摘要： can 1) 表示能力.could主要指过去时间.例如: ① Two eyes can see more than one. 两只眼比一只眼看得清. ② Could the girl read before she went to school? 这女孩上学前能识字吗? 2) 表示可能.例如:~,> K ① He can’t have enough money for a new car. 他不可能有足够的钱买新车. ② You mustn’t smoke while you’re walking around in the wood. You could start a fire. 在林子里走时勿吸烟.那样可能会引起火灾. 3) 表示允许.例如: ① Can I have a look at your new pen? 我可以看一看你的新钢笔吗? ② He asked whether he could take the book out of the reading-room. 他问他可不可以把书带出阅览室. 4) 表惊异.怀疑.不相信等态度.主要用于否定句.疑问句或感叹句中.例如: ① Where can they have gone to? 他们会去哪儿了呢? ② How can you be so careless? 你怎么这么粗心? 5) 比较委婉客气地提出问题或陈述看法.例如: ① Can you lend me a hand? 帮我一把好吗?. ② I’m afraid we couldn’t give you an answer today. 恐怕我们今天不能给你答复.
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---Who can it be that hasn’t handed in his composition?
---It ______ be Robinson. He ______ it in yesterday.
|
A．will; should hand |
B．must; should have handed |
|
C．may; can’t hand |
D．can; could have handed |
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---Who can it be that hasn’t handed in his composition?
---It ______ be Robinson. He ______ it in yesterday.
|
A．will; should hand |
B．must; should have handed |
|
C．may; can’t hand |
D．can; could have handed |
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— _______ I ask you something, if you are not busy?
—Yes, of course you _______.
A. Should; should B. Could; can
C. Could; could D. Can; Could
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