Complete the following sentences using appropriate modal auxiliary verbs.
1. Don’t call them now. They …………………………….. have gone.
a) can
b) may
c) either could be used here
2. ‘Could I ask you something?’ ‘Yes, of course you ……………………………..’
a) can
b) could
c) either could be used here
3. ‘Where is Sarah?’ ‘She …………………………………. have gone swimming.’
a) can
b) could
c) either could be used here
4. …………………………….. you smoke in public places?
a) can
b) may
c) either could be used here
5. Yesterday evening, I …………………………….. to watch TV for an hour.
a) was allowed
b) could
c) either could be used here
6. We ……………………………. go camping this summer.
a) may
b) can
c) either could be used here
7. You ………………………….. worry about the consequences.
a) don’t must
b) must not
c) either could be used here
8. …………………………….. you have some more potatoes?
a) will
b) shall
c) either could be used here
9. British people ……………………………….. get a visa to go to Scotland.
a) must not
b) don’t need to
c) either could be used here
10. I couldn’t think properly. Perhaps I ……………………………. Ill.
a) was
b) might be
c) either could be used here
Answers
1. They may have gone.
2. Yes, of course you can.
3. She could have gone swimming.
4. Can you smoke in public spaces?
5. Yesterday evening, I was allowed to watch TV for an hour.
6. We may go camping this summer.
7. You must not worry about the consequences.
8. Will you have some more potatoes?
9. British people don’t need to get a visa to go to Scotland.
10. I couldn’t think properly. Perhaps I was ill.
