为什么这个句子情态动词后面可以用不定式?The doctor did what he could to save the girl who was badly hurt in the accident.
问题描述：
为什么这个句子情态动词后面可以用不定式?The doctor did what he could to save the girl who was badly hurt in the accident.
答
不可以 这句是你没分析对 what he could是修饰did的 简单来说就是do something to....
答
是could后省略了do,因为前面主句谓语为did.
The doctor did what he could(省略do) to save the girl who was badly hurt in the accident.