原因狀語(yǔ)從句

1、原因狀語(yǔ)從句一、引導(dǎo)原因狀語(yǔ)從句的連詞原因狀語(yǔ)從句一般由從屬連詞because,as,since，nowthat引導(dǎo)。語(yǔ)氣由強(qiáng)至弱依次為：becausesinceasI cant get to sleep because of the noise outside. 由于外面聲音嘈雜我睡不著。Since As weve no money, we cant buy it. 由于我們沒(méi)錢，我們無(wú)法購(gòu)買它。Now that you are here, youd better stay. 你既然來(lái)了，最好還是留下吧(既來(lái)之，則安之)。二、because,as,since和nowthat的區(qū)別：1、bec

2、ause“因?yàn)椤保硎局苯拥脑?，語(yǔ)氣最強(qiáng)。1）why提問(wèn)的句子，必須用because回答。2）because的從句常放在主句之后。3）because不能與so連用。4）because+從句；becauseof+名詞短語(yǔ)ImissedthetrainbecauseIgotuplate.Hewasangrynotbecausewewerelatebutbecausewemadeanoise.-Whydidnthecomeyesterday?-Becausehewasill.He cant come because he is ill. / He cant come because of his

3、illness. 他因病不能來(lái)此外，在強(qiáng)調(diào)句型中，只能用because。例如： It was because I missed the early bus that I was late for school. 我上學(xué)遲到是因?yàn)槲覜](méi)有趕上早班汽車。 2、since/nowthat“既然”，語(yǔ)氣比because稍弱，一般放在主句前，中間用逗號(hào)隔開(kāi)，表示的是明顯的原因或眾所周知的事實(shí)。 Since/Nowthatyoufeelill,youdbetternotgotowork.Since he asks you, youll tell him why. 他既然問(wèn)你，那就告訴他為什么吧。 Since

4、 everyone is here, lets start. 既然大家都到齊了，我們就出發(fā)吧！3、 as“因?yàn)椤?，是常用詞，語(yǔ)氣最弱，它表示的“原因”是雙方已知的事實(shí)或顯而易見(jiàn)的原因，含義與since相同，但語(yǔ)氣更弱，沒(méi)有since正式，常譯為“由于，鑒于”從句多放置主句前Ashewasnotwell,Idecidedtogotherewithouthim.Asitwasraininghard,wehadtobeindoors.We all like her as she is kind. 我們都喜歡她，因?yàn)樗屏肌?As I had a cold, I was absent from sch

5、ool. 因?yàn)槲腋忻傲?，所以沒(méi)去上課。三、for引導(dǎo)的并列句與原因狀語(yǔ)從句的辨析并列連詞for“因?yàn)椤?，引?dǎo)的不是從句，而是并列分句，只能放在主句之后，不能放在句首，常用逗號(hào)把它和前面的分句隔開(kāi)。對(duì)主句補(bǔ)充說(shuō)明理由或推斷原因。Itrainedlastnight,forthegroundiswet.Shemusthavegoneoutearly,forshehadnotcomeforbreakfast.Exercise:一、填入恰當(dāng)?shù)倪B詞1.Ididntgotoschoolyesterday_Iwasill.2._everybodyishere,letsbeginourmeeting.3._yo

6、uareinpoorhealth,youshouldnotstayuplate.4.Iaskedhertostaytotea,_Ihadsomethingtotellher.5._allthepassengersarehere,whydontwestartatonce?6.Billwontmakeanyprogress_hedoesntstudyharderthanbefore.7.Hemighthavegonetobed,_thelightwentout.1.because 2.Since 3.As 4.because 5.Since 6.because 7.for 1._youdonotu

7、nderstand,Iwillexplainagain.2._Janewastheoldestinthisfamily,shehadtolookaftertheothers.3.Hemustbeill,_heisabsenttoday.4.Theteachermustbestrictwithyou_theywantyoutomakegreatprogress.5._yourfatheriswellagain,younolongerhaveanythingtoworryabout.6.Thedaybreaks,_thebirdsaresinging.7._youareill,youdbetter

8、gotoseethedoctor.8._shewaslateforclass,shehadtosaysorry.1.since 2. As 3. for 4. because 5. Since 6. for 7. Since 8. As二、選擇恰當(dāng)?shù)拇鸢?.Themancantgetonthebus_thereisnoroomonit.A.though B.Because C.until Dsothat2._herdaughterhadntcomeback,_shelookedworried.A.Because,/ B.Because,so C.Though,but D.Though,/3._

9、youvegotachance,youmightmakefulluseofit.A.Nowthat B.After C.Although D.Assoonas4.Hefounditdifficulttoread,_hiseyesightwasbeginningtofail.A.And B.for C.but D.or5.Amancannotsmilelikeachild,_achildsmileswithhiseyes,whileamansmileswithhislipsalone.A.so B.But C.and D.forBAABD目的狀語(yǔ)從句目的狀語(yǔ)從句:從句部分是用以補(bǔ)充說(shuō)明主句中謂語(yǔ)

10、動(dòng)詞發(fā)生的目的的狀語(yǔ)從句。常用的連詞有： that（以便），so that（以便）， in order that（為了；以便），Lest（免得;唯恐）， for fear that（生怕；以免） Say it louder(so)that everyone can hear you.大聲說(shuō)，以便大家都能聽(tīng)到你。 I am telling you that lest you should make a mistake. 我告訴你這一點(diǎn)，以免你搞錯(cuò)。 You must speak louder so that /in order that you can be heard by all.He wr

11、ote the name down for fear that(lest) he should forget it.Betty takes more clothes in case the weather is cold.學(xué)習(xí)目的狀語(yǔ)從句應(yīng)注意以下:(1)目的狀語(yǔ)從句中常含有can,could,may,might,should等情態(tài)動(dòng)詞。I got up early so that I could catch the first bus.我起得很早，目的是為了趕上頭班公共汽車。(2)在口語(yǔ)中so可以引導(dǎo)目的狀語(yǔ)從句。Well sit nearer the front so we can hea

12、r better.我們坐的靠前一點(diǎn)，因此，我們聽(tīng)得清楚一點(diǎn)?！咀⒁狻縤n order that與in order to的區(qū)別:in order that+從句in order to+動(dòng)詞原形 ( in order to后面加的那個(gè)不叫目的狀語(yǔ)從句，叫目的狀語(yǔ))in order to 為了，后接動(dòng)詞原形，做目的狀語(yǔ)。I get up early in order to catch the early bus.in order that 為了，后接從句，做目的狀語(yǔ)。I get up early in order that I can catch the early bus.如果表示“為了， 以便”

13、的目的狀語(yǔ)從句的主語(yǔ)與主句的主語(yǔ)相同， 可用in order to或 so as to取代該目的狀語(yǔ)從句， 注意體會(huì)以下例句： He hurried through his work in order to catch the train. 他匆匆干完手中的活， 為的是能趕上火車。I came so early as to catch the first train. 我起得早， 以便能趕上頭班火車。考題1 Id like to arrive 20 minutes early _ I can have time for a cup of tea. (2005北京) A. as soon as B. as a result C. in case D. so that 答案 D 考題2 Roses need special care _ they can live through winter. (2004) A. because B. so that C. even if D. as 答案 B 考題3 Leave your key with a neighbor _ you lock yourself out one day. (2007 A. ever since B. even if C. soon after D. in case 答案