I often help my mother do some housework

题目

I often help my mother do some housework
housework不可数为什么用do,不用does

答案

首先你要分清句子的结构I often help my mother do some houseworkI是主语 help是谓语 my mother 宾语 do some housework是动宾结构不定式即help sb.(to) do sth.而这里面的 do任何时候都是不用变形的,因为它是不定...