Exercise on Modal Verbs and their Substitutes

Use modal verbs where possible. If a modal verb can't be used with a certain tense, use its substitute.

  1. You (must) get up early tomorrow.
  2. You (not / need) call a baby sitter.
  3. We (may) watch the film tonight.
  4. He (not / can) see me yesterday.
  5. She (must) stay at school yesterday afternoon.
  6. (may / you) go to the disco yesterday?
  7. He (not / must) sleep now.
  8. You (not / need) answer.
  9. He (ought to) give evidence at the court yesterday.
  10. Since he bought the new car he (not / can) sleep.