can’t +have done
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can’t +have done
can’t +have done
can’t +have done
表否定的现在完成时推测
不能被完成
过去不可能做过某事
表示不能做却作了,是虚拟语气
can't have 应该没有, 不可能有
he can't have drawn that - 那不可能是他画的
表示对过去的否定
can’t +have done
musn't have done can't have done用法区别
can't have done 的用法
can't be和can't have done
must have done,must do,can't have done,can't do的区别
can have done和could have done有无区别?can't have done和couldn't have done有无区别?如果有,区别是什么?
mustn't have done和can't have done的区别最好有例子
could't have done和can't have done的区别
can't be done.should be done.should have done什么意思哈..
can have done could have done should have done should to do shouldn't have done shouldn't to do还有needn't have doneneedn't domustn't have donemay not have donemight not have done
用must have been/done或can*t have been/done 改写句子
can't have been和can' have done有什么区别或者must have been和must hane done;may have been和may have done
情态动词+have donemust have done/can't have doneshould have done/shouldn't have doneneed have done/needn't have donemay(might) have done/haven't donecould have done/couldn't have donewould have done/wouldn't have done如何用?我这样分正
有没有can have done sth?could have done sth有两种意思吗?can't/couldn't have done sth意思又是什么能不能举几个例子?
should have done ,shouldn't have done.could have done,couldn't have done
I couldn’t have hoped for a better outcome什么意思,另外can't have done和couldn't have done什么区别
区别shouldn't have done 和 needn't have done
can have done和 could have done有什么区别?那can have done什么用法?