状语从句专题讲解课件

1、状语从句状语从句分类：时间：while,when,as,whenever,until,not.until, as soon as,the first time,after,before,since地点：where，wherever原因:because, as, since, now that, for结果:so.that, such.that目的:so that条件:if,so/as long as,as/so far as,unless,in case让步:although, though, whatever, whenever, whichever, however, no matter

2、how, even though/if比较:than, as.as时间状语从句1.when,as,while的区别a)当从句表示一段时间时可通用I met lily when/while/as I was walking along the street.b)as和when用于终止性动作；while只能用于延续性动作It was snowing when I got to the airport.c)as强调主从句几乎同时发生的动作He looked behind from time to time as he went.(一边.一边)d)when可表示主从句的动作同时或先后发生When sh

3、e reached home,she had a little rest.d)since“自从”I have been studying English since I was ten years old.e)until/till“直到.为止”主句要用延续性动词；not until表示“直到.才”I waited until he arrived.I wont leave here until I finish teaching.f)as soon as“一.就”。主将从现I will phone you as soon as I get home. g)the first time后接从句

4、I fell in love with her the first time I saw her. 比较状语从句a)比较级+thanHe is teller than you.such+a/an.thatHe was such a handsome boy that I fell for him the first time I saw him.such+形/副+复数/不可数+thatHe told us such funny stories that we all laughed.条件状语从句a)if (主将从现)You will fail the exam if you dont study well.b)unless除非You will fail unless you study well.c)as long as只要You can get everything you need as long as you have money.d)as/so far as“就.而言”as/so far as I am concerned as/so far