初中英语状语从句课件-.ppt

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1、状语从句状语从句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1.1.时间状语从句时间状语从句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.

2、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

3、as he went along辨析：辨析：when/while/aswhenwhile,as,when均可时间状语从句的破题方法时间状语从句的破题方法判断主句和从句动作的延续性非延续性：when延续性：when,while,as同时 while伴随 as1.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 experie

4、nce that _ they are young.(2008上海)A.while B.until C.if D.before真题演练真题演练（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：其他引导词：真题演练真题演练1.A good storyteller must be able to hold his listeners curiosit

5、y _ 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

6、had left.真题演练真题演练1.Adozenideaswereconsidered_thearchitectdecidedonthedesignof thebuilding.（2006上海）A.because B.before C.whether D.unless 两种两种since的句型的句型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 En

7、glish.“自以 来”扩展练习扩展练习1.That was really a splendid evening.Its been years _ I enjoyed myself so much.A.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 turned2.2.条件状语从句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

8、.=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正面正面条件条件真题演练真题演练1.Small sailboats can easily turn

9、 over in the water _ they are not managed carefully.（2007上海）A.though B.before C.until D.if2._ 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反面条件反面条件3.3.地点状语从句地点状语从句常用引导词:_特殊引导词:_ _ Air will be heavily polluted where there are fac

10、tories.Wherever you go,you should work hard.Do you know anywhere I can buy a second-hand computer?He follows me everywhere I go.wherewhereveranywhereeverywhereWhere 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。真题演练真题演练4.原因状语从句原因状语从句(1)引导原因状语从句的连词有 _ _ _ _(2)because,sin

11、ce,as,for 用法比较：because:e.g.-Why are you late?-Because there is a traffic jam.becausesinceasnow 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 真题演练真题演练状语从句敬请期待：敬请期待：