Tom did what he could ____ the girl in the river.A.save B.saved C.to save D.saving

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Tom did what he could ____ the girl in the river.A.save B.saved C.to save D.saving
Tom did what he could ____ the girl in the river.
A.save B.saved C.to save D.saving

Tom did what he could ____ the girl in the river.A.save B.saved C.to save D.saving
乱七八糟,这是目的状语从句 可以由that, so that, in order that, lest, for fear that, in case等词引导
Tom did what he could
主语Tom 谓语did宾语what he could
你这样想,Tom做了这些事干什么呢,to save the girl in the river我为了救女孩,这里的to你可以理解为in order to
Tom做了力所能及的事情目的是救落水女孩
句子还可以这样说
To save the girl in the river,Tom did what he could
还有疑问的话,百度Hi我好了

could+动词原形...固定搭配...

could to do sth.
Tom为救河里的女孩尽了力.

这个句子的关键是he could是用来修饰what的从句,意思是所有他能做的事情。
所以本题的句式是do sth. to do
所以选择C

这个句子could后面应该还有一个do,what he could do 在这里作did的宾语,这个句子中的主语是Tom.did是谓语。表目的,故选C,其实整个句子可以这样看。
Tom did sth(what he could do) to save the girl……
在英语中的,这个句型常常出现。要注意多做练习。