Question

these years用什么时态

Answer 1

these years，这些年，通常用于现在完成时态。也可以是一般现在时或者一般过去时。例如：
Even after all these years, I want to get better and better.
即使过了这么多年，我还是想变得越来越好。
After all these years, she still remembered.

过了这么多年，她还记得。
I wonder how Mary has kept her figure after all these years.
我想知道这么多年来玛丽是如何保持她的身材的。

Answer 2

这些年
一般用 一般现在时或常用现在进行时
Great changes in the city have taken place these years.
这些年这座城市发生了巨大改变。

Answer 3

一般现在时或者一般过去式(如果大背景就是过去话)
意为这几年