《状语从句简单》PPT课件.ppt
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1、状语从句,What are“Adverbial Clauses”?,在主从复合句中修饰主语中的动词、形容词、副词等的从句叫做“状语从句”。分类如下:,状语从句,1.时间状语从句,2.地点状语从句,3.原因状语从句,4.条件状语从句,5.让步状语从句,6.目的状语从句,7.结果状语从句,8.方式状语从句,9.比较状语从句,1)常用连词如下:as,when,while,till/until,not until,before,since,after等。,1.时间状语从句,while,when,as辨析,While:引导的时间状语从句只指一段时间,强调某一段时间内,主从句动作同时发生。从句动词常是延续
2、性的 When:既可以指一个时间点,也可以是一段时间,可表示主从句的动作同时或先后发生。从句动词可以是延续性的,也可以是非延续性的。As:强调主句从句动作相并发生,译为”一边一边”或“随着”,1._he returned,his wife was cooking.2._he was reading,his wife was cooking.3.We talked happily_we walked along.4._ time goes by,its getting colder.,When,While,as,As,当主句是非持续性动词,从句的谓语动词是持续性动词时,when,while,as
3、可互相替换_we were still,the teacher came in.,While/when/As,laughing,另外,when/while还作并列连词,连接并列分句,while表示“而,可是”如:I like reading _my wife enjoys watching TV.when表示 突然性“就在这时”在下列结构中,表示某件事正在发生或刚刚发生,另一动作同时发生。1.be about to do when2.be doing when3.be on the point of doingwhen4.had done when,while,._(我们正要开始就在这时sta
4、rt)it began to rain.2._mom came in.3.I had just got home _(就开始下雨),1.We were about to start when,我正在玩电脑游戏就在这时妈妈进来了。,I was playing computer games when,when it began to rain,till 只能用于肯定句中,until既可以用于肯定句,也可以用于否定句。e.g.I will be here till/until he comes back.I wont know where he is until I get a letter fro
5、m him.,until/till 区别,“延续的动词(肯定式)+until”表示“直到为止”1.我一直睡到闹钟响为止._.“非延续性动词(否定式)+until”表示“直到才”2.直到他完成工作才上床睡_,I slept until the clock alarmed,He didnt go to bed until he finished his work.,注意:not until 在句首时要倒装,Not until he saw it himself_(他才相信),did he believe it.,Its/will be+一段时间 before+一般现在时 表示过了多久才Its/wi
6、ll(not)be+一段时间 before+一般现在时 表示没过多久就it s been+一段时间 since+一般过去时,before/since 用法,It will be a long time before we meet again.It will not be a long time before the China become a developed country.It 20 years since we first each other.,saw,has been,2)一些表示时间的名词词组也可引导时间状语从句。如:the moment/the minute/the sec
7、ond(一就)next time(下次),every/each time(每次)first time,by the time(到时候)The moment he comes,I will tell him.By the time I graduate from this school,I will have been here for three years.Be sure to call me next time you come here.Every time I caught a cold I had pain in my head.,3)as soon as,immediately,d
8、irectly,instantly 等副词也可引导;表示“一就”。As soon as I reach home,I will tell him the news.I left immediately the clock struck 5,4)一些固定搭配也可引导时间状语从句 a.hardly when b.scarcely when/before c.no sooner than 都表示一就,用以引导时间状语从句。注意:当 hardly,scarcely及no sooner位于句首时,从句中的主谓要倒装。e.g.No sooner had she gone than it happened,
9、1.I was so familiar with him that I recognized his voice _ I picked up the phone.while B.afterC.In case D.the minute2.How long do you think it will take _ our product becomes popular with the consumers?when B.untilC.before D.since,Exercises,3._ the day went on,the weather got worse.With B.since C.As
10、 D.While4.He was halfway through his meal _ a familiar voice came to his ears.why B.where C.when D.while5.Hardly _ into the village _ it began to rain.we had got;when B.we got;thanC.had we got;when D.did we get;than,2.地点状语从句,地点状语从句用连接副词 where或wherever(在任何地方)引导。,e.g.a.Just stay where you are.b.You ca
11、n sit wherever you like.,注意:不要混同于where 引导的定语从句,与定语从句的区别:where引导定语从句,从句前有一个表示地点的名词Go back where you came from.(_)Go back to the city where you came from.(_),状语从句,定语从句,1.Please put the book _(我能容易找到的地方find)2.Please put the medicine _(你的小孩够不着的地方reach)3.Please put the shoes _(原来的地方be),where I can find i
12、t easily,where your child cant reach it,where it was,3.原因状语从句,原因状语从句表示主句中的某一动作或状态所发生的原因。引导这种从句 常用的连接词是:because,since,as,for,now that 等。,1)because 语气最强,用来回答why提问,可用在强调句型中。_(是因为他生病)he didnt go with us.2)since语气比because弱,表示关系上的自然结果,一般译成“既然,鉴于”(往往放于主句之前)_,lets carry out the plan.(既然没人反对),Since no one is
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