Question

宾语从句中的what to do

如一个句子 I don't know what to do 中的what to do 是否可以换成 how to do 是否能在what to do 后面加一个 it

Answer 1

I don't know what to do 或者I don't know how to do it
what to do 中 what 是代词 做 to do 的宾语
how to do it 中 how 是副词 做 to do it 的状语

Answer 2

有点不一样，what to do it不可以，只能是how to do it