There be 句型的反义疑问句必须用there进行反问，我们需要注意的是，如果句中有否定词或者是半否定词，如no, nothing, nobody, few, little, hardly等，那么它的反意疑问部分就要用肯定形式；如果句型中带有否定的前缀词，要看成肯定形式，反意疑问部分仍然要用否定形式。
1.There be 句型中，反义疑问部分必须为be 动词 + there
如：There are some apples in the basket, aren't there?
There isn't any milk left, is there?
2.there used to be,反义疑问句有两种形式：didn't there和usedn't there.
如：There used to be some cities wall, usedn't there?
