1、时间状语从句.
常用引导词：when，as，while，as soon as， before，after，since，till，untill
特殊引导词：the minute，the moment，the second，every time，the day，the instant， immediately，directly，no sooner... than， hardly... when，scarcely... when
例：No sooner had I arrived home than it began to rain.
还没到家就开始下雨了。
2、地点状语从句.
常用引导词：where
特殊引导词：wherever，anywhere， everywhere
例：Wherever you go， you should work hard.
3、原因状语从句.
常用引导词：because，since，as
特殊引导词：seeing that（由于，因为），now that（既然，由于），in that（既然，由于）considering that（考虑到……，就……而言）given that （考虑到）
例：Now that everybody has come， let's begin our conference.
4、目的状语从句：
常用引导词：so that（以便，所以），in order that（为了，以便）
特殊引导词：lest（以免），in case（万一），for fear that（以免，以防万一），in the hope that（希望能），for the purpose that（为了）， to the end that（为……起见）
例：The boss asked the secretary to hurry up with the letters so that he could sign them.
5、结果状语从句
常用引导词：so...that，such...that
特殊引导词：such that，to the degree that，to the extent that，to such a degree that
例：He got up so early that he caught the first bus.
6、条件状语从句.
常用引导词：if，unless
特殊引导词：as/so long as（只要）， only if （只要），providing/provided that（假如）， suppose that（假如）， in case that（如果）， on condition that（如果）
例：We'll start our project if the president agrees.
7、让步状语从句.
常用引导词：though，although，even if，even though
特殊引导词：as(用在让步状语从句中必须要倒装），while(一般用在句首），no matter...，in spite of the fact that，while，whatever， whoever， wherever， whenever，，however， whichever
例：Much as I respect him， I can't agree to his proposal.
8、比较状语从句.
常用引导词：as(同级比较），than(不同程度的比较）
特殊引导词：the more...the more...，just as...，so...，A is to B what/ as X is to Y，no... more than，not A so much as B
例：She is as bad-tempered as her mother.
9、方式状语从句
常用引导词：as，as if，how
特殊引导词：the way
例：When in Rome， do as the Roman do.
