初中英语复习之状语从句ppt课件.ppt
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1、英语语法,状语从句,状语从句的分类,1.时间状语从句,按照引导词分类:When,while,as:当时,在的同时When/As/While he was eating his breakfast,he heard the door bell.Since:自以来It has been two years since I came to Beijing.,从句动词为非延续性动词 whenThe boy cried when he saw his mother.从句动词为延续性动词 while,as,when均可while强调“在的同时”as强调“伴随”的状态Tom fell asleep whil
2、e Jerry was giving a lecture,辨析:when/while/as,时间状语从句的破题方法,真题演练,(2007上海)He transplanted the little tree to the garden _ it was the best time for it.A.where B.when C.that D.until,扩展练习,(2008上海)Are you ready for Spain?Yes.I want the girls to experience that _ they are young.A.while B.until C.if D.before
3、,其他引导词:(1)until/till延续性动词+肯定语气:到为止例:Walk till you come to a white house.非延续性动词+否定语气:到才开始例:We didnt begin our discussion until he came back.,是是非非,真题演练,(2003上海)A good storyteller must be able to hold his listeners curiosity _ he reaches the end of the story.A.whenB.unless C.after D.until,扩展练习,(2000上海)
4、My uncle _ until he was forty-five.A.married B.didnt get married C.was not marrying D.would marry,真题演练,(2006上海)Adozenideaswereconsidered_thearchitectdecidedonthedesignof thebuilding.A.because B.before C.whether D.unless,辨析:两种since的句型,(1)It be time since+非延续性动词例:They have been friends since they met
5、for the first time in London.解释:主句的动作从since的那一刻持续到现在(有已经很长时间了),(2)It be time since+延续性动词例:I have lived in Beijing since I worked in Shanghai.解释:主句的动作从since引导的从句中的持续性动作结束时持续到现在(没有已经很长时间了),扩展练习,That was really a splendid evening.Its been years _ I enjoyed myself so much.A.when B.that C.before D.since1
6、.逻辑推理:没有已经很长时间了2.It be since+延续性动词选D,They _ friends since they met in Shanghai.A.have made B.have become C.have been D.have turned1.since+非延续性动词主句的动作延续至今2.选择四个选项中的延续性动词选C,2.条件状语从句,逻辑关系:假设引导词:(1)假如:if,unless(if not)例:You will not pass the exam unless you work hard(你不会通过考试,除非你努力学习)=You will not pass t
7、he exam if you dont work hard(如果你努力学习,你就会通过考试),(2)在条件下:in case,on condition that,provided(that),supposing,suppose(that),as long as例:Providing I get my fathers permission,Ill go!(只要得到父亲的同意,我就去),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,in case,on condition that,provi
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