Question

in the past three years是用过去完成时还是现在完成时？

Answer 1

要结合语境，看动作的发生是对过去造成影响还是对现在造成影响，如果是前者就用过去完成时，后者的话就用现在完成时

Answer 2

现在完成时。in the past是过去时，in the past +一段时间是完成时。
Tom went home in the past.
We have seen him 3 times in the past 3 years.

追问

老师说有的情况还可以是过去完成时，要看语境，举个例子

追答

初中还学过去完成时吗？例子倒是有的。
They had read 10 books in the past 4 months.
We had visited many places of interest in the past 3 years.

Answer 3

用过去时 .

Answer 4

再过去的三年时间里，用过去完成时

Answer 5

现在完成时吧