引导原因状语从句的连词：

　　because:     Because it rained he took a taxi.  由于下雨他叫了一辆出租车。

　　as:          As you're sorry, I'll forgive you.  既然你悔悟了，我就原谅你。Since:       Since you will go there, I will go too.7．让步状语从句的连词：although / though:

　　Though / Although it is not large, the room was light .  房间虽然不大，采光却很好。even if: They'll stand by you even if you don't succeed. 即使你不成功，他们也会支持你。