n. the day immediately before today
n. the recent past
r. on the day preceding today
r. in the recent past; only a short time ago
n. 昨天
adv. 昨天
1. I went to the park yesterday.
我昨天去了公园。
2. She finished her homework yesterday.
她昨天完成了作业。
3. We watched a movie together yesterday.
我们昨天一起看了一部电影。