高中原因状语从句及练习(含答案).pdf
高中原因状语从句及练习(含答案)2.原因状语从句 原因状语从句表示主句中动作或状态发生的原因或理由,可位于主句之前,之后或插在主句中间。主句表示结果,从句表示原因,主要 由 because,as,since,for,seeing(that),considering(that),now(that),in that,not.because 等引导。1)because“因为,as 由于”,since“既然”,for“因为”because意为“因为”,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。He is absent today because he is ill.当主句为否定句时,从句 because 须用逗号与主句隔开,否则容易引起歧义。I didnt visit him,because I wanted to borrow some books.我没去拜访他,因为我想借几本书。I didnt visit him because I wanted to borrow some books.我不是因为想借几本书才去拜访他的。as意为“由于”,表示十分明显的原因,所引导的从句常位于主句之前,有时也可位于主句之后,一般说明因果关系,着重点在主句,原因或理由只是附带说明,不用于回答 why 的问题,常用于口语。As it is snowing,we shall not go to the park.As this book is written in simple English,it is suitable for beginners.since意为“既然,由于”时表示对方已知的、无须加以说明的既成事实的理由,只是一个附带说明。since=as it is the fact that.全句中心在主句。如从句表示的原因不是确定的事实,就不能用 since,通常用 because.Since everybody is here,lets begin our discussion.Since you seem to know them,why dont you introduce me to them?for是一个并列连词,由 for 连结的表原因的句子常看作并列句,它只提供一些补充说明或对前一个分句加以解释,不可前置。与 because 不同的是:because 引导的从句位置可前可后,而for 引导的分句只能后置,且往往须用逗号或分号与前一个分句分开。I didnt go to see him,for a heavy snow was falling.The days were short,for it was now December.有时,for 引起的从句并不表示原因,而是表示一种推断或解释,而 because 则不能。Someone in the house must be ill,for a doctor has just come out.He couldnt have seen me,for I was not there.一、填入恰当的连词 1.I didnt go to school yesterday _ I was ill.2._ everybody is here,lets begin our meeting.3._ you are in poor health,you should not stay up late.4.I asked her to stay to tea,_ I had something to tell her.5._ all the passengers are here,why dont we start at once?6.Bill wont make any progress _ he doesnt study harder than before.7.He might have gone to bed,_ the light went out.1.because 2.Since 3.As 4.because 5.Since 6.because 7.for 二、填入恰当的连词 1._ you do not understand,I will explain again.but D.Though,/3._ youve got a chance,you might make full use of it.A.Now that B.After C.Although D.As soon as 4.He found it difficult to read,_ his eyesight was beginning to fail.A.and B.for C.but D.or 5.A man cannot smile like a child,_ a child smiles with his eyes,while a man smiles with his lips alone.A.so B.but C.and D.for 1.B 2.A 3.A 4.B 5.D 1._ nobody was very interested in it,they decided to cancel the trip.A.Even though B.As soon as C.While D.Seeing that 2._ our country has so many good table-tennis players,we have to decide on the best ones to take part in the game.A.Although B.Since C.If D.While 3.Not that John doesnt want to help you,_ its beyond his power.A.but that B.for that C.and that D.in that 4.Animals suffered at the hands of man_ their habitats were destroyed by people to make way for agricultural land.A.in which B.for which C.so that D.in that 5._ Tom has no interest in piano,there is no point pushing him to learn it.A.Now that B.In case C.Even if D.As if (D；B；A；D；A)1._ youve got a chance,you might as well make full use of it.A.Now that B.After C.Although D.As soon as 2.He found it increasingly difficult to read,_ his eyesight was beginning to fail.A.and B.For C.But D.or 3.A man cannot smile like a child,_ a child smiles with his eyes,while a man smiles with his lips alone.A.So B.But C.and D.for 4.I didnt go _ I was afraid.A.Since B.For C.Because D.Though 5._ it was raining,_ we stayed at home.A.Because,so B.Because,/C.Because,for D.If,so 6.I said nothing about it _ his wife was there.A.since B.so that C.because D.unless 7._ the weather is so bad,we have to delay our journey.A.before B.since C.till D.After 8._ it is raining,youd better take a taxi.A.before B.as C.till D.after 9.You shouldnt get angry just _ some people speak ill of you.A.since B.so that C.because D.unless 10._ you are here,youd better stay.A.before B.Now that C.till D.after 11.I hurried _I wouldnt be late for class.A.since B.so that C.as if D.unless 12.I saw Mr.Smith last Sunday.We had not seen each other _I left London.A.as B.before C.since D.till 13._ you are so weak,youd better stay at home.A.Since B.For C.Because D.Though 14.Im sorry youve been waiting so long,but itll still be some time _ Brian get back.A.before B.since C.till D.after 15.Did you return Freds call?I didnt need to _ Ill see him tomorrow.A.though B.unless C.when D.Because 16.Accustomed to_ the steep mountains,he had no difficulty reaching the top.A.climbing B.climb C.having climbed D.have climbed 17._ weve no money,we cant buy it.A.though B.unless C.when D.As 1-5:ABDCB 6-10:CBBCB 11-15:BCAAD AD
