Question

There is nothing in the books， is there？

为什么填 Is there.
又什么时候填 Isn't there.

Answer 1

因为陈述句部分是否定含义，所以反义疑问告旁部分清腔要用肯定疑答友衫问来表达。若把句子前半部分改为：There is something in the books，那么反义疑问部分就是isn't there。

Answer 2

答：There is nothing in the books， is there？（书上什么都没有，是吗？）前面的陈述部分含有否拍扮定词nothing,是表示否定意义的,所以说后面的反意袭侍灶疑问句谈友的简略问句一个是有肯定形式的。例如：

There is something new in today's newspaper， isn't there？