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新编英语语法教程（第
6 版）第 18 讲 练习参考答案
Ex. 18A
needn ’(=t don ’ havet to, don ’ needt to,
a) 1. haven ’got to)
won’ thave didn ’havet ’needt to) needn ’tdidn ’ha
2. to 3. to (= didn 4. 5. vet t o
7
didn ’haveneedn ’t8. won’
6. t to . needn ’t9. thave to 10. needn ’t
11.
had to 12. He wasn’ He wasn’ to ? 14. You had
b) You 13. to ? ? to ?
said I wasn’ to ? 16. They had to ? 17. We had I wasn’
15. He to ? 18. t o
?
said you weren ’to ?
19. He 20. We had to ? Ex. 18B
1. He may be doing his homework.
2. She may have forgotten to call me back. 3. Could you lend me 5 pounds until tomorrow? 4. I wonder if I could leave now. 5. It might rain this evening.
6. Old Tom might have left San Diego. 7. If it should rain tomorrow, 8. You should do as he says.
9. If you should change your mind, please let me know. 10. I ’ msurprised that he should have an accident. 11. Shall I go with you?
12. You shan ’answert her back again.
13. You mustn ’violate the traffic regulations again. 14. He must have got lost in the mountains. 15. You needn ’got and see him.
16. You needn ’havet written to her. 17. You should have helped her.
18. If you would change this car, I should be very grateful. 19. Would you mind shutting the door? 20. She shouldn ’havet bought that house. 21. It ’odds that she should say that.
22. Don’ tcall him. He’ ll be taking a nap.
the football match would be put off.
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23. Don’ twrite to him. He won’ tbe home now. 24. Don’ tbother him. He will have heard the news. 25. A lion will attack people only when hungry. 26. What will you do after graduation? 27. Mary ought to be home by now. 28. You oughtn ’to have bought a new car.
29. He used to work in Shanghai, but now he is nowhere to be found. 30. How dare you say that in the presence of the principal?
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