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Modal Verbs · Exercises

B1Intermediate practice

mustn’t vs don’t have to, had to, ought to and must be.

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What you’ll practise at B1

  • Modal + base form (no -s, no to)
  • Ability: can / could / be able to
  • Negatives: can’t, shouldn’t, don’t have to
  • Questions: Can I…? Do I have to…?
  • Permission: can / can’t / may
  • Advice: should / ought to / had better
  • Obligation: must / have to / had to
  • mustn’t or don’t have to?
  • Possibility: might / may / could
  • Deduction: must / might / can’t be

Need a refresher? Learn the modal verbs: rules, tables and audio examples.

Sample exercises

A taste of what’s inside. In practice mode every exercise is freshly generated.

  1. Is this sentence correct?

    You mustn't bring your laptops — there are computers in the room.

    Correct · Has a mistake

    Show answer

    You don't have to bring your laptops — there are computers in the room.

    “mustn't” should be “don't have to”. mustn’t = it isn’t allowed. don’t have to = it isn’t necessary (you can if you want). You don't have to bring your laptops — there are computers in the room.

  2. Write a modal verb. Meaning: maybe.

    The new student _____ call back later.

    Show answer

    The new student might call back later.

    might / may / could = maybe: it’s possible, but not certain. The new student might call back later.

  3. What does the sentence mean?

    You can't cross the road on a red light.

    It isn’t necessary, but you can if you want. · It isn’t allowed. · It’s necessary. · It’s allowed.

    Show answer

    You can't cross the road on a red light.

    mustn’t / can’t = it isn’t allowed.

  4. Complete the sentence. Meaning: maybe.

    It _____ be true.

    mustn't · must · can't · could

    Show answer

    It could be true.

    might / may / could = maybe: it’s possible, but not certain. It could be true.

  5. Put the words in order to make a question.

    languages / can / speak / Lily / three

    Show answer

    Can Lily speak three languages?

    Questions: put the modal before the subject — no do / does: Can Lily speak three languages?

  6. Complete the sentence. Meaning: maybe.

    My dad _____ take a taxi.

    must · mustn't · can't · may

    Show answer

    My dad may take a taxi.

    might / may / could = maybe: it’s possible, but not certain. My dad may take a taxi.