Modal Verbs

1. Modal Verbs

2. 1 can / could 1) He can speak French. When he was young, he could sing very well. can / be able to Last night, the fire spread through the hotel very quickly but everyone ___________ get out. was able to 2)Could you please……? Boys can’t wear long hair in our class. 3) How can you be so rude? 4) Anyone can make mistakes.

3. 5 )Can this news be true? This can’t be * * . She is in the office. 2 may / might 1) ---May I use your pen? ---- yes, you may. ---No, you mustn’t. 2)It may/ might rain tomorrow. 3)May all your dreams come true. 4) may (might) as well do= had better do最好 There is nothing to do ,so I may as well go to bed.

4. 3 must/ have to 1)We must work hard. We have to be here before 7:30. 2)must----mustn’t ---- needn’t -Must I water the flowers? -yes, you must. -No, you needn’t/ don’t’ have to. 3)must+ v He must be at the library. can’t+ v

5. 4 dare 1情态动词 dare- dared daren’t Dare he do it ? He dare not do it. 2) 实义动词 dare to do She dared to walk at night. She didn’t dare (to)… 3) I dare say 5 need 1) You needn’t call him. 2) – Need I come? -- Yes, you must. -- No, you needn’t/don’t have to. 3) 实义动词 (sb) need to do (sth) need to be done doing

6. 6 will / would 1) Would you pass me the book? 2) I will never do that again. 3) This will be the house we are looking for. 4) Fish will die out of water. He would get up early when he lived in the country. would/ used to ①used to可以表示过去的动作，现在已经不存在。Would 常与表示过去的时间连用。 ②used to可以表示过去的状态 I used to get up early. He used to be a quiet boy.

7. 7 shall / should/ ought to shall • 1）What shall we do now？ • Shall she come right now? 在疑问句中，shall用于1，3 人称，表示--------- 2）You shall do as your father says. He shall be punished.(威胁） He shall have the book when I finish reading.( 允诺） 陈述句中，shall用于2，3 人称，表-------------

8. should 1) They should arrive at 7:30 It is nearly 7 o’clock. He should be here at any moment. 2) You won’t believe he should be so rude! How should I know? 惊讶，“竟然会” ３) If you should change your mind, please let me know. ought to They should/ought to arrive at 7:30 ought not to/ oughtn’t to

9. 1.--Excuse me, but I want to use your computer to type a report. --You ____ have my computer if you don’t take care of it. A. shan’t B. might not C. needn’t D. shouldn’t A 2. ---When can I come for the photos ? I need them tomorrow afternoon. ---They _____be ready by 12 : 00 . A. can B. should C. might D. need B 3. One ought ____ for what one hasn’t done. A. not to be punished B. to not be punished C. To not punished D. not be punished A

10. 情态动词＋have done She might have gone to Shanghai. It must have rained last night. It can’t have rained last night. You needn’t have waited for me. You should have started earlier. You ought to have helped him. can’t /couldn’t have done could have done may/might have done must have done needn’t have done should/ ought to have done

11. D • With so much work on hand, you ____to see the game last night. • A. mustn’t go B. could have gone • C. shouldn’t go D. shouldn’t have gone D 2. There was plenty of time. She ____. A. mustn’t have hurried B. couldn’t have hurried C. must not hurry D. needn’t have hurried 3. A computer ____ think for itself; it must be told what to do. A. can’t B. couldn’t C. may not D. might not A

12. 情态动词表示推测的用法 1 对现在情况的推测 肯定 must, may, might be 否定 can, could not be 疑问 can, could be? 2 对过去事实的推测 肯定 must/ may/ might have done 否定 can, could not have done 疑问 can, could have done 虚拟 would/ could / should/ might/ ..have done