高二英语选修6 unit 4教案6.doc

用心爱心专心

教案3人教选修6Unit4Globalwarming
Languagepoints
Teachingmaterial
NSEFCBook6——Unit4
TeachingAims
Tolearnsomenewwordsandphrases.
Tolearnsomecomplicatedsentencepatterns.
TeachingImportantPoint
Howtohelpthestudentstomastertheusageofsomeusefulwords,expressionsandsentences.
TeachingDifficultPoint
Howtoenablethestudentstograspandrememberthedetailedinformationofthe
readingmaterial.
TeachingProcedure
Teachingaids
Aprojector,andablackboard
Step1Revision
1.Retellthetext.
Step2Languagepoints
T:Nowlet’slearnsomelanguagepointsofthetext.
Slideshow
1.Itisarapidincreasecomparedtomostnaturalchanges.
1．vt.比较；对照。如：Compareyouranswerswiththoseatthebackofthebooktoseeiftheyareright.把你的答案同书后面的答案对照一下，看看是否正确。Myhandwritingcannotbecomparedwithmyfather’s.我的书法不能与我父亲的相比。
2．vt.喻为；比拟。如：Man’slifeisoftencompareddoacandle.
人生常被比为蜡烛。Shakespearecomparedtheworldtoastage.
莎士比亚把人世比做舞台。
compare…with…表示“把……与……相比（同类相比）”compare…to…表示“把……比做……（异类相比，比喻）”comparedto/with与……相比,只能作状语
2.Howhasthiscomeaboutanddoesitmatter?
comeabout:发生，造成相当于happen
WhenMotherwokeup,shedidn’tknowwhathadcomeabout.I’llneverunderstandhowitcameaboutthatyouwerelatethreetimesaweek.Doyouknowhowtheairaccidentcameabout?
3.Thereisnodoubtthat….
一、作不可数名词,作"疑惑;怀疑”
①肯定句中doubt多接whether(一般不用if代替)同位语从句。如:
There'ssomedoubtwhetherhe'llkeephispromise.他会不会信守诺言还难说。
Shehadherdoubtswhetherthenewbookwouldsellwell.她怀疑新书是否会畅销。
②否定句中doubt多接that同位语从句。如:
Thereisnodoubtthattheywillaskyouforhelp.毫无疑问,他们会请你帮忙的。
Ihavenodoubtthatyouwillsucceed.我毫不怀疑你会成功的。
二、作及物动词常用于下列句型中,作"怀疑;不能肯定;不大相信"解,一般不用进行时态。
①用于否定句或疑问句,后接that引导的宾语从句。如:
Idon'tdoubtthatheistellingthetruth.
我毫不怀疑他在讲真话。
Doyoudoubtthathewillwinthematch?
你怀疑他会赢这场比赛吗?
②用于肯定句,一般接whether或if引导的宾语从句.如:
Idoubtwhetherwewillmakeaprofitoutofit.我认为我们不可能从此事中获利。
Wedoubtifshewillbepersuaded.
我们不知道她会不会被说服。
4.Hefoundthattheamountofcarbondioxidekeeponincreasingduringthattime.
①amountn.数量
习惯用语：
anamountof相当数量的;一些修饰不可数名词
amountsof相当数量的;一些修饰不可数名词
largeamountsofmoney大量的金钱
②keepon继续+doingsth.
他们虽然很累了，还是继续工作。
Theykeeponworkingalthoughthey