请问几层楼用英语怎么说?是指描述一座楼有几层,不是指第几层楼.比如一层建筑（=平房 flat?）、二层建筑、5层建筑等

floors .
How many floors

the first floor
the second floor
the third floor
...........

一楼 THE FIRST FLOOR
二楼 THE SECOND FLOOR,
要是说一栋楼有几层的话,
就用 A/THE XXX floor building、department等等
比如这栋楼有8层可以说是：
The Building has 8 floors,
即 The eight floor building
或 The building with 8 floors