初中英语状语从句 ppt课件.ppt
状语从句,1.What is it?,用来修饰主句或主句的谓语,2.what are the sorts?,时间状语从句 条件状语从句 地点状语从句 原因状语从句 让步状语从句 目的状语从句 结果状语从句 比较状语从句,1.时间状语从句,Examples:,When/As/While he was eating his breakfast,he heard the door bell.It has been two years since I came to Beijing.Whenever we met with difficulties,they came to help us.I got in touch with him immediately I received his letter.My sister came the moment she got my message.Every time I catch a cold,I have pain in my back.,从句动词为非延续性动词:The boy cried when he saw his mother.从句动词为延续性动词:while强调“在的同时”as强调“伴随”的状态，“一边一边”Tom fell asleep while Jerry was giving a lecture.He sang as he went along,辨析：when/while/as,when,while,as,when均可,时间状语从句的破题方法,1.He transplanted the little tree to the garden _ it was the best time for it.（2007上海）A.where B.when C.that D.until2.Are you ready for Spain?Yes.I want the girls to experience that _ they are young.(2008上海)A.while B.until C.if D.before,真题演练,（1）until/till延续性动词+肯定语气：到为止e.g.Walk till you come to a white house.非延续性动词+否定语气：到才开始 notuntile.g.We didnt begin our discussion until he came back.,其他引导词：,真题演练,1.A good storyteller must be able to hold his listeners curiosity _ he reaches the end of the story.（2003上海）A.whenB.unless C.after D.until2.My uncle _ until he was forty-five.（2000上海）A.married B.didnt get married C.was not marrying D.would marry,(2),once,the moment,as soon as表示“一就”e.g.Once he goes,we can clean up.,(3),before,after表示时间的先后e.g.I found his pen after he had left.,真题演练,1.Adozenideaswereconsidered_thearchitectdecidedonthedesignof thebuilding.（2006上海）A.because B.before C.whether D.unless,两种since的句型,since：.主句用现在完成时（或现在完成进行时）时，从句中用一般过去时e.g.Ive lived here since I came to Beijing.It is(has been).+since+一般过去时It is five years since I began to learn English.,“自以 来”,扩展练习,1.That was really a splendid evening.Its been years _ I enjoyed myself so much.when B.that C.before D.since2.They _ friends since they met in Shanghai.A.have made B.have become C.have been D.have turned,2.条件状语从句,逻辑关系：引导词：e.g.You will not pass the exam unless you work hard.=You will not pass the exam if you dont work hard.,假设,if,unless(if not),在条件下：as long ase.g.As long as I get my fathers permission,Ill go!,条件状语从句题的破题方法,1.读题，确认从句和主句2.分析从句和主句之间的逻辑关系（正面条件/反面条件）3.根据逻辑关系选择合适的引导词正面条件：if,as long as反面条件：if not,unless,正面条件,真题演练,1.Small sailboats can easily turn over in the water _ they are not managed carefully.（2007上海）A.though B.before C.until D.if,2._ there is a snowstorm or some other bad weather,the mail always comes on time.（2007上海春季）A.Because B.If C.When D.Unless,反面条件,3.地点状语从句,常用引导词:_特殊引导词:_ _,Air will be heavily polluted where there are factories.Wherever you go,you should work hard.Do you know anywhere I can buy a second-hand computer?He follows me everywhere I go.,where,wherever,anywhere,everywhere,Where there is a will,there is a way._ 无论你去哪里,我都去。_,Wherever you go,I go too,有志者事竟成。,真题演练,4.原因状语从句,(1)引导原因状语从句的连词有 _ _ _ _(2)because,since,as,for 用法比较：because:e.g.-Why are you late?-Because there is a traffic jam.,because,since,as,now that,语气最强，回答why时用because，所表示的是直接理由，因果关系不能同so连用。,since/now that:e.g.Since you have got enough money with you now,you can come and buy it next time.as:e.g.As he had been ready for the worst,he was not disappointed at the result.,“既然.”表对方已知的事实或理由，常放在句首。,“由于.”语气较弱，较口语化，表明显的原因或已知的事实，常放在句首。,for:e.g.It must have rained last night,for the ground is wet.,语气最弱，不能放在句首。,_ everybody knows about it,I dont want to talk any more.（2009上海）A.For B.Even C.Since D.However,真题演练,状语从句,敬请期待：,
