during the past several years引发的疑问?

来源：学生作业帮编辑：百度作业网作业帮分类：英语作业时间：2024/04/30 19:18:43

图片下的第一句话,during the past several years不是要用现在完成时吗?
然后一般用英语描述图片,不是用一般过去式吗?
那这两者是冲突了吗?该怎么样写呢?是experienced 还是have experienced?
求比较权威的解释!

past 表示过去几年,用现在完成时态
再问：有人说：during并不一定非要用现在完成时，是你所要表达的意思决定了你用的时态，而不是时间状语。
在这里，只不过是对过去一个事件的趋势做一个客观描述，一般过去时就可以了。

？？

during the past several years引发的疑问? It during the past five years Our school has changed greatly in the past several years. in the past years he____(write)several novels during the past 20 years 和 over the past 20 years一样吗? During the past two years与in the past two years区别 What _____you _____(do) during the past two years? during the past 50 years用于什么时态 during the past与in the past的区别 during the past 3 years=in the last 3 years（现在完成时） in the pa in the last two years/during the last two years/in the past 英语翻译The primary focuses of NEMA over the past several years