has是助动词have的第三人称单数形式,am,is,are是系动词,知否?知道这个就简单了.
否定句;第一句有两种方法,一种直接在助动词后面加not.
He has not short hair.
另一种是在has前面几doesn't ,然后has还原成have.
He doesn't have short hair.
疑问句:在句首加does ,has还原成have.
Does he have short hair?
第二句:
否:系动词is后面加not.
His hair is not short.
疑:系动词is提前.
Is his hair short?