本能够
could have done什么意思
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相关问题
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could not have done是什么意思?
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could have done 的意思
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should have done ;could have done; might have done 有什么区别
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can have done和 could have done有什么区别?
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should have done;must have done;need have done;could have do
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should have done ,shouldn't have done.could have done,couldn
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情态动词+have done 如 could have done,must have done,should have
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could have done 和 might have done 的区别?
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could never have done
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这里的could never have done表示什么