陈述部分有must 的疑问句,疑问部分根据实际情况而定。
He must be a doctor, isn't he?
You must have studied English for three years, haven't you? / didn't you?
He must have finished it yesterday, didn't he?
否定词移位的情况,如:
I don’t suppose (that) he is serious, is he?
陈述句是否定形式时,简短问句中动词的选择则由陈述句中的动词形式而定。例如:
He hasn’t a house of his own, has he?
He doesn’t have a house of his own, does he?
在否定的祈使句后, 只能用will you。例如:
Don’t forget, will you?
具体的可以看看
http://baike.baidu.com/view/201301.htm里面说的很详细,我抽出来的是你问的部分,但是我觉得你还可以看看,
就能理解的更详细了。因为你没有给例句,自己看了就更清楚。
参考资料:http://hi.baidu.com/仓之猪