1.时间状语从句
　　1).由when 、 while、as（当……时候）引导的时间状语从句。
　　When jack got home , his mother was cooking .
　　2).由after/ before (在….之后/ 前)引导的时间状语从句。
　　The football match played after school was over .
　　3).由as soon as (一…..就……)引导的时间状语从句。
　　I'll ring you as soon as I reach Beijing .
　　4).由not….until（直到…..才…..）引导的时间状语从句。
　　They didn't stop until they finished the work .
2.原因状语从句
　　由because 、since 、as（因为、既然、由于）引导的原因状语从句。
　　Since you have known about that , please tell us what to do .
3.地点状语从句
　　由wherever（无论在哪儿）
引导的地点状语从句。
　　Wherever he goes , he always brings his pet dog .
4.目的状语从句
　　由so that (以便、为的是)引导目的状语从句。
　　He got up very early so that he could catch the early bus .
5.条件状语从句
　　由if或unless 引导条件状语从句。
　　I won't go to his party unless I am invited .
6.比较状语从句
    由than、 as…as、not as……as 引导比较状语从句。
　　There are more students in our class than in theirs .
7.让步状语从句
    由though 、even though/ if 、although引导让步状语从句。
　　Although he didn't pass the exam ,his father didn't get angry with him .
8.方式状语从句　　
    由as if (好像)引导方式状语从句。
　　He talked about that as if he knew everything .
9.结果状语从句　　
    由so…that…、such….that…（如此…..以致于…）引导结果状语从句。
　　It was raining so hard that we couldn't see the road .