用作状语的从句叫做状语从句，根据其用途分为时间状语从句、地点状语从句、原因状语从句、结果状语从句、目的状语从句、条件状语从句、让步状语从句、程度状语从句、方式状语从句。

1、时间状语从句：表示时间“as 当---的时候、随着” “when 在---时候”“while 在---期间”“after  在---之后”“before 在---之前”“till、untill 直到---才” “as soon as 一---就”“since 自从---以来”

① when spring春天 came, he felt like a trip.旅行

② i can learn while i work.边学习，边工作

③ as the sun rose升起, the fog雾 dispersed.消失

   as 都用于口语，强调同一时间或一先一后；when 强调特定时间，while 也指时间，是指一段时间。

2、地点状语从句：表示地点：where、在---地方 wherever、无论什么地方，anywhere任何地方

① where i live there are plenty of许多，大量 sheep.

② sit down wherever you like.

③ you can go anywhere you want,

3、原因状语从句：表示原因或理由：because、as、since  因为，由于

① i did it because i was angry.生气

② as i didn’t know the way,路 i asked a policeman.警察

③ since i haven’t got her address地址, i can’t write to写信 her.

   because 语气最强，用以回答why引导的特殊疑问句，可以用于强调结构；

   as 语气较弱，比较口语化。         不能用于强调句

   since 语气较弱，表示“既然”       也不能与not 连用

4、结果状语从句：so that  以至于、so---that---  如此地---以至于---、such---that--- 这样的---以至于---、 that 为了---以便---、with the result that 从而，因此，结果是

  it’s such a good chance机会 that we mustn’t miss错过 it.

  i’m so busy忙 that i have no time to write a letter.

5、目的状语从句：so、so that、in order that 为了 ，以便

  speak clearly清楚地 so that they may understand you .

  i’ll show you so you can see how it’s done.

目的状语从句中常用的助动词：  can (could) 、may(might)、shall(should)、will(would)

目的状语从句多位于主句之后

6、条件状语从句：if (如果)、unless(除非、若不)、suppose(假设)、supposing (that)/provided(that)假若、in case (如果、万一)、as (so) long as (只要)

① if it snows tomorrow, we will build a snowman.雪人

② you’ll late unless you hurry.赶紧

③ provided / suppose / given that you keep quiet保持安静, you can come to the concert.音乐会

④ in case it rains, don’t expect 期待等待me.

⑤ he will do anything as long as it is interesting..

7、让步状语从句：虽然，尽管，即使

although(though) 虽然、if / while / even if (though) 、however 不管怎样、whatever 无论什么、no matter what (how / where / when)不管什么 / 怎样 / 哪里 / 何时、whether---or---不管---还是---

① although (though) it is difficult困难的 , we shall do it.

② while i understood your point of view观点, i don’t share it(不敢苟同).

③ if he is little小, he is strong.

④ however height it may be, it can’t reach 达到the sky.天空

⑤i’ll go whether you come with me 和我一起来or stay at home.呆在家里

as though也用于让步状语从句，这种从句须以adj、n、v原形开头，从句倒置主句之前。

①     old as i am, i can still fight.战斗

②     exhausted 疲惫的though she was, there was no hope of her being able to sleep.