状语从句课件ppt

  • 发布时间:2013-11-01
  • 课件大小:20 KB
  • 所属栏目:高一英语
  • 课件格式:.rar(压缩解压).ppt(使用格式)
  • 课件等级:状语从句课件ppt推荐等级为3星
  • 简略标题:状语从句
  • 应用环境:多媒体教学
  • 制作使用:PowerPoint
  • 应用阶段:通用版本

状语从句课件ppt介绍

状语从句课件ppt内容预览:1.时间状语从句2.地点状语从句3.原因状语从句4.目的状语从句5.结果状语从句6.条件状语从句7.方式状语从句8.比较状语从句9.让步状语从句1、时间状语从句引导时间状语从句的从属连词有:when,while,as,whenever,before,after,since,till,until,as soon as,once,hardly…when,no sooner…than等引导。如:When he was still a young man,he was forced to leave his homeland for political reasons.It has been 15years since he left.I’ll tell him the news as soon as I see him.Once you have got used to it,you will like it.I waited till he had finished his work.ppt注意:(1)when,as,whilewhen即可引导持续性动作,又可引导短暂性动作。它可以表示主句的动作和从句的动作同时发生,或从句的动作发生在主句动作之前。如:When I was a boy, I used to go to the seashore onSundays.(同时)When the lesson was over,we began our writing.(从句动作在前)as引导持续性动作,侧重主句和从句的动作同时发生。He hurried home,looking behind as he went.I saw your sister as she was getting on the bus yesterday.He sang as he walked.as也可表示“随着”,但要注意与with的区别:As the day went on,the weather got even cold.(从句,故用谓语动词)With the day going on,the weather got even cold.(介词,故用非谓语)While:指的是“在某一时间里”,“在……期间”,从句里的动作必须是持续性的,它也强调主句和从句动作的同时发生,往往侧重主句和从句动作的对比。如:While he was in London,he studied music.While we were watching TV,he was writing a composition.while也可做并列连词,表示对照的含义,意思为“然而”。如:He is tall while his brother is short.当when,as,while表示“在…一段时间里”,主从句的动作同时发生时,可以换用。如:While (When或As)we were discussing, Mr. Smith came in.(2)如果when和before引导的从句位于主句之后,有时不能译成“当…时候”和“在…之前”,而要译成“就”、“才”、“这时”等。如:The struggle lasted four years before the North won in the end.He almost knocked me down before he saw me.She had not been married many weeks when the man saw her and was struck by her beauty.I was walking in the street when I saw him.before 的句型:It won’t be long before sb.does sth.不用多久某人就会……It will be long before sb.does 要过很久某人才会……It was long before sb.did sth.过很久某人才做……It will be +一段时间+before sb.does 某人要过多长时间才做It was +一段时间+before sb.did sth.某人过了多长时间才做(3)by the time,each time,every time,immediately,the moment,the instant,the minute,soon after,shortly after都可以作为连词,引导时间状语。如:By the time he was fourteen,he had taught himself advanced mathematics.注意by the time 的用法by the time+现在时,主句用将来完成时.例如:By the time he arrives,we will already have leftCalifornia.by the time+一般过去时,主句用过去完成时.例如:By the time he arrived,we had already leftCalifornia.Each time he came,he would call on me.You must show him in immediately he comes.I recognized him the moment I saw him.(4)till和until①如果主句谓语动词是持续动词,通常用肯定式的主句,表示“直到…为止”。如:I worked till (until)he came back.②如果主句谓语动词是瞬间动词,则用否定式的主句表示“直到…才”。如:

课件关键字:状语,从句

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