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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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】?
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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!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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