how many tv rooms are there in the building.为什么加are there?蟹蟹!

how many tv rooms are there in the building.为什么加are there?蟹蟹!

题目
how many tv rooms are there in the building.为什么加are there?蟹蟹!
答案
这是固定句型,there be 表示 存在有.
改为陈述句就比较清楚了:
There are three TV rooms in the building.(对three 提问)
How mny TV rooms are there in the building?
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