Exercise on Modal Verbs and their Substitutes

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Exercise on Modal Verbs and their Substitutes
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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.

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• 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?