Question

after that, he knew he could any emergency by doing what he could to the best of his ability

after that, he knew he could any emergency by doing what he could to the best of his ability中的what后面的句子是什么从句

Answer 1

先把原句补全啊，童鞋！

After that，he knew he could get through any emergency by doing (what he could) (to the best of his ability)．

然后再从语法角度补全难点部分：doing what he could do, 例句其实从经济性角度省略了后面的do, 换个词，比如eatting what he could find, 是一样的。补全后的what he could do是由what引导的宾语从句，作doing的宾语。

句尾的介词短语to the best of his ability表示努力的程度，相当于副词tirelessly，

by doing sth tirelessly

sth=what he could (do)

tirelessly=to the best of his ability

这样公式置换能理解吧？

Answer 2

what后面引导的是一个宾语从句。

Answer 3

宾语，宾语从句