yǐ
qián
1
before
2
formerly
3
previous
4
ago
我睡觉以前,我要吃晚饭。
Before I sleep, I need to eat dinner.
以前在这家公司工作过。
I worked at this company before.
这里是我以前住的地方。
This is where I used to live.
我很久以前去过美国。
I went to America a long time ago.
他一个小时以前去了超市
He went to the supermarket one hour ago