单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,2018/4/19,#,原因状语从句及,because of,的用法,原因状语从句及because of的用法,状语从句主要用来修饰主句或主句的谓语状语从句,时间状语从句,地点状语从句,原因状语从句,目的状语从句,结果状语从句,条件状语从句,让步状语从句,比较和方式状语从句,Lead-in,状语从句主要用来修饰主句或主句的谓语状语从句时间状语从句地,Lead-in,Why was the teacher angry?,Because the girl was late for class.,Lead-inWhy was the teacher ang,Lead-in,The teacher was angry,because,the girl was late for class.,原因状语从句,主句,Lead-inThe teacher was angry b,Presentation,引导原因状语从句的从属连词主要的,有,because,as,since,原因状语从句是用来说明引起,主句这个结果的原因的从句。
Presentation引导原因状语从句的从属连词主要的原因,Presentation,指出句子的主句和原因状语从句I refuse to believe you because no one else,saw these aliens.,I refuse to believe you as no one else saw,these aliens.,I refuse to believe you since no one else saw,these aliens.,主句,原因状语从句,Presentation指出句子的主句和原因状语从句I r,Presentation,Because,As,Since,no one else saw these aliens,I,refuse to believe you.,观察一下句子，你们能得出什么结论？,结论：,当我们把从句放在句子开头时，,经常用逗号把从句和主句隔开PresentationBecauseno one else,Presentation,知识拓展,because,since,as,辨析,because,语势最强，用来表示说话人以为听话,人不知道的原因，回答,why,提出的问题。
当原,因是显而易见的或已为人们所知，就用,as,或,since,Presentation知识拓展because,sinc,Presentation,I didnt go because I was afraid.,因为我害怕所以我没有去例句,Since/As the weather is too bad,we have to,put off our journey.,由于天气太差，我们不得不推迟我们的旅行PresentationI didnt go becaus,Practice,Wed better hurry _ it is getting dark.,A.and B.but C.as D.unless,解析：句意：我们最好快点，因为天快黑了A.and,并且；,B.but,但是；,C.as,由于，因为；,D.unless,除非结合句意，故选,C,C,PracticeWed better hurry _,Practice,-He was late again today.Do you know why?,-_ he stayed up watching football,match too late last night.,A.Since B.As C.Because D.And,C,解析：,because,用来回答,why,的提问，表示直接,的原因。
根据上句的提问“,Do you know why”,故选,C,Practice-He was late again to,Practice,Police officers questions,1.Why was Tina sure that something landed in,the forest near the hills?,2.Why did you and Tina hide behind some,bushes?,3.Why did you run away?,4.Why did your father refuse to believe you?,Match the questions with the answers.,PracticePolice officers quest,Practice,We heard some voices speaking a strange,language.,B.She heard a loud noise last night.,C.No one else saw these aliens.,D.An alien saw us and made a terrible noise.,Toms answers.,Answer:,1.B 2.D 3.A 4.C,PracticeWe heard some voices s,Practice,Tina was sure that something landed in the forest,near the hills because she heard a loud noise last,night.,Use the questions and answers to complete the police officers notes with as,since or because.,Tom and Tina hide behind some bushes as An,alien saw,them and made a terrible noise.,1.because,2.as,Practice Tina was sure tha,Practice,Tom run away because they heard some voices,speaking a strange language.,3.because,4.since,Toms father refuse to believe him since no one else saw these aliens.,PracticeTom run away because t,Presentation,Find out the rules.,Im unhappy because of,your marks in the exam,.,They went to the forest because of,their curiosity,.,Tina woke up at midnight because of,a loud noise,.,She decided to explore the forest because of,it,.,Because of,后可以加名词或者名词短语,或者人称代词的宾格形式。
Rules:,PresentationFind out the rules,Presentation,because,引导的原因状语从句，而,because of,后加名词,或者代词，或者名词短语because,从句与,because of,短语可以相互转换because,和,because of,He cant come because he is ill.,He cant come because of his illness.,他因病不能来Presentationbecause引导的原因状语从句，而,Presentation,because,和,so,在汉语中因为所以一般情况是连用的，,但是英语中,because,和,so,一般不能连用因为下雨，所以我们呆在家里正：,Because it was raining,we stayed at home.,It was raining so we stayed at home.,误：,Because it was raining,so we stayed at home.,Presentationbecause 和so在汉语中因为,Practice,练习巩固,句子改错（画出句子中的错误部分，并改正）,Because he got up late this morning so he missed,the early bus.,2.He is very happy because his good marks in the,exam.,去掉,because,改为,because of,Practice练习巩固句子改错（画出句子中的错误部分，并改,Practice,直击中考,【2014,.,深圳,】,Why didnt you go to school yesterday?,_,my mother was in hospital and,I had to take care of her.,A.Then B.BecauseC.If,B,试题分析：,Then,那么，然后；,Because,因为；,If,是否，如果。
句意：昨天你为什么没有去上学？,因为我的母亲生病住院了，我不得不照顾她结合语境可知选,B,Practice直击中考【2014.深圳】B试题分析：Th,Practice,直击中考,【,2011.,扬州,】,He had to retire(,退休,)early,poor health,.,as,a result,B.because,C.so,D,.because of,试题分析：,as a result,因此，结果是；,because,因为，接从句；,so,因此；,because of,因为，接名词性短语句意：因为身体不适，他不得不提前退休结合语境可知选,D,D,Practice直击中考【2011.扬州】He had to,Practice,直击中考,【,2013.,苏州,】,Kelly Clarkson is so popular among,young people _ her beautiful voice.,because B.because of,C.instead D.instead of,B,试题分析,:,句意：凯力,.,克拉克森因其动听的歌喉而深受年轻人喜爱because,因为（后接从句），,because of,因为（后接短语），,instead,反而，,instead of,而不是,。
根据语境可知其深受年轻人欢迎是因为其动听的歌喉，故选,B.,Practice直击中考【2013.苏州】Kelly Cla,Practice,直击中考,【2012.,杭州,】-,Did you call Sara back?,-I didnt need to,_ well have a meeting together tonight.,A.though,B,.unless,C.because D.if,C,试题分析：,Though,虽然，尽管；,unless,除非；,because,因为；,if,是否，如果句意：,-,你喊萨拉回来了吗？,我不必因为我们今晚一起有个会议故选,C,Practice直击中考【2012.杭州】-Did y,Homework,Write sentences about the story on page 99 by,Using because of.,HomeworkWrite sentences about,【语法】M4U7-原因状语从句及because-of-的用法课件,。