ahead of time 提前
例句：
I did my homework ahead of time,so I can play tonight.
我提前做了家庭作业，所以今晚可以玩了。
The train has left five minutes ahead of time.
火车提前5分钟离开了。
Thanks to your help,we have completed the project two weeks ahead of time.
多亏了您的帮助，我们提前两周完成了这项工程。
背景音乐：
Macy Gray-Let you win
