题目内容：

英语问题--语法知识运用31
31.I think that he must be looking up theinformation in the library,_______?
A.isn’t he B .don’t I C.do you D.must he
正确答案是A,我选的是B,普通反意疑问句不是变主句,只有否定前疑才变从句么?请问为什么A正确,B不正确?

优质解答

规律——在【I/We + 谓语动词 + （that）从句】句型中,反意问句与that从句保持一致.如：I suppose you are not serious,are you?I'm sure that you'll succeed,won't you?I don't think that you can do it,can you?...