before可以引导什么从句

回答

文典教育

2022-03-20

before引导时间状语从句。
before：
prep.之前;在…以前;在…面前(或前面);(次序或排列)在前面。
conj.在…以前;到…为止;到…之前;以免;不然。
adv.以前;过去;已经。

扩展资料

　　I'd like a second opinion before I make a decision.

　　我在作决定之前，想听听别人的意见。

　　I didn't have time to change clothes before the party.

　　我没时间在聚会前更换衣服。

　　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？