状语从句，顾名思义，就是在句子中充当状语成分的从句。

　　状语从句的区分主要根据从属连词来确定。

　　常见的状语从句类型有如下：

　　(1) 时间状语从句：

　　I was doing my homework when the doorbell rang.

　　I was watching TV while my mum was cooking.

　　As time went by, the weather became colder.

　　He didn't go to bed until his mother came back.

　　I will call you as soon as I get there.#p#副标题#e#

　　(2) 条件状语从句：

　　If it doesn't rain tomorrow, we will go for a picnic.

　　You will fail the exam unless you work hard.

　　(3) 结果状语从句：

　　He was so angry that he couldn't say a word.

　　(4) 比较状语从句：

　　You are as pretty as your mother.

　　I am taller than my brother.

　　(5) 让步状语从句：

　　Although it is difficult, we will do it.

　　Though he was ill, he was still working.

　　(6) 原因/结构状语从句：

　　He didn't go to school because he was ill.

　　Since you ask me, I will tell you all.

　　(7) 地点状语从句：

　　Where there is a will, there is a way.

　　Wherever I am, I will be thinking of you.