before和ago的时态

回答

爱扬教育

2022-10-07

before是现在完成时，ago是一般现在时。
before：prep.之前;在…以前;在…面前(或前面);(次序或排列)在前面。
ago：adv.(与动词简单过去时连用)以前。

扩展资料

　　It would be a good idea to call before we leave.

　　我们出发之前打个电话是个好主意。

　　Profits were at the same level as the year before.

　　利润和前一年的持平。

　　Have you ever used this software before?

　　你以前用过这种软件吗？

　　I used to smoke but I gave up two years ago.

　　我过去抽烟，但两年前就戒了。

　　She gave up teaching three years ago.

　　三年前，她放弃了教学工作。