]should
6) To be in good health, you ______walk at least half an hour.
[ ]must
[ ]can
[ ]should
7) You ______suffer from heart diseases because you eat too much junk food.
[ ]must
[ ]may
[ ]should
8) 150kg!!! You ______lose weight.
[ ]may
[ ]must
[ ]shouldn't
9) You ______use less salt when you cook. It's bad for your health.
[ ]mustn't
[ ]can't
[ ]could
10) You ______eat more fruit and vegetables to be in good health.
[ ]must
[ ]should
[ ]can

1. Complete the sentences with can / can’t / could / couldn’t:

a. I’m afraid I can’t come to your party next week.

b. When Tim was 16, he was a fast runner. He ______run 100 metres in 11 seconds.

c. I was feeling sick yesterday. I ______eat anything.

d. Can you speak up a bit? I ______hear you very well. e. ______you please help me wash the car?

f. Jessica ______speak French and also Italian.

g. She ______finish painting the room by tomorrow. She’s too busy. h. We ______sleep. You are making too much noise.

i. In my country you ______get married when you are 16. It’s illegal. j. Last night I ______get into my house because I had forgotten my key.

2. Complete the sentences with must / mustn’t / have to / don’t have to / should / shouldn’t:

a. Pupils don’t have to attend the game. It’s optional.

b. You ______leave knives in places where babies can reach them. c. I’m fat. The doctor said I ______eat too many sweets and potatoes. d. You ______play with the knife! You’ll cut yourself.

e. I ______pay the telephone bill next week.

f. People ______smoke in non-smoking areas.

g. Students ______go to school on Sundays.

h. All children under the age of 16 ______go to school. It is the law.

i. I really think you ______cut your hair.

j. I like Sundays because I ______get up early.

3. For each situation write a sentence with should or shouldn’t using one of the following verbs:

a. go away for a few days b. go to bed so late c. look for another job d. use her car so much e. put some pictures on the walls f. take a photograph

a. (Liz needs a change). She should go away for a few days.

b. (My salary is very low).

c. (Jack can’t get up in the mornings).

d. (What a beautiful view!).

e. (Sue drives everywhere. She never walks).

f. (Bill’s room isn’t very interesting).

4. Fill in the gaps choosing the right modal verb:

a. The doctor says I (should / can) should rest more.

b. When I was young, I (could / had to) ______get up very early in the morning to walk to school.

c. (Could / Had to) ______you ride a bike when you were three years old?

d. If you want to keep healthy, you (mustn’t / can’t) ______smoke and you (can / should) ______do exercise.

e. I (can’t / couldn’t) ______speak English when I was nine years old.

f. “(Can / Must) ______you help me? (Can / Should) ______I use your phone?”

g. Children under sixteen (mustn’t / don’t have to) ______drive cars.

5. Correct the mistakes:

a. He must to be there by six o’clock. He must be there by six o’clock.

b. You don’t have to park here. It’s forbidden.

c. You should talked to him. He’s very upset.

d. He cans speak three languages.

e. You have see the doctor.

f. Did you can finish your work last night?

Possible solutions:

1 May I go out, mummy?' - 'No, you mustn't, you must do your homework.

2 The doctor says I must stay in bed till my temperature falls.

3 You needn't water the flowers, Dora has already watered them.

4 Can you play the piano? - I can't play very well.

5 You mustn't smoke in the classroom, you may smoke only in the corridor.

6 There isn't water in the pool, so we can't swim today.

7 Tony's got a bad cold, so he mustn't swim today.

8 There's a bridge over the river, so we needn't swim across.

9 'Have you got enough money?' - 'Oh, yes, we needn't go to the bank.'

10 They must hurry if they want to catch the bus.

11 'May I sit here?' - 'Yes, you may sit anywhere in the room.'

12 'May I turn on my radio?' - 'No, you mustn't, everybody's sleeping.'

13 There's a bus to George Street, so we needn't walk.

14 Dora can't walk because she broke her leg.

15 'May I go to the cinema?' - 'Yes, but you must get home before ten.'

16 You mustn't cross the street when the light is red.

17 You can't cross the street here - there are railings all around.

18 'Must I take a bus?' - 'No, you needn't . The station is not very far.'

19 We can't walk to the other side of the wood, there's a river in between.

20 The boss says we mustn't leave the office before we finish this work.

ANSWERS:
1. can't
2. should
3. may
4. can
5. should
6. should
7. may
8. must
9. could
10. Should