Grammar Exercise - Modals of prohibition and lack of necessity (mustn't or needn't)

Do the exercise below on modals of prohibition and lack of necessity (mustn't or needn't) and click on the button to check your answers.

(Before doing the exercises you may want to read the lessons on modals and present and past modals )

Choose the correct answer (mustn't or needn't)

  1. Nancy go to bed early; tomorrow is her day off.
  2. You smoke on buses. It's forbidden.
  3. You do it now; you can finish it later.
  4. Students use their mobile phones during the lessons.
  5. You buy any meat. There is plenty of it in the fridge.
  6. You bring a suim suit. I can lend you one.
  7. It's a secret. You tell anybody.
  8. You do the washing up; we have a dishwasher.
  9. You really be late again.
  10. You drink at all if you plan to drive.

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