She had to take care of the dog at home,____?a.hasn't she b.did she c.has she d.didn`t sheThe poor man need some help ,___?a.does he b.doesn`t he c.need he d.needn`t he
问题描述：
She had to take care of the dog at home,____?a.hasn't she b.did she c.has she d.didn`t she
The poor man need some help ,___?
a.does he b.doesn`t he c.need he d.needn`t he
答
D A
答
只能选D。因为need不是三单形式，所以是情态动词，所以只能选D
答
1,D.2.D.
原因：1题中,had to 是半情态动词,需借助助动词did 变成反义疑问句.前肯后否.
2题中,注意到need没有用第三人称单数,所以need在此自己就是一个助动词,直接在need上进行变形.前肯后否.