作业帮The teacher with 3 students( )an experiment last night.They
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The teacher with 3 students( )an experiment last night.They haven't finish it yet.
A.was doing B.have done C.has done D.did
请告诉我这道题有什么语法,什么是重点 .我是一个英语特别特别差的人,请尽可能的讲详细.thank you!
A.was doing B.have done C.has done D.did
请告诉我这道题有什么语法,什么是重点 .我是一个英语特别特别差的人,请尽可能的讲详细.thank you!
A
过去进行时,到目前还在进行中
再问： 能够进一步说说吗？
再答： 你知道他们在做实验的时候他们就正在做实验了,所以是过去某个时候开始进行而且一直持续到现在还没有完成
再问： 后面那里是什么意思。 they haven't finish it yet。
再答： 他们到现在还没有做完实验.
过去进行时,到目前还在进行中
再问： 能够进一步说说吗？
再答： 你知道他们在做实验的时候他们就正在做实验了,所以是过去某个时候开始进行而且一直持续到现在还没有完成
再问： 后面那里是什么意思。 they haven't finish it yet。
再答： 他们到现在还没有做完实验.
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