Or should it be a private fire department that only comes to your burning house if .....

Question

Or should it be a private fire department that only comes to your burning house if you paid your monthly fire bill?
should it be 是什么用法，能否举几个例子？

Answer 1

这是一种假设的陈述方式。
比如 Should I am getting rich, I would like to travel around the world.

供参考。

Answer 2

这句是一般疑问句阿。 Should it be a private fire department?
如果你每月都付了消防帐单，那消防局是否就应该成为你私人的消防局，只负责灭你家的火了呢？
it =the fire department

Answer 3

这算是一种强调句的疑问表现形式。强调be后边的东西
举个例子：
Should it be you who is the elder sister? 难道 最年长的那个姐姐不是你吗？
Should it be him that is responsible for this project? 难道 负责这个项目的人不是他吗？