状语从句分类及常用连词：时间状语从句when,whenever,while,as,before,after,since,till,once,as soon as,etc.地点状语从句where,wherever 原因状语从句because,since,as,for,now that,etc.目的状语从句in order that,so that,that,etc.结果状语从句so…that,so that,such…that,that,etc.条件状语从句if,unless,as(so)long as,etc.让步状语从句though,although,even if,even though,however,whatever,as,etc.比较状语从句as…as,so…as,than,etc.方式状语从句as,as if,as though,etc.