原因狀語從句75498

原因狀語從句75498原因狀語從句75498/NUMPAGES10原因狀語從句75498原因狀語從句75498原因狀語從句原因狀語從句表原因，引導(dǎo)原因狀語從句的從屬連詞主要的有because,as,since,for，seeing(that),now(that),considering(that)，inthat等。以下逐一介紹常見的原因狀語從句的引導(dǎo)詞：because引導(dǎo)的原因狀語從句一般放于主句之后，because表示直接原因，語氣最強(qiáng)，最適合回答why引導(dǎo)的疑問句。例如：IdoitbecauseIlikeit.我做這件事是因?yàn)槲蚁矚g。注意：“not...because”結(jié)構(gòu)中的not否定的是because引導(dǎo)的整個(gè)從句，例如：Thecountryisnotstrongbecauseitislarge.國強(qiáng)不在大。since引導(dǎo)的原因狀語從句一般放于主句之前表示已知的、顯然的理由(通常被翻譯成“既然”)，較為正式，語氣比because弱。例如：Sinceyouarefreetoday,youhadbetterhelpmewithmymathematics.既然今天你休息，你最好幫我補(bǔ)習(xí)數(shù)學(xué)。注意：seeing(that)，now(that)，considering(that)，inthat這幾個(gè)詞匯與since引導(dǎo)的原因狀語從句意思相近，都表示“既然”。例如：Seeing(that)herefusedtohelpus,there’snoreasonthatweshouldnowhelphim.他既然曾經(jīng)拒絕幫助我們，我們現(xiàn)在沒有理由要來幫助他。Now(that)youaregrownup,youshouldnotrelyonyourparents.既然你長大了，就不應(yīng)該依靠你的父母了。Considering(that)everybodyishere,let’sbeginourdiscussion.既然大家都到了，我們就開始討論吧。Inthatheisill,hefeelsunabletodoit.因?yàn)橛胁?，他覺得做不了那件事。as引導(dǎo)原因狀語從句時(shí)表示附帶說明的“雙方已知的原因”，語氣比since弱，較為正式，位置較為靈活(常放于主句之前)。例如：Asitisraining,you’dbettertakeataxi.既然在下雨，你最好乘出租汽車。Asyouaretired,youhadbetterrest.既然累了，你最好休息一下。Iwenttobedearly,asIwasexhausted.我睡得早，因?yàn)槲医钇ＡΡM了。for引導(dǎo)的原因狀語從句并不說明主句行為發(fā)生的直接原因，只提供一些輔助性的補(bǔ)充說明，for引導(dǎo)的原因狀語從句只能放于主句之后并且必須用逗號(hào)將其與主句隔開。例如：Hecouldnothaveseenme,forIwasnotthere.他不可能見過我，因?yàn)槲也辉谀抢?。比較：because,since,as和forbecause語勢最強(qiáng)，表示不知道的原因用because，即說話人認(rèn)為聽話人不知道。因此because從句是全句最重要的部分，通常被放置于主語之后。當(dāng)原因是顯而易見的或已為人們所知，就用as或since。Ididn'tgo,becauseIwasafraid.Since/Astheweatherissobad,wehavetodelayourjourney.for雖然表示不知道的原因，但因語氣比because弱得多，是可說可不說的話，只能位于主語之后，這時(shí)，for是并列連詞，如果不是因果關(guān)系，而是對(duì)前面主語內(nèi)容加以解釋或推斷時(shí)，只能用for。Heisabsenttoday,because/forheisill.Hemustbeill,forheisabsenttoday.注1：除以上提到的大家比較熟悉的引導(dǎo)原因狀語從句的從屬連詞外，when有時(shí)也可引導(dǎo)原因狀語從句(when表示“既然”)Iwon’ttellyouwhenyouwon’tlisten.既然你不想聽，我就不告訴你了。注2：because習(xí)慣上不與so連用漢語習(xí)慣上說“因?yàn)椤浴?，但英語習(xí)慣上卻不能將so與because連用：因?yàn)橄掠?，所以我們呆在家里。正：Becauseitwasraining,westayedathome./Itwasraining,sowestayedathome.誤：Becauseitwasraining,sowestayedathome.注3：because從句與becauseof短語的轉(zhuǎn)換Because引導(dǎo)的原因狀語從句有時(shí)可與becauseof短語轉(zhuǎn)換，becauseof后加的原因可以為好或壞但最正規(guī)的還是becauseHecan’tcomebecauseheisill./Hecan’tcomebecauseofhisillness.他因病不能來。Isaidnothingaboutitbecausehiswifewasthere./Isaidnothingaboutitbecauseofhiswife’sbeingthere.因?yàn)樗拮釉谀莾?，我?duì)此事只字未提。[考題1]____you’vegotachance,youmightaswellmakefulluseofit.A.NowthatB.AfterC.AlthoughD.Assoonas[答案]A[解析]主句與從句之間存在因果關(guān)系，且“you’vegotachance”表示一個(gè)顯而易見的原因，因此應(yīng)選用表原因的nowthat。[考題2]Hefounditincreasinglydifficulttoread,____hiseyesightwasbeginningtofail.A.andB.forC.butD.or[答案]B[解析]“hiseyesightwasbeginningtofail”是“hefounditincreasinglydifficulttoread”的原因，因此本題應(yīng)選用可以表示原因的連詞for引導(dǎo)原因狀語從句。[考題3]Amancannotsmilelikeachild,____achildsmileswithhiseyes,whileamansmileswithhislipsalone.A.soB.butC.andD.for[答案]D[解析]下劃線處之后的句子補(bǔ)充說明“amancannotsmilelikeachild”的原因，應(yīng)選用for表原因。原因狀語從句練習(xí)題I.在下列句子的空格中填入適當(dāng)?shù)倪B詞(每空一詞)：1.________Janewastheeldest,shelookedaftertheothers.2.________youknowit,Iwon'trepeatit.3.Hedidn'theartheknockatthedoor________hewaslisteningtotheradio.4.—Whydidn'tyoucome?—________myfatherwouldn'tletme.5.________________everybodyishere,let'sbeginthediscussion.II.句型轉(zhuǎn)換(把下列復(fù)合句轉(zhuǎn)換為簡單句)：I)把從句簡化為becauseof結(jié)構(gòu)：1.Helayinbedbecausehehadcaughtabadcold.2.Hecouldn'twalkbecausehislegwasbroken.3.Icamebackbecauseitwasraining.4.Theystayedinbecausetheweatherwasbad.5.Wedidn'tgethometillaftermidnightbecausewehadmissedthebus.II)把從句簡化為分詞短語：6.Asheisawarmheartedman,heisalwaysreadytohelpothers.7.Ashesawnobodyin,hedecidedtoleaveanote.8.Becausehedidn'tunderstanditsmeaning,heaskedtheteachertoexplaintheword.9.AshehadlivedinBeijingformanyyears,heknewthecityverywell.10.AsIhavenotseenthefilm,Ican'ttellyouwhatIthinkofit.11.AstheywereinfluencedbyLeiFeng'sexample,theydidalotofgooddeeds.12.Ashewasbroughtupinthecountryside,hewasnotusedtothecitylife.III)把從句簡化為形容短語：13.Becausehewasafraidofbeinglateforclass,Bobrantoschoolasfastashecould.14.Ashewasfullofear,Crusoeleftthecaveinahurry.15.Ashewasanxiousforaquickdecision,thechairmancalledforavote.Key:I.1.As2.Since3.because4.Because5.Nowthat/SeeingthatII.1.Helayinbedbecauseofabadcold.2.Hecouldn'twalkbecauseofa/hishisbrokenleg.3.Icamebackbecauseoftherain.4.Theystayedinbecauseofthebadweather.5.Wedidn'tgethometillaftermidnightbecauseofmissingthebus.6.Beingawarm-heartedman,heisalwaysreadytohelpothers.7.Seeingnobodyin,hedecidedtoleaveanote.8.Notunderstandingitsmeaning,heaskedtheteachertoexplaintheword.9.HavinglivedinBeijingformanyyears,heknewthecityverywell.10.Nothavingseenthefilm,Ican'ttellyouwhatIthinkofit.11.InfluencedbyLeiFeng'sexample,theydida