since, until, every time, each time, next time等引导。

　　As soon as you arrive, give me a phone call. 你一到就给我来电话.

　　Mary was reading when I left. 我走的时候玛丽正在读书.

　　While I played the piano, sister did her homework. 我在谈钢琴,姐姐在做功课.

　　You can’t leave until you go through with your work. 不完成这项工作你不能走。

　　注意: 1. 用until引导时间状语从句时, 主句应用可持续性动词,如果主句是非持续性动词,则主句用否定形式. 如:

　　I won’t go until you come back. 你回来了我再走.

　　2. 在时间状语从句中,常用一般现在时表示一般将来时, 用一般过去时表示过去将来时. 如:

　　Don’t forget to bring your DV4000 camera here when you come. 你来的时候别忘了带DV4000摄像机.

　　3. 在由since 引导的时间状语从句中,主句用现在完成时,从句用一般过去时. 也可用 “It is + 一段时间 + since (引导一般过去时的从句)”句型. 如:

　　He has worked in that company since he graduated from Wuhan University. 他毕业以来就一直在那个公司工作.

　　2.地点状语从句

　　在句中相当于地点状语的从句叫地点状语从句.引导地点状语从句的常用词有 where, anywhere, somewhere等.

　　Make marks where you have questions. 在有问题的地方作出标记.

　　You can go anywhere you like. 你可以到你想去的任何地方.

　　Where there is a will, there is a way. 有志者事竟成.

　　3. 原因状语从句

　　在句中相当于原因状语的从句叫原因状语从句. 引导原因状语从句的常用词有because, as, since, for 等.

　　Roman was absent from school because he was ill. 罗曼病了, 没有上学.

　　As Parker was in a hurry, he left this bag home. 由于派克太匆忙才把包丢家里了.

　　Since everyone makes mistakes, you shouldn’t always criticize him. 既然每个人都会犯错误, 你不该总是批评他。

　　4. 目的状语从句

　　在句中相当于目的状语的从句叫目的状语从句. 常用in order that, so that引导, 译为 “为了,以致, 以便”.