as before

例句：

1. 1.I'll be back as soon as I finish my work.
   我一完成工作就回来。
2. 2.As long as you follow the rules, you can play basketball.
   只要你遵守规则，你就可以打篮球。
3. 3. He was still in his office when I arrived.
   当我到达时，他还在办公室里。