what he says and waht he does do not agree为什么say和does用复数 do用单数

问题描述:

what he says and waht he does do not agree
为什么say和does用复数 do用单数

says 这是第三人称单数形式,后面的does也是do的第三人称单数
主语是两个从句what he says 和what he does ,所以谓语动词要用do