there is nothing in the bag

后面的反意疑问句用肯定形式：is there?
there is nothing in the bag,is there?
当陈述部分有never,seldom,hardly,few,little,barely,scarcely,nothing,none,rarely 等否定意义的词汇时,后面的反意疑问句则为肯定形式：
　　There are few apples in the basket,are there?
　　He can hardly swim,can he?
　　They seldom come late,do they?

如果是疑问句的话，应该这样说：Is there anything in the bag?
肯定回答是：Yes, there is.
否定回答是： No，there isn't.