引导状语从句的引导词语有
时间状语从句：when,while,as,before,after,till（或untill）,since
地点状语从句：where
原因状语从句：because,since,as,for
目的状语从句：so that,in order that,least,in case
方式状语从句：as,as（if）though
结果状语从句：so（such）...that...,so that
条件状语从句：if,unless,in case,as long as
让步状语从句：although,though,as