八年级下册英语沪教版Unit 7 The unknown-Gramma

Unit7Grammar增城区仙村中学列桂金

教学内容：

1.教学目标：语言知识：连词as,since和because的含义和用法；用becauseof陈述理由。语言技能：能够在具体的情境中正确使用原因状语从句或用becauseof陈述原因。学习策略：主动探究，善于发现语言的规律并能运用规律举一反三。2.重点：掌握because和becauseof的区别。3.难点:在实际运用中正确使用原因状语从句。前置作业根据Unit7MorepracticeandReading翻译下列四个句子。1.MywifeandIweresittingoutsidebecauseitwasawarmnight.2.Sincenooneelsesawthesealiens,Irefusetobelieveyou.3.I’msuresomethinglandedintheforestnearthehillsasIheardaloudnoiselastnight.4.Thespaceshipwasdamagedbecauseofacrash.

because,since,as,becauseof的相同处：

because,since,as和becauseof的不同处：

A.Adverbialclausesofreason.原因状语从句：在句中表示

（原因/结果）的从句叫原因状语从句。①观察例句：e.g.1.MywifeandIweresittingoutsidebecauseitwasawarmnight.2.Sincenooneelsesawthesealiens,Irefusetobelieveyou.3.I’msuresomethinglandedintheforestnearthehillsasIheardaloudnoiselastnight.由例句1、2、3所见，原因状语从句的常用引导词是

、

、

，这些连词都不能与

连用。原因becausesinceasso()1.

itwasraining,

theystayedathome.A.Because;so B.Because;/ C.Since;so D.As;so()2.______herdaughterhadn’tcomeback,______shelookedworried.A.Though,but B.But;/ C.Because;so

D.Because,/BD小组竞赛:用Ilike...because/since/as...造句以小组为单位，每位同学必须造一个或以上，5分钟为限时，根据准确度和造句多少加分。

再观察并找出例句1、2、3中的主句和从句,试试能否改变当前主句和从句的顺序。1.MywifeandIweresittingoutside

becauseitwasawarmnight.（

句）（

句）

2.Sincenooneelsesawthesealiens,Irefusetobelieveyou.（

句）（

句）

3.I’msuresomethinglandedintheforestnearthehills（

句）asIheardaloudnoiselastnight.（句）

主从从主主从Becauseitwasawarmnight,mywifeandIweresittingoutsideIrefusetobelieveyousincenooneelsesawthesealiensAsIheardaloudnoiselastnight,I’msuresomethinglandedintheforestnearthehills原因状语从句的位置：1.

（主/从）句放前

（主/从）句放后；2.

句放前时通常要用

号与

句隔开。主从从逗主1.JimmovedtoBeijingashegotagoodjobthere.2.BecauseIforgottobringmykey,Icannotgetintotheflat.3.SinceIfeltquitetiredtoday,Iwenttobedearly.4.TomlefthisChinesetextbookatschoolbecausehewasinahurry.AsJimgotagoodjobinBeijing,hemovedthere.IcannotgetintotheflatbecuaseIforgottobringmykey.IwenttobedearlysinceIfeltquitetiredtoday.BecauseTomwasinahurry,helefthisChinesetextbookatschool.

观察例句4:e.g.4.Whydidn’tyougo?Ididn’tgobecauseIwasafraid./BecauseIwasafraid.由例句4可知，由why提出的问题必须用

来回答。because()1.----Whydidn’tyougototheparty?----

Iwasn’tinvited.A.AsB.Since C.Because D.So()2.----

didyougetupsoearlyyesterdaymorning?----BecauseIwantedtodomorningexercise.B.When B.Why C.What D.WhereCB

Summary(原因状语从句)1.常用连词

,

和

引导的原因状语从句，不与

连用2.位置：①

②

;3.由why提出的问题必须用

来回答。becausesinceasso主从从，主becauseB.becauseof①观察例句1、2、3、4：e.g.1.Shedoesn'tgotoschoolbecausesheisill.2.Theywenttotheforestbecauseoftheircuriosity.3.Tinawokeupatmidnightbecauseofaloudnoise.4.Shedecidedtoexploretheforestbecauseofit.由例句1得知：because是

词，其后接

;由例句2、3、4得知：becauseof是复合介词，其后接

词、

词短语、

词宾格等。连句子名名人称代Haveatry:能把例句1的because改用becauseof吗？如果能，请写出改写后的句子：1.Shedoesn'tgotoschoolbecausesheisill.

Shedoesn'tgotoschoolbecauseofherillness.Dosomeexercises.(句型转换)1.Thestudentsdidn’tneedtogotoschoolbecausetherewasastorm.Thestudentsdidn'tneedtogotoschool

thestorm.2.Hecouldn'twalkbecausehislegwasbroken.Hecouldn'twalk

his

leg.3.Icamebackbecauseitwasrainingheavily.Icameback

the

rain.4.Myparentswereangrybecauseofmypoormarksintheexam.Myparentswereangry

Igotpoormarksintheexam.becauseofbecauseofbrokenbecauseofheavybecause②Summary(becauseof与because)1.because+

;2.becauseof+

/

短语/

词宾格等句子名词名词人称代Step8.Domoreexercises.一.中考链接：()1.ThetrafficpolicemantookawayJim’sdrive’slicense

hebrokethetrafficrulesofdrunkdriving.（2016广东中考）A.though B.because C.till D.and()2.Ididn’taccepthishelp

Iwantedtotryitmyself.（2016陕西中考）A.because B.though C.untilD.unless()3.Couldyouhelpmewithhousework

youarefreetoday?（2016无锡中考）A.since B.though C.unless D.untilBAA()4.Iamreallyproudofmygroup

we’realwaysdiscussingandsharingstudysecretstogether.Howimportantthegroupworkis!（2016山西中考）A.because B.though C.unless()5.Wedidn’tenjoytheday

theweatherwassobad.（2016杭州中考）A.because B.thoughC.unlessD.tillAA二.假如你在班上为同学做一个关于将来理想职业的调查，根据下列表格用英语描述调查结果和原因，运用上刚学的原因状语从句。DreamJobsandReasonsDifferentpeoplehavedifferentdreamjobsandtheirreasons.MyclassmateLily

NameDreamjobsReasonsLily作家喜欢阅读与写作Mark医生帮助病人让他感到快乐我............课堂小结：这节课我学到了:A.原因状语从句1.常用连词because,as和since引导的原因状语从句，不与so连用2.位置：①主从②从，主3.用why提问，用because回答B.becauseof与because1.because+句子2.becauseof+n/n短语/人称代词宾格Thankyou!Goodlucktoyou!八年级下Unit7Grammar评价练习一.单项选择（共10题，每小题5分，共50分）()1.Shewon’tgotothecinema

shehasalreadyseenthefilm.A.until B.if C.so D.because()2.

you’retired,you’dbetterstayathomeandhavearest.A.Since B.Or C.Though D.Till()3.----Whydidn’tyougototheparty?----

Iwasn’tinvited.A.As B.Since C.Because D.So()4.----DidyoucallJackback?----Ididn’tneedto

I’llseehimtomorrow.A.though B.because C.unless D.whenDACB()5.

wehavenomoney,wecan’tbuyit.A.Until B.Unless C.As D.Although()6.

itwasraining,

theystayedathome.A.Because;so B.Because;/C.Since;so D.As;so()7.Theywerelateforthemeeting

theheavyrain.A.becauseof B.becauseC.since D.as(