The doctor did what he could ( ) the dying man.此句中情态动词could后为什么不用_英语解答

The doctor did what he could ( ) the dying man.此句中情态动词could后为什么不用动词原形而是不定...
The doctor did what he could ( ) the dying man.此句中情态动词could后为什么不用动词原形而是不定式结构呢?

人气：495 ℃　时间：2019-12-03 00:30:32

解答

to save
这里did what he could=did everything,后面to do是目的状语,不是接could