Find the mistakes and underline them. Then write the correct sentences.

1. I can’t to come to your Christmas party next week. I can’t come

2. Do you can ride a bicycle?

3. They say she cans run very fast.

4. Could they to go to the air show tomorrow?

5. We can’t visit the folk dance festival yesterday.

6. He didn’t can get to the school ball last Saturday.

Rewrite the sentences with perhaps or maybe, without changing the meaning.

1. I may play football next Saturday. (perhaps)

Perhaps I will play football next Saturday.

2. He might come with us to the New Year’s Dance. (maybe)

3. Chelsea might win the Champion League. (perhaps)

4. They may invite us to their engagement party. (maybe)

5. She might go to the Easter Races without you. (perhaps)

6. We may put up the Christmas decorations tonight. (maybe)

19. Write the rules by completing them with you must (+) or you must not (-)

1. drive on the left in Britain. (+) You must drive on the left in Britain.

2. cross the road at the zebra crossing (+)

3. walk on the grass (-)

4. smoke inside the restaurant (-)

5. wear a seat belt when you drive (+)

6. go out without your identity card (-)

Tick the correct sentences.

1. a)(˅) Notice: Deep water. You must not swim here.

b)() Notice: Deep water. You don’t have to swim here.

2. a)() Mother: You mustn’t get up early tomorrow. There is no school.

b)() Mother: You don’t have to get up early tomorrow. There is no school.

3. a)() Teacher: You mustn’t run in the corridors. It’s dangerous.

b)() Teacher: You don’t have to run in the corridors. It’s dangerous.

4. a)() Policeman: You mustn’t drive so fast. It’s 50-km-per-hour zone.

b)() Policeman: You don’t have to drive so fast. It’s 50-km-per-hour zone.

5. a)() Classmate: You mustn’t give in your essay until Friday. There’s lots of time.

b)() Classmate: You don’t have to give in your essay until Friday. There’s lots of time.

6. a)() Judge: I’m banning you from driving for 12 months. You mustn’t drink and drive again.

b)() Judge: I’m banning you from driving for 12 months. You don’t have to drink and drive again.

Replace the phrases in bold with a modal verb phrase. Sometimes there is more than one possible answer.

1. Is it true that cats are able to see in the dark? ______ can ______

2. It’s necessary for you to wear sunscreen when you go to beach. ________

3. It’s impossible for it to be that expensive. I’m sure there is a mistake. ______

4. Do you think it’s the right thing for me to buy Alex a birthday present? ______

5. The doctor said I’m not allowed to lift anything heavy. ______________

6. It’s possible that we’ll be a bit late tonight. ________________

7. It’s not necessary for you to join the team if you don’t want to. ___________

8. Frank’s not in his office. I suppose it’s possible that he’s at lunch. _________

9. Come on, put those books away – it’s not a good idea for you to be studying at this time of night. ___________