原因狀語(yǔ)從句語(yǔ)法講解

A、 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)。B、 because,as,since和nowthat的區(qū)別：1、 because“因?yàn)椤?，表示直接的原因，語(yǔ)氣最強(qiáng)。why提問(wèn)的句子，必須用because回答。because的從句常放在主句之后。because不能與so連用。because+從句；becauseof+名詞短語(yǔ)ImissedthetrainbecauseIgotuplate.Hewasangrynotbecausewewerelatebutbecausewemadeanoise.-Whydidn'thecomeyesterday-Becausehewasill.2、 as“因?yàn)椤?，語(yǔ)氣較弱，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。Ashewasnotwell,Idecidedtogotherewithouthim.Asitwasraininghard,wehadtobeindoors.3、 since/nowthat“既然”，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/Nowthatthismethoddoesn'twork,let]stryanother.Since/Nowthatyoufeelill,you'dbetternotgotowork.C、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Ididn'tgotoschoolyesterday Iwasill. everybodyishere,let'sbeginourmeeting. youareinpoorhealth,youshouldnotstayuplate.Iaskedhertostaytotea, Ihadsomethingtotellher. allthepassengersarehere,whydon'twestartatonceBillwon'tmakeanyprogress hedoesn'tstudyharderthanbefore.Hemighthavegonetobed, thelightwentout.二、 改寫(xiě)句子,保持句意不變Theshipchangeditscoursebecausetherewasastorm.Theshipchangeditscourse .Becausehewasill,hedidn'tgotoschool.Hewasill, hedidn'tgotoschool.Hecouldn'twalkbecausehislegwasbroken.Hecouldn'twalk his leg.Icamebackbecauseitwasrainingheavily.Icameback the rain.三、課堂小結(jié)：四、回家作業(yè)：一、填入恰當(dāng)?shù)倪B詞 youdonotunderstand,Iwillexplainagain. Janewastheoldestinthisfamily,shehadtolookaftertheothers.Hemustbeill, heisabsenttoday.Theteachermustbestrictwithyou theywantyoutomakegreatprogress. yourfatheriswellagain,younolongerhaveanythingtoworryabout.Thedaybreaks, thebirdsaresinging. youareill,you'dbettergotoseethedoctor. shewaslateforclass,shehadtosaysorry.二、選擇恰當(dāng)?shù)拇鸢窽hemancan'tgetonthebus thereisnoroomonit.thoughB.becauseC.untilDsothat herdaughterhadn'tcomeback, shelookedworried.A.Because,/B.Because,soC.Though,butD.Though,/you'vegotachance,youmightmakefulluseofit.A.NowthatB.AfterC.AlthoughD.AssoonasHefounditdifficulttoread, hiseyesightwasbeginningtofail.A.andB.forC.butD.orAmancannotsmilelikeachild, achildsmileswithhiseyes,whileamansmileswithhislipsalone.A.soB.butC.andD.for五、學(xué)生反饋：（在完成回家作業(yè)的過(guò)程中存在的問(wèn)題）六、教師反饋：(在批改學(xué)生回家作業(yè)中發(fā)現(xiàn)的問(wèn)題)Keys：A、 引導(dǎo)原因狀語(yǔ)從句的連詞：because,as,since，nowthatB、 because,as,since和nowthat的區(qū)別：1、 because：“因?yàn)椤?，表示直接的原因，語(yǔ)氣最強(qiáng)。why提問(wèn)的句子，必須用because回答。because的從句常放在主句之后。because不能與so連用。because+從句；becauseof+名詞短語(yǔ)2、 as：“因?yàn)椤保Z(yǔ)氣較弱，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。3、since/nowthat：“既然”，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)。C、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