What does she do in the morning 和 What is she doing now 前句用 does 后句用is ,为什么?

问题描述:

What does she do in the morning 和 What is she doing now 前句用 does 后句用is ,为什么?

What does she do in the morning?一般现在时,对动词提问,主语三单借助于does
What is she doing now 现在进行时,构成be+动词ing形式.所以用is