this was the third time they()china.为什么括号中填had visited,this+be+the firsttime后面都要用完成时吗?为什么?

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this was the third time they()china.为什么括号中填had visited,this+be+the firsttime后面都要用完成时吗?为什么?

this was the third time they()china.为什么括号中填had visited,this+be+the firsttime后面都要用完成时吗?为什么?
this was the third time they()china.为什么括号中填had visited,this+be+the first
time后面都要用完成时吗?为什么?

this was the third time they()china.为什么括号中填had visited,this+be+the firsttime后面都要用完成时吗?为什么?
是的.不为什么,记住就是.学语言最忌讳追根溯源了.结果语言没学会,考古没成功 :)
当然要是已经做过的事,如果没做还得用别的时态,如:
This is the first time I shall visit the city.
=This is the first time for me to visit the city.
如果已经做了,不可用一般过去时,而应该是完成式,前面是is的话,用现在完成时,是was便用过去完成时
如:This is the 2nd time I have seen the film.
请在客户端右上角评价点“满意”即可

记住就OK.
this /it is the +序数词+time+从句。(从句用现在完成)
this/ it was the+序数词+time+从句。(从句用过去完成)

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