1.If I am not busy tomorrow, I will play football with you. 2.You won’t pass the exam unless you work hard on it. 3.As long as you take my advice, you will outwit your rival.

注意：一般情况下，if, unless, as long as 引导的从句用一般现在时，主句用一般将来时。

E 让步状语从句:

连接让步状语从句的连接词有：although, though, even if, even though, 疑问词 + ever , no matter + 疑问词.

1.Tom was late for school this morning because he didn’t catch the early bus. 2.I couldn’t go to Beijing on business as my mother was ill. 3.Since all of us agreed about this plan, we will carry it out next week. 4.We listened carefully, for the speech was very important.

注意：当连接原因状语从句时，because语气最强，as, since, for次之；because, as, since引导的从句可在主句前面或后面， for引导的从句只能在主句的后面。

D 条件状语从句：

连接条件状语从句的连接词有：if, unless, as long as.

4.I will wait here until(till) you finish your job. 　　　　　 连词 　 I will wait here until(till) 8pm. 　　　　　 介词

(3) 词组：as soon as

I will tell him as soon as he comes back. As soon as she finishes her homework, she will play tennis. 通常情况下，主句用一般将来时，as soon as 引导的从句用一般现在时。

B 地点状语从句：

　连接地点状语从句的连接词有：where, wherever 　1.Where there is water, there is life. 　2.Where there is a will, there is a way. 　3.Wherever you go, I will follow you.== No matter where you go, I will follow you. 　4.I will go wherever I can find a good job.== I will go no matter where I can find a good job.

C 原因状语从句：

连接原因状语从句的连接词有：because, as, since, for.

3.I have lived in Dalian since my son was born in 1999. 　　　　　　 连词 　 通常情况下，主句用现在完成时，从句用一般过去时。 　 I have lived in Dalian since 1999. 　　　　　　 介词

2.He usually drinks a cup of coffee after he comes back from school. 　　　　　　　　　 连词 　 He usually drinks a cup of coffee after coming back from school. 　　　　　　　　　 介词

1.He usually drinks a cup of tea before he goes to school. 　　　　　　　　　 连词 　 He usually drinks a cup of tea before going to school. 　　　　　　　　　 介词

1.When he came in, I was listening to the radio． 2.As I was wandering in the street, I met her. 3.While (as) I was watching TV, my mum was cooking in the kitchen.

(2) 连词before, after, since, until(till). 当他们表示时间时，他们既是介词又是连词。

2.The boy was praised for his bravery. 　The boy was praised because he saved the baby’s life in the freezing　　　　　 river.

　　　　　 二　状语从句的种类：

A 时间状语从句:

连接时间状语从句的连接词有:

(1) 连词：when, while, as. 它们都表示当…时候的意思。如果主句和从句的动作同时发生且都是进行时态，只用while, as. 其他情况下when, while, as通用。

2．The boy was praised for his bravery. 　原因状语修饰was praised

　B 状语从句 就是用一个句子来代替上面的时间状语和原因状语。 　1.Ten years ago, she began to live in Dalian. 　 When she was 12 years old, she began to live in Dalian.

1．Ten years ago, She began to live in Dalian. 　时间状语修饰began