This is the first time I have seen this kind of refrigerrator.为什么用的是have seen？

Question

如题所述

Answer 1

This is the first time I have seen ..这是一个固定句式，This is the first time说明这是我第一次...是以前没有见过的，have seen表明是现在完成时，说明是过去的时候到现在为止（表示时间的一种状态），都没有见过，是第一次见，所以用have seen。

Answer 2

此为固定句型：This is the first (second,third......) time that .....have done......That was the first (second,third......) time that .....had done......注意黑体部分。

Answer 3

句型it is the ...time (that ) sb have done sth.这已经是某人第几次做某事了

Answer 4

the first time得用完成时