Modal Verbs of Obligation 1 - Perfect English Grammar

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<strong>Modal</strong>s <strong>of</strong> <strong>Obligation</strong> 1<br />

Put in ‘mustn’t’ or ‘don’t / doesn’t have to’:<br />

1. We have a lot <strong>of</strong> work tomorrow. You _______________ be late.<br />

2. You _______________ tell anyone what I just told you. It’s a secret.<br />

3. The museum is free. You _______________ pay to get in.<br />

4. Children _______________ tell lies. It’s very naughty.<br />

5. John’s a millionaire. He _______________ go to work.<br />

6. I _______________ do my washing, because my mother does it for me.<br />

7. We _______________ rush. We’ve got plenty <strong>of</strong> time.<br />

8. You _______________ smoke inside the school.<br />

9. You can borrow my new dress but you _______________ get it dirty.<br />

10. We _______________ miss the train, it’s the last one tonight.<br />

11. She _______________ do this work today, because she can do it tomorrow.<br />

12. I _______________ clean the floor today because I cleaned it yesterday.<br />

13. We _______________ forget to lock all the doors before we leave.<br />

14. We _______________ stay in a hotel in London, we can stay with my brother.<br />

15. I _______________ spend too much money today. I’ve only got a little left.<br />

16. They _______________ get up early today, because it’s Sunday.<br />

17. I _______________ eat too much cake, or I’ll get fat!<br />

18. We _______________ be late for the exam.<br />

19. You _______________ tidy up now. I’ll do it later.<br />

20. He _______________ cook tonight because he’s going to a restaurant.

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Answers:<br />

1. We have a lot <strong>of</strong> work tomorrow. You mustn’t be late.<br />

2. You mustn’t tell anyone what I just told you. It’s a secret.<br />

3. The museum is free. You don’t have to pay to get in.<br />

4. Children mustn’t tell lies. It’s very naughty.<br />

5. John’s a millionaire. He doesn’t have to go to work.<br />

6. I don’t have to do my washing, because my mother does it for me.<br />

7. We don’t have to rush. We’ve got plenty <strong>of</strong> time.<br />

8. You mustn’t smoke inside the school.<br />

9. You can borrow my new dress but you mustn’t get it dirty.<br />

10. We mustn’t miss the train, it’s the last one tonight.<br />

11. She doesn’t have to do this work today, because she can do it tomorrow.<br />

12. I don’t have to clean the floor today because I cleaned it yesterday.<br />

13. We mustn’t forget to lock all the doors before we leave.<br />

14. We don’t have to stay in a hotel in London, we can stay with my brother.<br />

15. I mustn’t spend too much money today. I’ve only got a little left.<br />

16. They don’t have to get up early today, because it’s Sunday.<br />

17. I mustn’t eat too much cake, or I’ll get fat!<br />

18. We mustn’t be late for the exam.<br />

19. You tidy up now. I’ll do it later.<br />

20. He doesn’t have to cook tonight because he’s going to a restaurant.