时间地点状语从句.ppt
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1、LOGOPowerPoint Template状语从句状语从句(副词性从句副词性从句)定义:修饰主句中的谓语动词、形容词或者副词定义:修饰主句中的谓语动词、形容词或者副词 等的从句。等的从句。分类:时间、地点、原因、条件、方式、让步、分类:时间、地点、原因、条件、方式、让步、目的、结果、比较状语从句。目的、结果、比较状语从句。Company Logo1.时间状语从句时间状语从句v引导词和词组:vwhen,while,as,当的时候vafter,before,v until,till,直到vsince,自以来vonce,一旦vevery time,each time.每次v whenever,n
2、o matter when 无论何时vby the time,截止到vas soon as,vno soonerthanvhardlywhenvscarcelywhenCompany LogoA before的用法It is/was(not)+时间+before+从句 用了多长时间没过多久,你就把它全忘了.It was not long before I forgot it all.她过了很久才回来.It was long before she came.他们要过四天才能回来。It will be four days before they come back.After you think
3、it over,please let me know what you decide.你仔细考虑过以后,告诉我你是怎样决定的。After we had finished the work,we went home.完成工作之后,我们回家了 Company LogoB 由by the time引导的时间状语从句。注意时态的变化:如果从句的谓语动词用一般过去时,主句的谓语动词用过去完成时;如果从句的谓语动词用一般现在时,主句的谓语动词用将来完成时。例如:到你回来时,我已经写完这本书了。By the time you came back,I had finished this book.你明天来这儿
4、的时候,我将已经完成此工作了。By the time you come here tomorrow,I will have finished this work.By then 截止到那时By the end of last year截止到去年今年年底Company LogoC“一就”as soon as,immediately,directly,instantly,the moment,the instant,the minute,I will go there directly I have finished my breakfast.吃完早饭,我立即到那里去。The moment I h
5、eard the news,I hastened to the spot.我一听到消息,马上赶到了出事地点。As soon as I reach Canada,I will ring you up.我一到加拿大,就给你来电话。Company LogoThe fans cried as soon as they saw the movie star.追星族一看见这位影星就喊了起来.no soonerthanThey had no sooner saw the movie star than the fans cried.No sooner had they saw the movie star
6、than the fans cried.HardlywhenThey had hardly saw the movie star when the fans cried.Hardly had they saw the movie star when the fans cried.ScarcelywhenThey had scarcely saw the movie star when the fans cried.Scarcely had they saw the movie star when the fans cried.Company LogovD when,while,as v相同点:
7、都表主从句动作同时发生,常可换用。v区别:1).when既可指时间点,也可指时间段.v 可表示一个动作在进行时,另一个动作发生了.v 一般主句用过去时,从句用过去进行时.或主 v 句用过去进行时,从句用一般过去时.v When the teacher came in,they were talking.Company Logov2).while强调时间段,从句动词必须是延续性动词,从句一定用过去进行时,强调从句动作”正在进行”.还可主句从句同时用过去进行时,表两个动作同时发生.而 when 没此用法.v My mother was cooking while my father was v w
8、atching TV.v While they were drawing,the teacher came in.vWhile 也可用作并列连词,表对比的转折,意为”而,却”v He likes singing,while his brother likes dancing.Company LogovAs表示“一边一边”,as引导的动作是延续性的动作,一般用于主句和从句动作同时发生;as也可以强调“一先一后。例如:vWe always sing as we walk.v我们总是边走边唱。(as表示“一边一边”)vAs we was going out,it began to snow.v当我们
9、出门时,开始下雪了。(as强调句中两个动作紧接着先后发生,而不强调开始下雪的特定时间)Company LogovE 由since引导的时间状语从句。since引导的从句的谓语动词可以是延续性的动词,又可以是瞬时动词。一般情况下,从句谓语动词用一般过去时,而主句的谓语动词用现在完成时。但在It is 时间since从句的句型中,主句多用一般现在时。例如:vI have been in Beijing since you left.v自从你离开以来,我一直在北京了。vWhere have you been since I last saw you?v自上次我和你见面以后,你到哪里去了?vIt is
10、 four years since my sister lived in Beijing.v我妹妹不在北京住有四年了。vIt is five months since our boss was in Beijing.我们老板离开北京有五个月了。Company LogoF 由each time,every time和whenever引导的时间状语从句。Each time he came to Harbin,he would call on me.他每次来哈尔滨,总是来看我。You grow younger every time I see you.每次遇到你,见你更年轻了。Whenever I
11、visited him,he was not at home.无论何时我拜访他,他都不在家.No matter when I visited him,he was not at home.Company LogoG till 和 until都表示“直到”,但句首多用until.1).在肯定句中表示“直到为止”,主句要用延 续性动词:I worked until he came back.我工作到他回来为止。2).在否定句中,表示“直到才”,主句通常用短暂 性动词,这时till 和until可用before替换:I didnt go to bed until(till)my father cam
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