II. Underline the correct word or phrase in each sentence.
15. Look at those clouds. I think it can / might / must rain.
16. This is impossible! It can’t be / mustn’t be / may not be the answer.
17. Well done! You may be / must be / might be very pleased!
18. I’ve no idea where Jane is. She could be / must be anywhere!
19. I suppose it’s possible. I might / can / must come to your party.
20. I’m not sure. I must not / may not be able to get there in time.
21. That can’t be / mustn’t be / may not be David. He hasn’t got a bike.
22. Lisa isn’t here yet. She can be / must be on her way.
23. There’s someone at the door. It can be / could be the postman.
24.
III. Rewrite each sentence so that it has a similar meaning and contains the word in bold.
25. It would be a good idea for you to see a dentist. ought
You ought to see a dentist.
26. It’s not necessary for us to go to school tomorrow. have
We have to go to school tomorrow. 
27. I’m sure that isn’t John, because he’s in Paris. be
That is impossible that is John because he’s in Paris.
28. Perhaps Ann is at home. be
Ann may be at home.
29. You ought to wear a warm coat today. had
You had better wear a warm coat today.
30. It’s possible that I’ll be late. may
I may be late.
31. I wouldn’t go skiing if I were you. think
I don’t think you should go skiing.
32. It is forbidden to leave your bike here. can’t

You can't leave your bike here.
You Sorry, I can’t come / may not come out tonight. I have to do my homework.
IV. Complete each sentence with one suitable modal auxiliary.
1. Soldiers … have … to obey orders.
33. I think you …………………should…………….. take your umbrella.
34. Sorry, I ………must……………………….. go now. I don’t want to be late.
35. I’m not sure, but I ………………may……………….. be able to help you.
36. Francesca isn’t at home, so she ………………must……………….. be on her way here.
37. We ………………had……………….. better not leave any windows open.
38. It ………………must……………….. be a star, it’s too bright. Perhaps it’s an alien spaceship!
39. I don’t ………………need……………….. to go to work today. It’s a holiday.
40. Sorry, but I wasn’t ……………able………………….. to finish all the work you gave me.
41. I think you …………need…………………….. to ask your teacher for some advice.

#NOCOPY

II

15. Look at those clouds. I think it can / might / must rain.
16. This is impossible! It can’t be / mustn’t be / may not be the answer.
17. Well done! You may be / must be / might be very pleased!
18. I’ve no idea where Jane is. She could be / must be anywhere!
19. I suppose it’s possible. I might / can / must come to your party.
20. I’m not sure. I must not / may not be able to get there in time.
21. That can’t be / mustn’t be / may not be David. He hasn’t got a bike.
22. Lisa isn’t here yet. She can be / must be on her way.
23. There’s someone at the door. It can be / could be the postman.
24.
III
25. It would be a good idea for you to see a dentist. ought
⇒You ought to see a dentist.
26. It’s not necessary for us to go to school tomorrow. have
⇒We have to go to school tomorrow. 
27. I’m sure that isn’t John, because he’s in Paris. be
⇒That is impossible that is John because he’s in Paris.
28. Perhaps Ann is at home. be
⇒Ann may be at home.
29. You ought to wear a warm coat today. had
⇒You had better wear a warm coat today.
30. It’s possible that I’ll be late. may
⇒I may be late.
31. I wouldn’t go skiing if I were you. think
⇒I don’t think you should go skiing.
32. It is forbidden to leave your bike here. can’t

⇒You can't leave your bike here.
You Sorry, I can’t come / may not come out tonight. I have to do my homework.
IV
1. Soldiers have to obey orders.
33. I think you should take your umbrella.
34. Sorry, I must  go now. I don’t want to be late.
35. I’m not sure, but I  may be able to help you.
36. Francesca isn’t at home, so she must  be on her way here.
37. We had  better not leave any windows open.
38. It must  be a star, it’s too bright. Perhaps it’s an alien spaceship!
39. I don’t  need  to go to work today. It’s a holiday.
40. Sorry, but I wasn’t able  to finish all the work you gave me.
41. I think you  need to ask your teacher for some advice.