i don't know to do what 这句话到底错在哪里?

问题描述:

i don't know to do what 这句话到底错在哪里?

我知道正确的说法是 i don't know what to do
但 i don't know to do what 这个我觉得也对呀,to do what这个不定式作宾语,不可以吗?
这个句子类似于 i don't want to go to school
to go to school就是不定式作want的宾语
为什么 to do what作know的宾语就不对呢
求语法好的详细解答

1,I don't want to go to school里边儿,to go to school 是要want 的宾语,属于动词不定式做宾语这个语法现象.2,I don't know what to do就是另外一个语法现象啦.what to do是一句话了,相当于是what I should do一类,...