Could 的用法

Could 的用法

1. can 的过去式,表示过去的可能性

2. 用于委婉征求对方的许可, 但答语要用can

3. 用于猜测句型中,[肯定句与否定句中, = can . +v(现在) / +have done (过去)]

4. 用于虚拟句中, 表示与事实相反或实现可能性不大的情况

Exercises:

1. ---______ I ask you something, if you are not too busy?

---Yes, of course you _____.

A. Can, could

B. Could, can

C. Should, should

D. Could, could

2. If it were not for the fact that you ____ sing, I would invite you to the party.

A. couldn’t

B. shouldn’t

C. can’t

D. might not

3. When he was young, his dream was to perform before great audiences, but he _____.

A. wouldn’t

B. needn’t

C. mustn’t

D. couldn’t

4. If I ____ plan to do anything I want to, I’d like to go to Europe and travel around.

A. had to

B. could

C. would

D. ought to

Answers: 1-5 BCDB