--- No, they can’t have finished the work so soon.

--- Then they must have played so much.

May /might 用于肯定句中(可能，或许，大概);用于否定句中(可能不)。表示可能性较小的一种推测

can 表示推测时，只用于否定句和疑问句中

【合作探究】：I. 单项填空：1. Write in simple English in order that everybody ______ understand

you. A. may B. must C. should D. will

2. You _______ miss the lecture, though you ______ have it.

A. mustn’t; needn’t B. needn’t; mustn’t C. mustn’t; mustn’t D. can’t;

needn’t

3. --- Better not have the operation right now.

--- ________. A. I mustn’t B. I shouldn’t C. I won’t D. I can’t

4. The train was ten minutes late, so I ______ have run all the way from my house to the station.

A. couldn’t B. shouldn’t C. needn’t D. mustn’t

5. I’m not going simply because I don’t see why I _______.

A. will B. would C. should D. shall

6. --- It must be Mr. Li who did it.

--- No, it _____ be Mr. Li.

A. mustn’t B. can’t C. wouldn’t D. may

7. --- It’s getting cloudier and cloudier.

--- Yes, I’m afraid it ______ be raining soon.

A. must B. should C. might D. can

8. I promised to get there before 5 o’clock, but now the rain is pouring

down. They _____ for me impatiently.

A. mat wait B. ought to wait C. could wait D. must be waiting

9. --- ______ you make so much noise?

--- Sorry, I’ll take care not to.

A. Must; B. Can C. May D. Would

10. On Sundays when I was a child, Father and I _____ get up early and go fishing.

A. could B. would C. might D. should

11.I ______ have written to him because he phoned me shortly afterwards

A. ought to B. must C. couldn’t D. needn’t

12. --- _____ the plane have taken off on time?

--- I’m afraid not. The fog was too thick then.

A. Need B. Should C. Can D. Must

13. This looks like a different kind of stone. What _____ we do with it?

A. will B. shall C. would D. do

14. He has much money at the beginning of every month, but by the end of it he _____ little left.

A. can have B. will have C. should have D. need have

15. How _______ you say that you really understand the whole story if you have finished only part of the article?

A. must B. need C. may D. can

【当堂检测】II. 用适当的情态动词填空：

1. There is 20 minutes left. We _______ (not) have to be in such a hurry.

2. Where is my watch? I really can’t find it. Where _____ it be?

3. The doctor told the old man that he ______ avoid eating fat.

4. It’s too late. I think he ______ go to bed.

5. ______ you mind my troubling you with a few questions?

第5课时

【自主学习】

I. 单词拼写

1.Tom celebrated the a_________(到达)of the New Year with a party for his friends.

2. Getting food to s__________(挨饿的) people does nothing to stop the war.

3. We just can’t find enough good second-hand cars to s__________(满足) demands.

4. The fruit was often served at wedding f__________(盛宴).

5. Is Russia a E_______(欧洲) country or Asian country? Many people are puzzled sometimes.

6. Carolina was a__________ (奖励)the prize for both films.

7. No one is to see the document without the p__________ (许可)of the writer of the report.

8. I’ve made up my mind, but it’s o_______(显而易见)that you need more time to think it over.

9. Dolphins have sometimes been known to save d__________ (快要溺死)swimmers.

10. I used to a__________ (羡慕)him as a true scientist and hard worker.

II. 短语翻译

1. 出现______________________ 2. 饿死 ____________________

3. 对…满足___________________ 4. 导致 ____________________