模块四 Module IV Modern life《Grammar and usage(2)： Modal verbs： comparisons》集体备课教案设计

模块四 Module IV Modern life《Grammar and usage(2)： Modal verbs： comparisons》集体备课教案优质课下载

I. 表示能力: can/could/ be able to

can/could只能表示现在或过去的能力, 而 be able to 则能用于各种时态。且在肯定句中could不可以用来表示过去某一特定场合的能力，而要用was/were able to。

1. A computer ______ think for itself; it must be told what to do.

A. can’t B. couldn’t C. may not D. might not

2. The fire spread through the hotel very quickly but everyone ______ get out.

A. had to B. would C. could D. was able to

II. 表示许可: may / might, can / could

在问句中，表示征询对方意见或请求时用“could...? 或might...? ” 以使语气委婉客气，但回答一定要用can或may。(mustn’t 表示禁止，不许可)

1. ——Could I borrow your dictionary? ——Yes, of course you _______.

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

2. ——May I pick a flower in the garden?

——________.

A. No, you needn’t B. Not, please. C. No, you mustn’t D. No, you won’t

III. 表示推断或判断: can/may/must

1. 在肯定句中都可以用来表示可能。must语气最肯定；may表示事实上的可能；can表示逻辑上的可能，常译成“有时会......”。

2. 在否定句中只能用can和may。can’t译为“不可能......”；may not译为“可能不......”。

3. 在疑问句中只能用can。

Practice (I) Multiple-choices.

1. I thought you _______like something to read, so I have brought you some books.

A. may B. might C. would D. must

2. I didn’t hear the phone. I _______asleep.

A. must be B. must have been C. should be D. should have been

3. —— There were already five people in the car, but they managed to take me as well.

—— It _______a comfortable journey.

A. can’t be B. shouldn’t be C. mustn’t have been D. couldn’t have been