原因状语从句54261.ppt

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,.,*,原因状语从句,Adverbial Clauses of Cause,.,一、,because,since,和,as,引导的原因状语从句,because,，,since,，,as,这三个词都可引导原因状语从句。,Because,表示,直接的原因或理由,，着重点在从句，用于回答,why,，语气最强，常译为“因为”。,Since,一般表示对方已知的、无须加以说明的,既成事实的理由,，全句中心在主句，语气比,because,弱，常译为“既然”,。,As,表示,十分明显的原因,，一般说明因果关系，着重点在主句，语气较弱，常译为“由于”。,Difference,.,1.The doctor told the patient to go on a diet,he was overweight.,A.on the condition of B.because C.for D.when,2.,the weather was fine,I opened all the windows.,A.As B.Because of C.For D.With,3.,you are leaving tomorrow,we can eat dinner together tonight.,A.For B.Since C.Before D.While,A,B,B,.,在,强调句式,中，若强调原因壮语从句，只能用,because,引导的从句。,Example:,It was,because,he was ill,that,he didnt go with us.,正因为他病了，他才没和我们一起去。,.,二、,for,和,because,，,as,，,since,的区别,4.The fuel must have been finished,the engine stopped.,A.since B.as C.because D.for,because,，,as,，,since,总是表示因果关系，而且语气较强；而,for,引导的是并列分句，它只是对前面的分句加以解释，说明推断的理由，并且,只能后置,。,We did not go out because it was raining.,（因为下雨，我们没有出去。）,It must have rained last night,for the ground is wet this morning.,（昨晚一定下雨了，因为今天早上地都是湿的。）,D,.,三、短语连接词引导的原因状语从句,5.,that my head had cleared,my brain was also beginning to work much better.,A.For B.Now C.Since D.Despite,I havent finished writing the report yet,Im lazy,I have no time.,我还没有写完报告，不是因为我懒，而是因为没有时间。,Translate a sentence:,B,not that,but that,.,四、某些介词词组引导的原因状语从句,6.He was not severely punished for his crime,that he was young.,A.on the ground B.in the case of,C.in view of D.on condition,by reason,for fear,for the reason,on the ground,A,.,.,because,，,since,，,as,这三个词都可引导原因状语从句。其中,because,语气较强,，主要用以回答由,why,引出的问句，,since,次之,，,as,最弱,。,since,和,as,表示的原因多是既成事实。若从句表示的原因还不是确定的事实，就不能用,since,。,Summary:,.,在原因状语从句中，,for,引导的从句并不说明主句行为发生的直接原因，只是提供一些补充说明，且,不可位于主句前,。,.,除了一般的连接词外，还可用短语连接词,&,某些介词词组如,by reason,等来引导原因状语从句。,.,