Exercise on Modal Verbs and their Substitutes

Choose the correct substitute for each modal verb.

1. We ought to win the race. → We (are able to, are allowed to, are

supposed to) win the race. 2. I can swim. → I (have to, am able to, am supposed to)

swim. 3. You must meet my best friend. → You (have to, are able to, are allowed to)

meet my best friend. 4. He should be in bed by now. → He (has to, is supposed to, is allowed to) be

in bed by now. 5. I must get up early. → I (have to, am able to, am allowed to) get up

early.

6. They may stay up late. → They (have to, are allowed to, are supposed

to) stay up late. 7. She needs to see the doctor. → She (has to, is allowed to, is able to) see the

doctor. 8. We need not walk. → We (do have to, are not able to, are not

supposed to) walk. 9. You must not sleep → You (do not have to, are not allowed to, are not

able to) sleep. 10. Should I go to the cinema with them? → (Am I able to, Am I allowed to, Am I supposed

to) go to the cinema with them?