have.has.在改一般疑问句中为什么有时

Question

如题所述

Answer 1

1. have ,has 作为行为动词时，变一般疑问句在句首加助动词do / does (第三人称单数）,作为“有”时可直接把它们提到句首。
如：
They have lunch at home .
Do they have lunch at home ?

He has a pen .
Does he have a pen ?
或
Has he a pen ?

2 have, has 用于现在完成时中作为助动词时，变一般疑问句时直接把它们提到主语前面
如：
We have finished the work .
Have you finished the work ?

She has been to Beijing .
Has she been to Beijing ?