看看这个选择题1.Lindahadnothingforbreakfastthismorning,?A.hadsheB.hadn'tsheC.didsheD.didn'she答案选C,为什么?不是A么?2.It'stimetogotobed.Youhavetogetupearlytomrrow,?A.can'youB.don'tyouC.

Question

看看这个选择题
1.Linda had nothing for breakfast this morning,________?
A.had she B.hadn't she
C.did she D.didn'she
答案选C,为什么?不是A么?
2.It's time to go to bed.You have to get up early tomrrow,____?
A.can'you B.don't you
C.aren't you D.haven' you
答案选B,和上面那道题一样的...为什么不选D呢?

Answer 1

第一题选C.
因为had nothing是没东西吃,相当于ate nothing,且含有否定成分.前面否定,后面要用肯定.对于动词过去式的反问要用did.
第二题选B.
因为have to 是一个短语,不是孤立的have.而且这句话并不是对have to反问,而是对get up反问.对于动词现在式的反问要用do.又因为前面是肯定,后面要用否定.所以要用don't.