单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,状语从句,中考英语语法专题,状语从句中考英语语法专题,状语从句主要用来修饰主句或主句的谓语。一般可分为九大类,分别表示时间、地点、原因、目的、结果、条件、让步、比较、方式。尽管种类较多,但由于状语从句与汉语结构和用法相似,所以理解和掌握它并不难。状语从句的关键是要掌握引导不同状语从句的常用连接词和特殊的连接词即考点。,状语从句简介,状语从句主要用来修饰主句或主句的谓语。一般可分为九大,总结、状语从句常见引导词,总结、状语从句常见引导词,中考英语专题复习状语从句课件,一、时间状语从句,I was watching TV at ten oclock yesterday.,I was watching TV when my mother got home.,-,时间状语,-,时间状语从句,一、时间状语从句-,1.,时间状语从句的,引导,词,：,when,（,当,时候）,while,（,当,时候）,before,（在,之前）,after,（在,之后）,till/until,（直到）,as soon as,（一,就,），,as,（当,时,一边,一边,）,since,（从,以来）,by the time,（,当时候）,等引导。,1.时间状语从句的引导词：,在忘记之前,我要把它写下来。,我一到上海就会写信给你。,我们一直到雨停了才离开。,We did,nt,leave,until,the rain stopped.,As soon,as,I arrive in Shanghai,I will write to you.,Ill write it down,before,I forget it.,在忘记之前,我要把它写下来。We didnt leave,2.,在时间状语从句里，当主句是一般将来时，从句用一般现在时。,I,ll ring you up as soon as I get to New York.,I will tell him everything when he comes back.,He wont believe it until he sees it with his own,eyes,.,2.在时间状语从句里，当主句是一般将来时，从句用一般现在时。,w,hen,:,当,时候,通常指某一特定的时间点，主句与从句的动作同时发生。,When,I opened the window,I saw him come up.,When,I have time,I will go to see you.,When,I came home,I met an old schoolmate of mine.,He said he would tell her about it when,he saw her,.,when:当时候,通常指某一特定的时间点，主句与从句,while:,在期间，往往指一段时间,从句中一般用持续性动词作谓语。,She fell asleep while she was reading the newspaper.,while有时可以作并列连词，表示对比，可译成而。,I am fond of English while he likes maths.,I was working while he was playing.,while:在期间，往往指一段时间,从句中一般用持续性动,as:当时；一边一边；随着,某事一发生，另一事立即发生,两个动作同时发生,As,the day went on,the weather got,worse.,As,the captain passed me,I asked,him whether there was any hope of,saving the ship.,as:当时；一边一边；随着某事一发生，另一事立即,_hehadfinishedhishomework,，,hetookashortrest,_he walked along the lake,，,he sang happily.,_ she was typing the letter,the telephone rang,when,，,as,，,while,区别,when,while,as,When,As,While,时间点,延续性动词,“,一边,.,一边”,时间段,终止性动词,_hehadfinishedhi,as soon as-一就,Jack went to school as soon as,he got well,.,Ill ring you up as soon as,I get an answer from him,.,as soon as-一就Jack went,since：自从,通常主句用现在完成时,I have never been there again since,I graduated from the university,.,It is+,时间段,+since,从句,(,过去时,),It has been+,时间段,+since,从句,(,过去时,),It is five years since we met last time.,It has been ten moths since we graduated.,since：自从,通常主句用现在完成时I have n,before,在,前,It will be half a year before I come back.,It won,t be half a year before we meet again.,We sailed four days and nights before we saw the land.,it will be+,一段时间,+,before.,多久之后才,.,it wont be+,一段时间,+,before.,不久就,.,before 在前it will be+一段,till,until和not,until：,1.until/till,引导时间状语从句,用于肯定句时,，,主句的动词是延续性动词,，表示动作或状态一直持续到,until/till,所表示的时间，意为“某动作一直延续到某时间点才停止”。如：,We waited until he came.,2,用于否定句时，主句谓语动词是非延续性动词,，从句为肯定，意为“某动作直到某时间才开始”,如:,He wont go to bed till/until she returns.,till,until和notuntil：1.until,1.Ill write to you _ I get there.A.while B.before C.as soon as D.by,2.He has lived in the city _ he came back from America.A.when B.before C.since D.after,3.We wont leave here _ our teacher comes back.A.until B.since C.after D.as soon as,4.I had to finish the picture _ my mother came back.A.until B.before C.after D.while,5.John fell asleep _ he was listening to the music.A.after B.before C.while D.as soon as,时间状语从句,练习,时间状语从句练习,地点状语从句由,where,wherever,等引导。,例如：,You can take a walk,wherever,you like to.,-Mom,what did your doctor say?,-He advised me to live,where,the air is fresher.,二、地点状语从句,二、地点状语从句,由,if（,如果,）,unless（if.not，除非）,so/as long as（,只要,）,等引导，谈论的是一个有可能发生的事实及其产生的相关的结果，主句用现在时，从句也用现在时；主句用过去时，从句也用过去的某种时态。,主将从现具体地讲，主句是一般将来时(包括祈使句和含有情态动词can,may,must等)，从句也用一般现在时。,We wont wait for him,if,he,doesnt come,before 12oclock.,We wont wait for him,unless,he,comes,before 12oclock.,So long as,you,keep,on trying,you will surely succeed.,三、条件状语从句,由if（如果）,unless（if.not，除非）,“祈使句+and（or）+,结果句,”,=,条件状语从句,Hurry up,or,youll be late.,=If you,dont,hurry up,youll be late.,Study hard,and,you will pass the exam.,=If you study hard,you will pass the exam.,“祈使句+and（or）+结果句”,Youll be late _ you dont get up early tomorrow morning.A.if B.when C.before D.until,If he _ on time,we will go without himA.doesnt come B.dont comeC.didnt come,If you _ him tomorrow,please ask him if he _ to work on the farm with us.A.see;goes B.will see;goes C.will see;will go D.see;will go,总结：条件状语从句考的频率比较高，主要考查,if,连词和,if,引导的从句与主句的时态（主将从现,）,条件状语从句练习,如果,是否,总结：条件状语从句考的频率比较高，主要考查if 连词和i,原因状语从句通常由,because,as,since,等词引导。,because,语气较强，用以回答,why,问句。,Why are you late again today?,Because Ive got a bad cold.,as,语气较弱，较口语化，所表示的原因较明显。,As,I didnt know the way,I asked a policeman.,since,语气较弱，常表对方已知的事实，相当于汉语的“既然”。,Since you cant answer the question,you might ask someone else for help.,四、,原因状语从句,原因状语从句通常由because,as,since,等,because,和,so,不能,同用在一个句子里,如：,我们不能说：,Because,it rained hard,so,we stayed at home.,应该说：,或,It rained hard,so,we stayed at home.,Because,it rained hard,we stayed at home.,because和so不能同用在一个句子里,如：It r,because of,和,because,的区别,because of后加名词代词或动名词，不加句子，而because加句子，例：,Because of,his illn