2015年成人高考专升本英语常见介词用法：before
来源 :中华考试网 2015-07-18
中
before(在……之前)
Don’t put the cart before the horse. 不要本末倒置。
Pride comes before a fall. 骄傲就会摔跤。
Before starting the work， we had a discussion.
Before long， the war broke out. (break out 爆发)
I bought the book the day before yesterday.
