情态动词后为什么加现在完成时?
2个回答

一般来说,情态动词后,是加动词原形的,但你说的这种情况也有、、、、

举个例子:

Fredierick William I,the king of prussia,who could never have imagined that his greatest gift to the russian people would have such an amazing history.

这一句中,出现could+现在完成时的结构,其实是表示“虚拟语气”