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1、 考點(diǎn)29 原因狀語從句 高考頻度：★★★★★ 原因狀語從句是表示原因或理由的，引導(dǎo)這類從句的最常用的連詞是because, since, as , now that（既然）等，for 表示因果關(guān)系時(shí)（它引導(dǎo)的不是從句）為并列連詞，語氣不如because強(qiáng)。 1. because引導(dǎo)的原因狀語從句 because表示人們不知道的直接的原因或理由，著重點(diǎn)在從句，其所引導(dǎo)的從句，為全句句意的中心所在。通常用于回答why引出的疑問句，語氣最強(qiáng)，除特別強(qiáng)調(diào)外，該從句一般位于主句后面。 I didn’t go abroad with her because I couldn’t

2、afford it. 我沒有和她一起出國是因?yàn)橘M(fèi)用太高。 Don’t scamp your work because you are pressed for time. 不要因?yàn)闀r(shí)間倉促而馬馬虎虎。 I wonder whether his hearing is okay _______________ he has turned the television up very loud. A. unless B. although C. until D. because 【答案】 D 2. as引導(dǎo)的原因狀語從句 as引導(dǎo)的原因狀

3、語從句所引出的理由在說話人開來已經(jīng)很明顯，或已為聽話人所熟悉而不需要強(qiáng)調(diào)，從句多位于主句之前，通?？梢院蛃ince換用，as語氣稍弱。 As I didn’t know the way，I asked a policeman. 我不認(rèn)識路，因而問警察。 As it is snowing, we shall not climb the mountain. 由于在下雪，我們不去爬山了。 1.___________ you weren’t there, I left a message. A.As B.When C.Though D.For 【答案】 A 【解析

4、】句意：因?yàn)槟悴辉谀莾海晕医o你留言了。此處應(yīng)用as引導(dǎo)原因狀語從句，故選A。when引導(dǎo)時(shí)間狀語從句；though引導(dǎo)讓步狀語從句；for用作并列連詞表原因時(shí)不能位于句首。 2. When my father goes somewhere, he always goes along with my mother, _____________ he doesn’t like going alone. A.though B.as C. while D.even if 【答案】B 【解析】句意：我爸爸去一些地方時(shí)總是和我媽媽一起，因?yàn)樗幌矚g一個人去。此處用as

5、引導(dǎo)原因狀語從句。though＂盡管＂；while＂當(dāng)……時(shí)＂；even if＂盡管＂。 3. since引導(dǎo)的原因狀語從句 since表示人們已知的事實(shí)，不許強(qiáng)調(diào)的原因，故常譯為“既然……”，通常位于主句前。since從句是次要的，重點(diǎn)強(qiáng)調(diào)主句的內(nèi)容，相當(dāng)于now that。 Since traveling by air is much faster, they decided to take a plane. 既然乘飛機(jī)旅行快得多，他們就決定坐飛機(jī)。 Since you won’t help me，I’ll ask someone else.你既然不幫我，那我就請別人幫忙。

6、 Mark needs to learn Chinese ________his company is opening a branch in Beijing. A. unless B. until C. although D. since 【答案】D　 4. now(that)引導(dǎo)的原因狀語從句 now(that)“因?yàn)?；既然”，通?？梢院蛃ince換用。其中that可省去，用來表示一種新的情況，再加以推論。 Now(that) you’ve passed your test you can drive on your own.你既已考試合格，就可以獨(dú)

7、自開車了。 I do remember，now (that) you mention it. 你這一提，我倒的確想起來了。 ________the term has come to an end, I am going to take a trip for relaxation. A. Now that B. Even if C.As though D. So that 【答案】A 【解析】句意：既然這個學(xué)期已經(jīng)結(jié)束了，我打算去旅行放松一下。now that既然，引導(dǎo)原因狀語從句，符合句意。 5. seeing (that)引導(dǎo)的原因狀語從句 seein

8、g (that)“鑒于；由于”，通常用于非正式文體。 Seeing (that) the weather is bad，we’ll stay at home.天氣不好，我們還是呆在家里吧。 6. in that引導(dǎo)的原因狀語從句 in that“因?yàn)?；基于……的理由”，可以和because換用，多用于正式文體，它所引導(dǎo)的原因狀語從句總是位于主句之后。 Advertisement is distinguished from other forms of communication in that the advertiser pays for the message to be deli

9、vered. 廣告不同于其他交際形式，因?yàn)榈菑V告的人要為其所提供的信息付費(fèi)。 I’m in a slightly awkward position, in that he’s not arriving until 10th. 我的處境有點(diǎn)難堪，因?yàn)樗柌艁怼? The Chinese language ________Western languages ________, instead of an alphabet, it uses characters which stand for ideas, objects or ideas. A. differs from; in

10、 which B. is different from; in that C. differs from; in what D. is different from; in where 【答案】B 【解析】考查動詞短語和連詞。表示“與……不同”可以用differ from…或be different from…；in that是固定連詞，引導(dǎo)原因狀語從句，表示“由于，因?yàn)椤?，故選B項(xiàng)。 題組一 能力過關(guān) 單項(xiàng)填空 1.Perhaps it was_____________ my father often published his poems in th

11、e newspapers that he became known through his literary works. A. before B. when C. if D. because 2. _____________fewer people send letters to one another, the number of people collecting stamps has been steadily in decline. A. Before B. Although C.As D. If 3.Why not stay at home

12、_____________the road is so slippery after the heavy snow? A. since that B. now that C. then that D. after that 4.________ you have got a job, you should learn to be independent of your parents. A. So B. Although C. Before D. Now that 5.The old man asked Lucy to move to another chai

13、r _____________he wanted to sit next to his wife. A. although B. unless C. because D. if 6. _____________ I can never persuade you to give up buying stocks(股票), I can only wish you good luck. A.When B.For C.Since D.Although 7. The play has remained a mystery ____________ the pr

14、oducer wants to surprise the audience. A.although B.because C.unless D.until 8. Mary felt sad over the loss of photos she had shot in Australia, ___________ that was a memory she especially treasured. A.as B.which C.when D.where 9. Enjoy the first hour of the day. This is v

15、ery important ___________ it sets the mood for the rest of the day. A.as B.if C.when D.where 10. I won’t attend the party to be held in Mary’s home, ____________ I won’t stay where I feel I’m not welcomed. A.now that B.so that C.because D.when 題組二體驗(yàn)真題 1. (20

16、17新課標(biāo)卷II改編)The damage is usually more serious on the first plant, but the neighbors, relatively speaking, stay safer because they heard the alarm and knew what to do. A. though B. unless C. before D. because 2.（2016北京卷單項(xiàng)填空）I really enjoy listening to music _______________ i

17、t helps me relax and takes my mind away from other cares of the day. A. because B. before C. unless D. until 題組一 能力過關(guān) 單項(xiàng)填空 1.D 【解析】分析句子結(jié)構(gòu)可知此處為強(qiáng)調(diào)句型，且被強(qiáng)調(diào)部分是原因狀語從句，故用because引導(dǎo)，其他選項(xiàng)不符合語境。 4.D 【解析】考查狀語從句。據(jù)語境，你"既然"有了自己的工作，就應(yīng)該獨(dú)立了。now that引導(dǎo)原因狀語從句，相當(dāng)于since。 5.C 【解析】句意：那個老人讓Lucy去坐另一張

18、椅子，因?yàn)樗氚ぶ拮幼：竺娴膹木浔硎驹?，故填because。 6. C 【解析】句意：既然我不能說服你放棄買股票，那我只能祝你好運(yùn)了。since在此引導(dǎo)原因狀語從句，意為＂既然＂，符合句意。for用作并列連詞表示原因時(shí)，不能位于句首。Zx.xk 7. B 【解析】考查狀語從句。句意：這部戲劇仍舊是一個迷，因?yàn)閯?chuàng)作者想給觀眾一個驚喜。A. although＂盡管＂引導(dǎo)讓步狀語從句；B. because＂因?yàn)椋⒁龑?dǎo)原因狀語從句；C. unless＂除非＂引導(dǎo)條件狀語從句；D. until＂直到＂引導(dǎo)時(shí)間狀語從句。故選B。 9. A 【解析】考查狀語從句。句意：享受一天中的第

19、一個小時(shí)。這很重要，因?yàn)檫@一個小時(shí)決定當(dāng)天其余時(shí)間的情緒。＂as＂在句中引導(dǎo)原因狀語從句。 10. C 【解析】考查狀語從句。句意：我不會去參加在瑪麗家舉辦的派對，因?yàn)槲也粫谖矣X得自己不受歡迎的地方。根據(jù)句意和句子成分可以看出，本空需要從屬連詞引導(dǎo)原因狀語從句，因此選C。 題組二體驗(yàn)真題 1.D 【解析】句意：對第一株植物的傷害比較嚴(yán)重，但是鄰旁的植物相對安全，因?yàn)樗鼈兟牭搅司嬷涝撟鍪裁?。根?jù)語境和句意可知，空后是前面的原因，是原因狀語從句，故選D。 2.A 【解析】考查原因狀語從句。句意：我非常喜歡聽音樂，因?yàn)樗茏屛曳潘?，使我不去想其他的事情。前后是因果關(guān)系，故選A。 7