名詞 upstairs:

1. the part of a building above the ground floor

形容詞 upstairs:

1. on or of upper floors of a building
   同義詞：upstair

副詞 upstairs:

1. on a floor above
   同義詞：up the stairs, on a higher floor
2. with respect to the mind
   同義詞：in the head, in the mind

1. They tiptoed upstairs so as not to wake the baby.
   他們踮著腳上樓，生怕把孩子吵醒。
2. The boss wants you you'd better get upstairs at the double.
   老板叫你－－你最好趕緊上樓去，
3. Let's go upstairs where we can be a bit more private.
   咱們上樓吧，那里沒什麼外人。
4. We crept upstairs so as not to wake the baby.
   為了不吵醒嬰兒，我們躡手躡腳地上了樓梯。
5. Every now and again she went upstairs to see if he was still asleep.
   她時而到樓上看看他是否還在睡著。
6. The upstairs rooms are much warmer than those on the ground floor.
   樓上的房間要比底層的暖和得多。
7. The boy ran upstairs quickly.
   男孩很快地跑上樓。