Решение:
В разделительных вопросах (question tags) в английском языке используется вспомогательный глагол из основной части предложения. Если основная часть утвердительная, то «хвост» — отрицательный, и наоборот. Местоимение в «хвосте» соответствует подлежащему.
- He should go, shouldn't he?
- It is the most interesting book, isn't it?
- They can't see him, can they?
- There are no toy shops in this street, are there?
- The cats are lazy, aren't they?
- The apple is tastier than the banana, isn't it?
- Your friends can't come on Sunday, can they?
- We can go, can't we?
- We can't go now, can we?