可用mustn't have done表示对过去的推测吗?若可以,那这个结构与can't have done有区别吗?可以的话,请提供相应的信息来源.本人不甚感激~

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可用mustn't have done表示对过去的推测吗?若可以,那这个结构与can't have done有区别吗?可以的话,请提供相应的信息来源.本人不甚感激~

可用mustn't have done表示对过去的推测吗?若可以,那这个结构与can't have done有区别吗?可以的话,请提供相应的信息来源.本人不甚感激~
可用mustn't have done表示对过去的推测吗?若可以,那这个结构与can't have done有区别吗?
可以的话,请提供相应的信息来源.本人不甚感激~

可用mustn't have done表示对过去的推测吗?若可以,那这个结构与can't have done有区别吗?可以的话,请提供相应的信息来源.本人不甚感激~
首先have done表示已经做过,这点就不用谈了.
can't have done 表示以前不可能做某事.
例句
---Where____Margaret have put the empty bottles?
---She________them away.They must be somewhere.
A.can;can't have thrown
B.must;must have thrown.
C.must;needn't
D.can;must throw
答案为A.第一个句子是一个疑问句而且表示可能性的推测,所以只能用情态动词can或could,第二句的答语表示对过去的推测,所以用can't have done.
请看常见的“情态动词 + have + 过去分词”的用法:
一、“must + have + 过去分词”表示对过去发生的事情或状态进行推测,语气比较坚定,通常只用于肯定句.如:
It must have rained last night,for the ground is wet.
You must have been mad to speak to the servant.
二、“can / could + have + 过去分词”表示对过去某种情况的怀疑或不确定.can和could一般用于否定句和疑问句,could的语气较can弱.如:
I didn't see her at the meeting this morning; she can't / couldn't have spoken at the meeting.
He can't have finished the work so soon.

不可以用mustn't have done表示对过去情况的否定推测,只能用can't have done
肯定则可以用must have done

mustn't have done和can't have done的区别最好有例子 可用mustn't have done表示对过去的推测吗?若可以,那这个结构与can't have done有区别吗?可以的话,请提供相应的信息来源.本人不甚感激~ 请问must的否定形式是不是不能表推测?有木有mustn't have done 滴形式?推测和虚拟是推测和虚拟到底是什神马?must have done 可以表推测,能表虚拟吗?偶乱了. can’t +have done It was ,I should say,very kind of you to come all the way to help them,but you ___.A.didnt have to B.wouldnt have doneC.mustnt have done D.mightnt have done It was very kind of you to do the washing?up,but you _______ it.a、mustn’t have done b、 wouldn’t have donec、 mightn’t have done d、 didn’t have to do为什么? You don`t have to leave yet.There is an all-night bus.全句翻译成中文.don`t have to 可用mustn`t代替吗?为什么 13.You _________in such a hurry just now.Look,there is plenty of time left.A.don't have to do it B.needn't have done it C.wouldn't do it D.mustn't have done it --Catharine,I have cleaned the room for you.--- Thanks.You ________ it.I could manage it myself.A needn’t do B.needn’t have done C.mustn’t do D.shouldn’t have done为何不选A He must have been punished yesterday by his parents for what he had done.___ he?A,mustn't B.wasn't C.didn't D.needn't i got up early that morning,but i__so because i had no work to do.A.mustn't have done B.didn't need to do C.needn't have done D.must have to studyB为什么不对 It was very kind of you to do the washing-up but you _____ itA. needn’t do B. shouldn’t do C. mustn’t have done D. needn’t have done should have done ,shouldn't have done.could have done,couldn't have done 1.I must have done something wrong,___?A.hasn't I B.haven't I C.mustn't I D.didn't I2.I must have done something wrong yesterday,___?A.hasn't I B.haven't I C.mustn't I D.didn't I 1 wish I __to repair the bike .I only made it worsea)did not try B)wouldn't try c) had not tried d) wouldn't have tried 2 she__it ,beacuse she was not on the spot thena)shouldn't have done b) wouldn't have done c)mustn't have done d)couldn't have don Thanks.You ______ it.I could manage it myself A.needn’t doB.needn’t have done C.mus...Thanks.You ______ it.I could manage it myself A.needn’t doB.needn’t have done C.mustn’t do D.shouldn’t have done中B和D有什么区别?Catherine,I have I come all the way to say 3Q for your help and we ( )it without you.是情态动词+have done 为什么不可以添mustn‘t have done和shouldn't have done而必须添couldn’t have done 区别shouldn't have done 和 needn't have done