高三英语语法复习课件:状语从句.ppt
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- 英语语法 复习 课件 状语 从句
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1、一个一个_在复合句中用作状语时在复合句中用作状语时,在语法上叫状语从句。在语法上叫状语从句。从句由从句由_或或_引导。引导。分类:分类:状语从句可表示状语从句可表示1)_ 2)_ 3)_ 4)_ 5)_ 6)_ 7)_ 8)_ 9)_等等句子句子时间时间地点地点 原因原因目的目的结果结果条件条件行为方式行为方式比较比较 让步让步名词词组名词词组连词连词一一.引导时间状语从句引导时间状语从句1.when,while,as,before,after,until,till,since,ever since,once,as soon as,2.every time,next/last/each tim
2、e,the first time,the moment,the minute,the instant3.hardlywhen,no soonerthan,scarcelywhen其中其中when,till,until,before,after,as soon as,the moment等等引导时,如果引导时,如果主句主句的时态是一般将来时,则的时态是一般将来时,则从句从句的时态用的时态用一般现在时。一般现在时。when,while,as _ we were talking,Mr Smiths came in._ they came home,I was cooking dinner.I was
3、 about to go to bed _ I heard someone knock at the door.4._ we were watching TV,he was studying.5.He is fat _ his brother is thin.6._ she sang,tears ran down her face.Conclusion:A:从句为从句为”当当的时候的时候”,从句谓语为延续性动词从句谓语为延续性动词,主句谓语为主句谓语为非延续性动词非延续性动词(即终止性动词即终止性动词),三者可通用三者可通用.B 当从句的谓语动词为终止性动词当从句的谓语动词为终止性动词,只能用
4、只能用when;表示表示”正在那正在那时时”,也只能用也只能用when.C.从句和主句的谓语动词都为延续性动词时从句和主句的谓语动词都为延续性动词时,只能用只能用while;while还可作并列连词还可作并列连词,表示表示”而而”.D.当强调主句和从句的动作同时发生时当强调主句和从句的动作同时发生时,只能用只能用as,as,译为译为”一一边边一边一边;随着随着”While/As/WhenWhenwhenWhilewhileAsbefore,after,sinceHe had left the town the day _ she arrived.It was not long _ he lef
5、t his hometown.I played football _ I(had)finished my homeworkPlease tell her Ill come _ I do some shopping.It will not be long _ we meat each other again.I_(be)at his bedside since he _(become)ill.It _(be)two years since we _(begin)to use this machine.beforeafterConclusion:1.before引导的从句是过去式引导的从句是过去式
6、,主句是过去时或过去完成时主句是过去时或过去完成时;.主句主句为过去时为过去时,after从句可用一般过去时代替过去完成时从句可用一般过去时代替过去完成时.since从句用过从句用过去时态去时态,主句一般用现在完成时主句一般用现在完成时.It is/has been+一段时间一段时间+since从句从句 “自从自从已经已经”It was/wont be+一段时间一段时间+before从句从句“过了过了才才.”beforebeforeafterhave beenbecameis/has beenbegantill 与与until:1.He lived with his parents _ he
7、graduated from He lived with his parents _ he graduated from college.college.2.Not _ he told me did I know the truth.2.Not _ he told me did I know the truth.3.The children _(will come)home until/till its 3.The children _(will come)home until/till its dark.dark.4.It was _ the war was over that he ret
8、urned to his 4.It was _ the war was over that he returned to his land.land.till/untiluntilwont comenot untilConclusion:1.位于句首时位于句首时.只能用只能用until,不用不用till.2.notuntil可改写为可改写为:It is/was not until that强调句强调句.3.not until放在句首,主句谓语要部分倒装。放在句首,主句谓语要部分倒装。一一就就ill._he saw the monster,he turned pale.The spy had _
9、 returned home than he was told to go to another country.We had _returned home when it rained._ had we begun when we told to stop.The moment/minute/As soon asno soonerhardly/scarcelyHardly/ScarcelyConclusion:hardlywhen,no soonerthan,scarcelywhen引导,从句引导,从句用过去完成时,主句用一般过去时。用过去完成时,主句用一般过去时。否定词否定词hardly,
10、scarely和和no sooner 位于句首时,从句要部分位于句首时,从句要部分倒装。倒装。二二.地点状语从句地点状语从句:where,anywhere,everywhere.You would let your children play where you can see them.because,as,since,for三三.原因状语从句原因状语从句:Conclusion:because语气最强,强调原因,既可以放在句首,也可以放在语气最强,强调原因,既可以放在句首,也可以放在句中。回答句中。回答“why”的提问。的提问。since表示表示“既然既然”,语气较弱;强调结果,只可以放在句
11、首。,语气较弱;强调结果,只可以放在句首。as语气最弱,强调结果,只可以放在句首。语气最弱,强调结果,只可以放在句首。for表示通过逻辑推断得出的原因。表示通过逻辑推断得出的原因。用because,as,since 与for填空:-Why are you crying,meg?-_ Ive broken your necklace,mom.2.I went to bed early _ I was tired.3.I was not kind to him_ he was rude.4._ I had a cold,I was absent from school.5.My mother wa
12、s ill and I sent for Tom,_ he was a doctor.6._ we are all here,lets begin our class.becausebecausebecauseAsforSinceConclusion:条件状语从句中一般用条件状语从句中一般用“主将从现主将从现”.虚拟语气在虚拟语气在If引导的条件状语从句的使用:引导的条件状语从句的使用:四四.条件状语从句条件状语从句:if,unless,once,as/so long as(只要)(只要),so far as(据据我所知我所知),If引导的从句引导的从句 主句主句与现在事实相反were/did
13、would/should/could+动词原形与过去事实相反had donewould/should/could+had done与将来事实相反were/didshould dowere to dowould/should/could+动词原形If I_(be)a bird,I would fly to you.If you _(leave)home a little earlier this morning,you _(catch)the bus._ bad weather stops me,I jog every day._ I arrive at Beijing,Ill call you
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