求句子分析Whatwemustdoistoabsorbtheessenceanddiscardthedregs.不是wemustdo怎么又跟了istodo.

Question

求句子分析
What we must do is to absorb the essence and discard the dregs.不是we must do 怎么又跟了 is to do .

Answer 1

【What we must do】是what引导的主语从句,整句话相当于句子的主语；
【is】谓语动词
【to absorb the essence and discard the dregs】不定式做表语
具体解释一下该主语从句：
What we must do 中,what是做了do的宾语,陈述句语序可以转换成：we must do what；
此时跟你所说的 we must do sth.格式一致.