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主题:
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4 can 和be able to 的区别? |
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内容:
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4 can 和be able to 的区别? |
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提交人:
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tch_1
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时间:
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5/27/2002 14:5:25
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主题:
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4 can 和be able to 的区别 |
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内容:
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4 can 和be able to 的区别
1.be able to 能够表达can所不能表达的时态,如将来时和完成时.例如:
If you travel in almost any other country in the world, you will still be able to use English.
2.be able to 后通常接主动语态的不定式而不接被动语态的不定式,而CAN后接主动或被动语态的不定式都可以。如不能说:
The patient has been able to be operated on.
但是可以说 The patient can be operated on.
3.be able to 用于过去的时态的时候强调的是经过努力而作成某件事情,而COULD就不能表达这个意思
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提交人:
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tchchenb
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时间:
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5/27/2002 14:5:26
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