I don t think he could have done so much homework last night,did he?表推测的反意疑问句的问题..1.I don t think he could have done so much homework last night,did he?2.I don t think he could have done so much homework,has he?我知道第一

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I don t think he could have done so much homework last night,did he?表推测的反意疑问句的问题..1.I don t think he could have done so much homework last night,did he?2.I don t think he could have done so much homework,has he?我知道第一

I don t think he could have done so much homework last night,did he?表推测的反意疑问句的问题..1.I don t think he could have done so much homework last night,did he?2.I don t think he could have done so much homework,has he?我知道第一
I don t think he could have done so much homework last night,did he?表推测的反意疑问句的问题..
1.I don t think he could have done so much homework last night,did he?
2.I don t think he could have done so much homework,has he?
我知道第一句表示对过去事实的否定推测,所以用过去时,但是为什么第二句把last night去掉后就变成用has he了?

I don t think he could have done so much homework last night,did he?表推测的反意疑问句的问题..1.I don t think he could have done so much homework last night,did he?2.I don t think he could have done so much homework,has he?我知道第一
情态动词+have 过去分词 都表示对过去的事实进行推测,与表示过去时间的状语连用时,相当于一般过去时.如：You must have stayed very late last night,didn't you?
但是,不与过去时间连用时,则指过去的动作对现在产生影响,相当于现在完成时.如：
You must have seen the film Titannic,haven't you?你肯定看过电影泰坦尼克了,不是吗?(那我就不邀你去看了）

过去完成时

有明确时间的用过去时，没有明确时间，但已完成了，用过去完成时。

如果有明确的表示过去的时间状语，就按过去时理解，所以did he；否则按照完成时理解

i don't think he was i don't think so回答i don't think he was能用i don't think so instead吗 I don‘t think he is tall,_____?He doesn't think he is tall,_____? I don't ()with peter.I think he is wrong. I don't think he is right.为什么不能是 I think he isn't right. I don't think he is .能否说成I think he isn't . I don't think I don't think 是I don't think he looks like还是I don't think he look like?.是I don't think he looks like还是I don't think he look like?是He don't think I looks like还是He doesn't think I look like?请同时将有关于don't think的语法点说一下, 1.Cou you tell me__ at the meeting? Sorry,I don't know.I didn't go to the meeting that day.1.Cou you tell me__ at the meeting? Sorry,I don't know.I didn't go to the meeting that day. A.what he says B.what he said C.what did he sayc你看后面是过 i don't think he is a good student,_ I don't think he （是 know还是knows) I don't think he speak Japanese well对吗 he,will,I,don't,think,come(连词成句) I don’t think he’s so great中的 so he said,i don't think so.改间接引语 i don't think he will go there,_____ ____? I don't think he can （ ）at school. 关于否定前移 I don't think he like apples还是做成I don't think he likes apples