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1、精心整理A、引导原因状语从句的连词 原因状语从句一般由从属连词because,as,since，nowthat引导。B、because,as,since和nowthat的区别：1、because“因为”，表示直接的原因，语气最强。1）why提问的句子，必须用because回答。2）because的从句常放在主句之后。3）because不能与so连用。4）because+从句；becauseof+名词短语ImissedthetrainbecauseIgotuplate.Hewasangrynotbecausewewerelate
2、butbecausewemadeanoise.-Whydidn’thecomeyesterday??-Becausehewasill.2、as“因为”，语气较弱，一般放在主句前，中间用逗号隔开，表示的是明显的原因。Ashewasnotwell,Idecidedtogotherewithouthim.Asitwasraininghard,wehadtobeindoors.3、since/nowthat“既然”，一般放在主句前，中间用逗号隔开，表示的是明显的原因或众所周知的事实。Since/Nowthatthismethoddoe
3、sn’twork,let]stryanother.Since/Nowthatyoufeelill,you'dbetternotgotowork.C、for引导的并列句与原因状语从句的辨析并列连词for“因为”，引导的不是从句，而是并列分句，只能放在主句之后，不能放在句首，常用逗号把它和前面的分句隔开。对主句补充说明理由或推断原因。 Itrainedlastnight,forthegroundiswet.??????Shemusthavegoneoutearly,forshehadnotcomeforbreakfast.Exe
4、rcise:一、填入恰当的连词1.Ididn’tgotoschoolyesterday_________Iwasill.2.________everybodyishere,let’sbeginourmeeting.3.________youareinpoorhealth,youshouldnotstayuplate.4.Iaskedhertostaytotea,________Ihadsomethingtotellher.5.________allthepassengersarehere,whydon’twestartaton
5、ce?6.Billwon’tmakeanyprogress________hedoesn’tstudyharderthanbefore.7.Hemighthavegonetobed,________thelightwentout. 二、改写句子,保持句意不变1)Theshipchangeditscoursebecausetherewasastorm.Theshipchangeditscourse ____________________________.2)Becausehewasill,hedidn’tgotosch
6、ool.?Hewasill,_______hedidn’tgotoschool.3)Hecouldn'twalkbecausehislegwasbroken.Hecouldn'twalk____________his______leg.4)Icamebackbecauseitwasrainingheavily.?Icameback____________the______rain.三、课堂小结：___________________________________________________________________
7、___________________________________________________________________________________________页脚内容精心整理______________________________________________________________________________________________________________________________________________________________四、回家作业：一、
8、填入恰当的连词1.______youdonotunderstand,Iwillexplainagain.2.______Janewastheoldestinthisfamily,shehadtolookaftertheothers.3.Hemustbeill,______he
