We all know what the poor man should have said, but what he

不能省,but 后面加从句,从句改变顺序为he actually said was what.如果不加what,was就没有意义了.
如果不想要what,就要把这个句子拆成两个单独的句子.We all know what the poor man should have said,.He actually said ：“”.
再问： he actually said是作what的定语?
再答： 不是，what he actually said 是what引导的主语从句。