八年级英语下册Unit7Whatsthehighestmountainintheworld教学课件人教新目标版.ppt

Unit7Whatsthehighestmountainintheworld?,Part:TextReviewTingriCounty,Xigaz,TibetAutonomousRegion,ChinaRange:MahalangurHimal,HimalayasCoordinates:275917N,865531EFirstascent:29stMay1953,EdmundHillaryandTenzingNorgayNormalroute:southeastridge(Nepal),PracticeFillintheblankswiththeproperform.1.Lilygetsup_(early)thanLucy.2.Whichgoes_(slowly),TomorJim?3.Thisbookis_(interesting)thanthatone.4.Sheworks_(careful)inherschool.5.Whogoestobed_(late)Jim,TomorJack?6.Ithinkturkeyis_(delicious)ofall.,earlier,moreslowly,moreinteresting,themostcarefully,latest,themostdelicious,Extention:Expression1.theworldshighestmountain/thehighestmountainintheworld世界最高的山2.thelongestriver最长的河thesecondlongestriver第二长河3.thebiggestdesert最大的沙漠4.themostcommonanimals最普遍的动物5.themostpopulatedplace人口最密集的地方6.oneoftheoldestcivilizations/countries最古老的文明国家之一,Thiselephantweighsmanytimesmorethanthispanda.(200cmtaller/shorter,weighmuchmore/less,eatmuchmore/less,eatmanytimesmore),ThepandaisthenationaltreasureofChinaanditisasymbolofpeace.A“nationaltreasure”issomethingthatisimportanttoacountryshistoryorculture.,1.Thepanda_attheChengduResearchBaseareawakeveryearlyinthemorningto_breakfastforthebabypandas.2.In_,pandashavebecomeso_thattheyarenowasymbolofChina.3.Adultpandasdonothavebabiesvery_,andsomeofthebabiesonlyliveforashorttimebecauseof_.,keepers,prepare,often,illness,fact,popular,4.AspecialprograminChengduteaches_aboutwhypandasare_andhowtosavethem.5.TheChinesegovernmentishelpingto_thepandas.Scientistsalsowanttobetter_thehabitsofpandas.,children,endangered,save,understand,1.Qomolangmais8,844.43metershigh.珠穆朗玛峰高8844.43米。TheCaspianSeais1,025metersdeep.里海深1025米。TheNileis6,671kilometerslong.尼罗河长6671千米。“数词+量词+long(deep/heavy/high/tall/thick/wide.)”，是英语中表示计量的方法。MyEnglishteacheris1.82meterstall.我的英语老师高一米八二。,Part:KeyWords,Phrases阻止的发生*prevent/stopsb.fromdoingsth.用法相同,在主动语态中介词from可省略,被动语态中不能省略。keepsb.fromdoingsth.中的from无论在主动语态中还是在被动语态中都不能省略。,Practice1.他抬起胳膊,保护他的孩子免受伤害。Heraisedhisarmto_hischild_hurt.2.我们应该多植树以阻止沙尘暴的发生。Weshouldplantmoretreesto_thesandstorm_.,prevent/stop,happening,protect,from,16.Somekindsofwhalesareindangerbecausehumanscatchwhalesformeat,fatandoil.因为人们为了得到肉、脂肪和食用油而捕杀鲸鱼,一些种类的鲸鱼正处在危险中。beindanger处在危险中beoutofdanger脱离危险dangeru.n危险dangerousadj.危险的,Practice1.Somewildanimalsare_(处在危险中)becauseoftheflood.2.Its_(danger)toplayonthestreet.,indanger,dangerous,Part:GrammarFocus:Numeral,ComparativesandSuperlatives,1.Numeral数词是用来表示事物的数目和顺序的词。数词可分为基数词（cardinalnumbers）、序数词（ordinalNumbers）和分数词（fractionalnumeral）。这里单讲基数词。,(1)表示确定数量时用单数，后直接接复数词。c.num.+hundred/thousand/million/billion+n.(pl.)Theprojectlasted5yearsandcost2billiondollars.这项工程持续了5年、耗资$20亿。threehundredbooks三百本书fivethousandstudents五千个学生Chinaisoverfivethousandyearshistory.中国有超过5,000年的历史。,(2)表示不确切数目时，这类词后加-s且与of连用。hundredsofpeople上百号人thousandsofstudents上千学生Notice这类短语中，n.前如有定冠词、指示代词或形容词性物主代词时，可加of，但表示的是范围。twohundredoftheworkers工人中的二百（人）(3)三位数的读法由“百位数+and+两位数”组成。102:onehundredandone123:onehundredandtwenty-three,(4)三位数以上的数的读法，从个位往前数，每三位数加一个逗号。从后往前数的第一个逗号代表thousand，第二个逗号是million，第三个逗号是billion，这几个词不用复数形式，其后不加and。1024:onethousandandtwenty-four2,345:twothousand,threehundredandforty-five12,345,678:twelvemillion,threehundredandfourty-fivethousand,sixhundredandseventy-eight,(5)数词+量词+adj.(deep,high,long,wide,thick)onepointtwometersthick1.2米厚twometerslong2米长onethousandonehundredandtwenty-fivemetersdeep1,125米深eightthousandeighthundredandfortyfourpointfourthreemetershigh8,844.43米高ninemillionsixhundredthousandsquarekilometersinsize面积9,600,000平方千米,Practice.WritethefollowingnumbersinEnglish.1.567_2.609_3.67,890_,fivehundred(and)sixty-seven,sixhundredandnine,sixty-seventhousandeighthundred,andninety,4.98,765_5.9,876,513_,ninemillion,eighthundredand,ninety-eightthousandsevenhundred,andsixty-five,seventy-sixthousand,fivehundredandthirteen,.Choosethebestanswerfromthegivenchoices.1._treeswereplantedonthemountainlastyear.A.ThousandsofB.ThousandofC.FivethousandofD.Fivethousands2._peopleintheworldaresendingandreceivinge-mailseveryday.A.MillionofB.ManymillionsofC.SeveralmillionofD.Severalmillions,A,B,3.Canyouwritethenumbereighty-fivethousand,sixhundredandtwenty-six?Yes,itis_.A.856,126B.85,626C.185,626D.185,206,B,2.Comparatives&Superlativesofadj.&adv.大多数形容词和副词有三个等级：原级、比较级、最高级。(1)原级:常用结构as.as.像一样ZhangHongisastallasTom.张红和汤姆一样高。(2)Comparatives修饰比较级有much,alot,alittle,abit,even,far常用结构：形容词比较级+than.。than一词是比较级的标志。,ChinaismuchbiggerthanJapan.中国比日本大很多。HeistallerthanI.他比我高。比较级+and+比较级“越来越”Itsdarkeranddarker.天越来越黑了。The+比较级.,the+比较.“越就越”Themoreyouexercise,thebetteryouare.锻炼越多，身体越好。,构成的不规则变化:,构成的规则变化a.单音节词和少数双音节词一般在词尾后加-er构成比较级或-est构成最高级：calm,cool,cheap,few,high,light,quick,quiet,short,small,tall,thick,warm,wild,b.以字母e结尾的词只加r或-st构成比较级和最高级：close,cute,late,safe,white,c.重读闭音节词末尾只有一个辅音字母时,先双写这个辅音字母,再加-er或-est：fat,hot,red,sad,d.以“辅音字母+y”结尾的双音节词，先改y为i,再加-er或-est：busy,dirty,early,dry,heavy,healthy,hungry,lazy,pretty,tidy,ugly,e.少数以er,ow结尾的双音节词加-er,-est：low,f.多音节词和部分双音节词在词前加more或most：beautiful,careful,comfortable,creative,expensive,dangerous,difficult,easily,friendly,fluently,modern,popular,quickly,slowly,useful*少数单音节词也是这样，如pleased,tired。,(3)Superlatives英语中三者或三者以上相比较，表示“最”这样的最高程度概念时，要用“the+最高级(+of/in)”的结构表示。这种句式一般带有表示比较的介词短语，比如：inourclass,ofthethree等。WangLinisthetallestinourclass.Thistheateristhecheapestofthethree.,a.表示“最之一”的句式，要用oneofthe+adj.Superlatives+n.(pl.)。HiltonHotelisoneofthebiggesthotelsinourcity.Mikeisoneofmybestfriends.b.当最高级前面有物主代词或名词所有格时，不加定冠词the。TomisLucysbestfriend.Tuesdayisherbusiestday.c.最高级前可加序数词。TheYellowRiveristhesecondlongestriverinChina.,d.形容词最高级修饰作表语或介词宾语的n./pron.时，被修饰的词往往省略。Heisthelaziest(student)inourclass.Imnottheearliestarrivedhere.e.表示三者或三者以上比较，可用“Which/Who+superlatives,.,.or.?”表示。Whoisthetallest,Tom,Mike,orJack?f.superlatives+of/among(同类比较)in.(范围比较)Tomisthetallestofthethree.Tomruns(the)fastestinourclass.,Summary最高级，很容易，一般词尾加est。(cheap-thecheapest)词尾若有哑音e，直接就加st。(close-theclosest)重读闭音节，单辅音字母要双写。(big-thebiggest)辅音字母加y，记得把y变为i。(friendly-thefriendliest)多音节，themost加在前。(popular-themostpopular),Practice.Translation1.TheYangtzeRiveris_(第三长河)riverintheworld.2.TheAtlanticis_(第二大洋)oceanintheworld.3.LinTaois_(最细心的学生之一)intheclassbecausehenearlydoesntmakeanymistakes.4.Edisonwas_(最伟大的发明家之一)intheworld.,oneofthemostcarefulstudents,oneofthegreatestinventors,thethirdlongest,thesecondbiggest,.Completethesentences.1.HainanisaverylargeIsland.Itisthesecond_(large)islandinchina.2.Ourteacherisas_(busy)asbefore.3.Heis_(careful)amongus.4.LiLeijumped_(far)thanJim.5.Thebusierheis,the_(happy)hefeels.