第四楼 英语是说 on the fourth floor还是on the third floor?

第四楼 英语是说 on the fourth floor还是on the third floor? I live on the third floor.on the third floor是什么成分?是地点状语还是宾语? （ ）are on the fourth floor in the department floor 是on fifth floor还是on the fifth floor? 是in the fifth floor还是on the fifth floor 3.I am looking for a flat on the third or fourth floor. “lt's on the third floor”是什么意思 Lives on the third floor.住几楼? they live on the third floor my classroom is on the third floor.的中文是 Jonny lives on the third floor.Lisa lives on the third floor mary lives on the fourth floor in the building,改错