1)时间:when,as,while,before,after,since,till,bythetime,assoonas,hardly..when,nosoonerthan,themoment
2)原因:because,since,as,for,seeingthat,nowthat,consideringthat,inthat,notthat..butthat
3)地点:where,wherever,anywhere,everywhere
4)条件:if,unless,onconditionthat,providedthat,grantedthat,aslongas,supposetat,giventhat,incase
5)让步:although,though,evenif,whether…or,nomatter+wh
6)目的:sothat,inorderthat,forfearthat,incase
7)结果:so,sothat,so..that,such..that
8)方式:as,justas,asif,asthough,inthewaythat
9)比较:as…as,than,notso..as,themore…themore,as..so