He said educational exchanges can provided an added boost to the U.S.economy.can以后的用法,是虚拟语气吗?能不能讲讲情态动词的虚拟语气呢?

问题描述:

He said educational exchanges can provided an added boost to the U.S.economy.can以后的用法,是虚拟语气吗?能不能讲讲情态动词的虚拟语气呢?

不是虚拟语气,另:请认真查本句出处,笔者怀疑本句有误虚拟语气:现在时:从句:主+were(实义动词用过去时);主句:主+should\would\might\could+do过去时:从句:主+had done;主句:主+should\would\might\...