adj.在楼上的；高级的
adv.在楼上；在较高地位

I need to go upstair to fetch my book.
我需要上楼去取我的书。
The guest bedroom is located just upstair.
客房就在楼上。
Can you please take the laundry basket upstair?
你能把洗衣篮拿到楼上吗？
She heard a noise coming from upstair last night.
昨晚她听到楼上传来一阵声响。
There's an art studio on the upstair floor of the building.
这栋建筑的楼上有一间艺术工作室。
We decided to turn the upstair area into a home office.
我们决定把楼上区域改造成家庭办公室。
Please don't run upstair, it might disturb the neighbors.
请不要跑上楼，这样可能会打扰到邻居。
After dinner, he excused himself to retire upstair.
晚餐后，他告辞上楼休息。
The children love playing in the playroom upstair.
孩子们喜欢在楼上的游戏室玩耍。
My brother usually studies in his room upstair.
我哥哥通常在楼上的房间里学习。