为什么 in the last few years 用完成时态一般都直接说它是标志词

Question

为什么 in the last few years 用完成时态
一般都直接说它是标志词

Answer 1

非常简单：
1 in the last few years ==since the last few years ago .又如：
He has lived there in the last five years
==He has lived there for 5 years.
==He has lived there since 5 years ago.
2 in the past-------用一般过去时
He lived here in the poast.