自己想的奇怪grammar,请英文好手解答

为什麼可以 i know what is more 而不能i know what do they do (我知道是i know what they do是名词子句)
因为同样what do we do?和what is more ?都是问句。
你搞错了吧.what is more不是问句来的,它是个phrase,i know 后面要跟陈述请气,怎麼可以说what do they do呢?

还有i know what to do中 what to do 没有verb, 那麼what to do 是什麼词性,是phrase吗?
先生,难道do不是动词吗?你去查查字典,看看do是不是动词来的
what to do,主语what+动词不定式to do

what is more 和what to do 是名词子句吗?
what is more可以当作是一个固定的phrase,what to do就是一个名词性句子

I know what ...是宾语从句,要用陈述语序,do they do

是问句.

to do 是动词不定式,what做do的宾语

I know 后面要借陈述语序的宾语从句，what is more中what 是主语，而且what is more 就是陈述语句，主谓宾的顺序。而what do do they do 中的 what是宾语，they才是主语，正常的主谓宾顺序应该是 they do what 可是疑问动词 what 要提前，所以就是I know what they do了