he must have done it yesteraday,――?he must have done it for 2 years ――?he must have done it yesteraday,――?he must have done it for 2 years ――?he must have been here yesterday――?he must have been here for 2 years――?这几个反

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hemusthavedoneityesteraday,――?hemusthavedoneitfor2years――?hemusthavedoneityesteraday,――?hemusthavedo

he must have done it yesteraday,――?he must have done it for 2 years ――?he must have done it yesteraday,――?he must have done it for 2 years ――?he must have been here yesterday――?he must have been here for 2 years――?这几个反
he must have done it yesteraday,――?he must have done it for 2 years ――?
he must have done it yesteraday,――?he must have done it for 2 years ――?he must have been here yesterday――?he must have been here for 2 years――?这几个反义疑问句题咋做,顺边讲解下,

he must have done it yesteraday,――?he must have done it for 2 years ――?he must have done it yesteraday,――?he must have done it for 2 years ――?he must have been here yesterday――?he must have been here for 2 years――?这几个反
he must have done it yesteraday,【didn't he】?
he must have done it for 2 years,【hasn't he】?
he must have been here yesterday,【wasn't he】?
he must have been here for 2 years,【hasn't he】?

教你一个方法, 用I am sure 这个插入语代替表推测的情态动词, 一下就看出来了.

如:
he must have done it yesteraday,【didn't he】?
---he , I am sure , did it yesteraday,【didn't he】?
注意: 这里由于有过去时间状语yesterday, 只能改为一般过去时

he must have done it for 2 years,【hasn't he】?
---he , I am sure, has done it for 2 years,【hasn't he】?

he must have been here yesterday,【wasn't he】?
---he, I am sure,was here yesterday,【wasn't he】?
注意: 这里由于有过去时间状语yesterday, 只能改为一般过去时

he must have been here for 2 years,【hasn't he】?
---he, I am sure,has been here yesterday,【hasn't he】?

在听我讲吗?

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祝学习进步

说明:关键是看有没有时间状语提示,如果有过去时间状语的话,那就用过去式,如果没有,那就是现在完成时,
1.didn't he
2.hasn't he
3.wasn't he
4.hasn't he
亲:祝你学习进步!望采纳,谢谢!为何 第一个用do的过去式第三个用was的过去式没有采纳也给你回答啊!第一个是行动动词done,第三个是系动词been。回答简洁...

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说明:关键是看有没有时间状语提示,如果有过去时间状语的话,那就用过去式,如果没有,那就是现在完成时,
1.didn't he
2.hasn't he
3.wasn't he
4.hasn't he
亲:祝你学习进步!望采纳,谢谢!

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he must have done it yesteraday,――?he must have done it for 2 years ――?he must have done it yesteraday,――?he must have done it for 2 years ――?he must have been here yesterday――?he must have been here for 2 years――?这几个反 he must have done it yesteraday,――?he must have done it for 2 years ――?he must have done it yesteraday,――?he must have done it for 2 years ――?he must have been here yesterday――?he must have been here for 2 years――?这几个反 He must have done nothing but ____ He must have done it last night,____he 这个反意疑问句怎么做啊 must have been done must have done must+have done 句型must+have done 表对过去发生事情有把握推测.但是可不可以用must +be 这样的句子来表示?比如说 He must have made it for you.可以变成 He must be made it for you 另外 疑问否定中的can't/could What a pity! Considering his ability and experience, he _____ better. A. need have done B. must have done C. can have done D. might have done what a pity considering his ability and experience ,he _betterA,need have done B,must have done C,can have done D,might have done that must have done the 用can't have been/done must have been /done 改写句子例:I don't believe he did it 答:He can't have done it问:I don't believe you tried very hardI think he passed all the examsI don't bellieve you were at the office on SuadayI think she met 用(can't ) ( have been/done ) (must have been /done) 改写句子例:I don't believe he did it 答:He can't have done it问:I don't believe you tried very hardI think he passed all the examsI don't bellieve you were at the office on 用(can't ) ( have been/done ) (must have been /done) 改写句子例:I don't believe he did it 答:He can't have done it问:I don't believe you tried very hardI think he passed all the examsI don't bellieve you were at the office on He will have to stay in hospital.That’s what he____a has done b must do c must be doing d must have done为什么C不对呢 must be must have done 区别 what a pity considering his ability and experience,he ( )better.A.need have done B.mA.need have done B.must have done C.can have done D.might have done为什么不选C啊 给我讲讲吧 must have been done/must be done求解两者异同 must be done和 must have done区别 is it he must have fallen or he must have fell?whythank you