1. Supply can, may, must and their negative forms (can’t / may not / mustn’t) where needed.

1. Have you seen my bag? I ……… find it.

2. .......... I sit next to you if this seat is free?

3. “Do you know where Jack is?” – “He ………. be in his office busy with important documents. Call there”

4. Come on! We ………. hurry. The train leaves in half an hour.

5. I like this hotel room. You ………. see the mountains from the window.

6. I’m sorry but we ………. come to your party next Saturday.

7. I………. get up earlier tomorrow. I’ve lots of work to do.

8. She got this job because she ………. speak five languages.

9. Sue has dislocated her ankle. She ………. come to disco tomorrow.

10. Take your umbrella with you. It ……… rain tonight.

11. The windows are very dirty. I ………. clean them.

12. These cakes are very nice. You ………. have one.

13. This is a secret. You ………. tell anybody.

14. We ………. go to the cinema this week. Would you like with us?

15. You are speaking very quietly. I ………. hear you.

2. Rewrite these sentences using can, can’t, could, couldn’t.

1. Do you see that man over there? Can you see that man over there?

2. I smell something burning ………………………………………………………………...

3. I understood what he did ………………………………………………………………….

4. Did you understand what he said? .......................................................................................

5. I don’t see anyone …………………………………………………………………………

6. I didn’t see what happened ………………………………………………………………..

3. Supply can, can’t, could, couldn’t, was / were able to, managed to. Alternatives are possible.

1. A good 1500-meter runner can run the race in four minutes.

2. Bill is so unfit. He………. run at all!

3. Our baby is only nine months and it ………. already stand up!

4. When I was younger, I ………. speak Italian much better than I ………. now.

5. ………. she speak German very well? – No, she ………. speak German at all.

6. He ………. draw or paint at all when he was a boy, but now he is a famous artist.

7. After weeks of training, I ………. swim a length of the baths underwater.

8. It took a long time, but in the end Tony………. save enough to by his own car.

9. Did you buy any fresh fish in the market? – No, I ………. get any.

10. For days the rescuers looked for the lost climbers in the snow. On the fourth day they saw them and ………. reach them without too much trouble.

4. Supply suitable forms of to be able to in these sentences.

1. Our teacher says we will be able to speak English fluently in a few months.

2. I’ve been trying for hours, but so far I (not) ………. get through on the phone.

3. If he had asked me earlier, I ……… help him.

4. I’m sure she would have helped you if she ………… .

5. I think I ……….play table tennis better after a bit of practice.

6. He has managed to live in England for years without ……… speak English.

7. I’m practicing hard because I want to ………. pass my driving test first time.

8. If I ……… sing, I would have loved to be an opera singer.

5. Complete the sentences with must, mustn’t, needn’t.

Model: We haven’t got much time. We must hurry.

We’ve got plenty of time. We needn’t hurry.

1. ‘Do you want me to wait for you?’ ‘No, it’s okay. You ………. wait.’

2. Tom gave me letter to post. I ………. forget to post it.

3. You ………. come if you don’t want to but I hope you will.

4. ‘What sort of house do you want to buy? Something big?’ ‘Well, it ………. be big – that’s not important. But it ………. have a nice garden – it’s essential.’

5. We have enough food at home so we ………. go shopping today.

6. This book is very valuable. You ………. look after it very carefully and you ………. lose it.