can't be和can't have done

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can't be和can't have done
can't be和can't have done

can't be和can't have done
两者都表示推测,但不同的是对推测的时间有所限制.
can't be/do 表示对现在的推测,例如：I saw Lily just now.It can't be true,she has gone to Beijing yesterday.
can't have done 则是对过去状态的推测.
这方面的推测你可以重点复习情态动词,一般语法书都有.希望满意哈!

cannot be 是不可能。。。的意思
后者是对已经发生过的动作的否定判断，前者是对现在情况的判断。

前面个是can't do吧，就是，不能做的意思
后面个是，本不能做，但实际上已经做了的意思

can't be 是表示不可能是，对现在情况的否定猜测。
can't have done 是对过去情况的猜测，表示不可能做过什么。

can't be和can't have done can’t / couldn’t have can’t +have done 英语翻译can‘t be can't be用法 can‘t be 和mustn’t be的用法 musn't be 和can't be的区别 can,can't,must,mustn't,needn't,be allowed to,have to,don't have to的区别 you can't be friends It Can't Be 歌词 Why Can't I Be File can't be found! Love can't be compelled~ Sorry I can't be ‘’Can't be poened‘’是什么意思? won' be和can't be的区别➕例子 be,must be,can't have been,must have been吗有can't be那么有没有mustn't be 和may not be