时间状语从句：由when/while/as引导
地点状语从句：由where/wherever引导
条件状语从句：由if/unless/on condition(that).../supposing/provided引导
让步状语从句：由though,although,while,as; even if,even though; whether...or...; no matter+疑问词,疑问词-ever,regardless of+名词/名词短语/名词从句,despite,in spite of引导
目的状语从句：由that,so that,in order that,lest,for fear that,in case引导
结果状语从句：由so/such that 引导
原因状语从句：由because,as,since,for,seeing (that),now (that),considering (that),in that引导
方式状语从句：由as,(just) as…so…,as if,as though引导