before
「before」的意思
prep. （时间上）在……之前，早于；在（某个钟点）之前；（次序）在……之前；当面，在……面前；由...
adv.在前,以前 prep.在...之前 conj.在...之前,与其...宁可
「before」的用法
before在...之前 - 在会议开始之前，我们需要完成所有的准备工作。
「before」的例句
She arrived before the meeting started.
她比会议开始早到。
He left before the storm arrived.
暴风雨来之前，他离开了。
They finished their homework before dinner.
他们在晚餐前完成了作业。
The train left before I could get on it.
火车在我能上车之前就开了。
She got up before her children.
她比她的孩子们早起床。
The meeting ended before I could speak.
会议在我能发言之前就结束了。
He arrived early, so he was able to get a good seat before the show started.
他来得早，所以能在表演开始前找到一个好座位。
They left the house before it started raining.
他们在下雨开始前离开了房子。
The teacher came to class before we arrived.
老师在我们到达前就来了。
We had to leave early because of the heavy traffic.
因为交通堵塞，我们不得不提前离开。