原因状语从句(教案)

原因状语从句教学目标：1.复习原因状语从句的用法2.掌握because,since,as,nowthat的区别3.for引导的并列句与原因状语从句的辨析教学重点：1.复习原因状语从句的用法2.掌握because,since,as,nowthat的区别3.for引导的并列句与原因状语从句的辨析教学难点：1.掌握because,since,as,nowthat的区别2.for引导的并列句与原因状语从句的辨析一、课前预习：认真预习《中考零距离—系统复习集》P132-133有关原因状语从句的知识点，系统了解原因状语从句的用法。二、课堂活动：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.Hewasangrynotbecausewewerelatebutbecausewemadeanoise.-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/Nowthatthismethoddoesn’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.Exercise: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’twestartatonce?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’tgotoschool.Hewasill,_______hedidn’tgotoschool.3)Hecouldn'twalkbecausehislegwasbroken.Hecouldn'twalk____________his______leg.4)Icamebackbecauseitwasrainingheavily.Icameback____________the______rain.三、课堂小结：____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________四、回家作业：一、填入恰当的连词1.______youdonotunderstand,Iwillexplainagain.2.______Janewastheoldestinthisfamily,shehadtolookaftertheothers.3.Hemustbeill,______heisabsenttoday.4.Theteachermustbestrictwithyou______theywantyoutomakegreatprogress.5._____yourfatheriswellagain,younolongerhaveanythingtoworryabout.6.Thedaybreaks,_____thebirdsaresinging.7.______youareill,you’dbettergotoseethedoctor.8.______shewaslateforclass,shehadtosaysorry.二、选择恰当的答案1.Themancan’tgetonthebus______thereisnoroomonit.A.thoughB.becauseC.untilDsothat2.______herdaughterhadn’tcomeback,______shelookedworried.A.Because,/B.Because,soC.Though,butD.Though,/3._______you’vegotachance,youmightmakefulluseofit.A.NowthatB.AfterC.AlthoughD.Assoonas4.Hefounditdifficulttoread,_______hiseyesightwasbeginningtofail.A.andB.forC.butD.or5.Amancannotsmilelikeachild,________achildsmileswithhiseyes,whileamansmileswithhislipsalone.A.soB.butC.andD.for五、学生反馈：（在完成回家作业的过程中存在的问题）____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________六、教师反馈：（在批改学生回家作业中发现的问题）____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________Keys：A、引导原因状语从句的连词：because,as,since，nowthatB、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。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。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。课堂练习：一、1.because2.Since3.As4.because5.Since6.because7.for二、1.becauseofthestorm2.so3.becauseofbroken4.becauseofheavy回家作业：一、1.since2.As3.for4.because5.Since6.for7.Since8.As二、1.B2.A3.A4.B5.D