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,assoonas,etc.

　　地点状语从句where,wherever

　　原因状语从句because,since,as,for,nowthat,etc.

　　目的状语从句inorderthat,sothat,that,etc.

　　结果状语从句so…that,sothat,such…that,that,etc.

　　条件状语从句if,unless,as(so)longas,etc.

　　让步状语从句though,although,evenif,eventhough,however,whatever,as,etc.

　　比较状语从句as…as,so…as,than,etc.

　　方式状语从句as,asif,asthough,etc.