为什么 in the last few years 用完成时态
问题描述：
为什么 in the last few years 用完成时态
一般都直接说它是标志词
答
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--...