have.has.在改一般疑问句中为什么有时
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1. have ,has 作为行为动词时，变一般疑问句在袜模句首加助动词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 用于现在完成时中山好团作为助动词时，变一般疑问逗橘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 ?
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 用于现在完成时中山好团作为助动词时，变一般疑问逗橘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 ?
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