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1、状语从句,1,PPT课件,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,2,PPT课件,1. 时间状语从句,3,PPT课件,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 difficultie
2、s, 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.,4,PPT课件,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 whil
3、e Jerry was giving a lecture.He sang as he went along,辨析：when / while / as,when,while, as , when均可,5,PPT课件,时间状语从句的破题方法,6,PPT课件,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 t
4、o experience that _ they are young. (2008上海)A. while B. until C. if D. before,真题演练,7,PPT课件,（1）until/till延续性动词+肯定语气：到为止e.g.Walk you come to a white house.非延续性动词+否定语气：到才开始 notuntile.g. We begin our discussion he came back.,其他引导词：,till,didnt,until,8,PPT课件,真题演练,1. A good storyteller must be able to hold
5、 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,9,PPT课件,(2)once, the moment, as soon as表示“一就”e.g. he goes, we can clean up.,Once,(3)
6、 before, after表示时间的先后e.g. I found his pen he had left.,after,10,PPT课件,真题演练,1. Adozenideaswereconsidered_thearchitectdecidedonthedesignof thebuilding. （2006上海）A.because B.before C.whether D.unless,11,PPT课件,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 I came to Beijing. . It is
7、(has been).+ since +一般过去时 five years I began to learn English.,“自以 来”,since,It is,since,12,PPT课件,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
8、D. have turned,13,PPT课件,2.条件状语从句,逻辑关系：引导词：e.g. You will pass the exam you work hard. = You will not pass the exam you dont work hard.,假设, if, unless (if not),not,unless,if,14,PPT课件, 在条件下：as long ase.g. I get my fathers permission, Ill go!,As long as,15,PPT课件,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
9、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,16,PPT课件,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,17,PPT课件,2. _ there is a snowstorm or some other bad weather, the mail always come
10、s on time. （2007上海春季）A. Because B. If C. When D. Unless,反面条件,18,PPT课件,3. 地点状语从句,常用引导词: _特殊引导词: _ _, Air will be heavily polluted there are factories. you go, you should work hard. Do you know I can buy a second-hand computer? He follows me I go.,where,wherever,anywhere,everywhere,where,Wherever,anyw
11、here,everywhere,19,PPT课件,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,20,PPT课件,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b
12、ecause，所表示的是直接理由，因果关系不能同so连用。,21,PPT课件,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。,22,PPT课件,for:e.g. It must have rained last night, for the ground is wet.,语气最弱，不能放在句首。,23,PPT课件,_ 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,24,PPT课件,状语从句,敬请期待：,25,PPT课件,
