八年级下英语unit7全单元课件[1](教育精品).ppt

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1、Unit 7Whats the highest mountain in the world?squaren.平方平方metern.米米deepadj.深的深的desertn.沙漠沙漠populationn.人口人口Asian.亚洲亚洲tourv.n.旅行旅行touristn.旅行者旅行者walln.墙墙amazingadj.令人大为惊奇的令人大为惊奇的ancientadj.古代的古代的wideadj.宽的；宽阔和宽的；宽阔和LanguageGoal:Talkaboutgeographyandnature一、用英语写出下列数字：一、用英语写出下列数字：ninety-eightthousandse

2、venhundredandfifty-fourNinehundredandeighty-threeExercisefivehundred(and)sixty-sixsevenhundredandnine566_709_983_98,754_练一练练一练345100118,657,421threehundredandforty-fiveonethousand(and)oneeighteenmillion,sixhundredandfifty-seventhousand,fourhundredandtwenty-one3,872Threethousandeighthundredandseventy

3、-two46,290 Forty-sixthousandtwohundredandninety58,230Fifty-eightthousandtwohundredandthirty59684,3219,648,215fivehundredandninety-sixeighty-fourthousandthreehundredandtwenty-oneNinemillion,sixhundredandforty-eightthousand,twohundredandfifteenQomolangmaabout9,600,000squarekilometersinsizeTheSahara1,0

4、25metersdeepTheCaspianSea6,671kilometerslongTheNile8,844.43metershigh1a.Matchthefactsyouknow.1.Qomolangmais_thananyothermountainintheworld.2.TheSaharais_desertintheworld.3.TheCaspianSeais_ofallthesaltlakes.4.TheNileis_riverintheworld.1b.Listenandcompletethesentences.higherthebiggestthedeepestthelong

5、est1c.Usetheinformationin1btomakeconversations.A:Whatisthehighestmountainintheworld?B:Qomolangma.A:Whatisthebiggestdesertintheworld?A:Whatisthedeepestsaltlakeintheworld?A:Whatisthelongestriverintheworld?B:Sahara.B:Caspian sea.B:Nile._ TheYangtzeRiverisabout_kilometerslongandtheYellowRiveris_kilomete

6、rslong._Chinahasthebiggestpopulationintheworld.ItsalotbiggerthanthepopulationoftheUS.2a.Listenandnumberthefacts1-4intheorderyouhearthem.6,3005,0005,46430024_Chinaisover_yearsold.IthasamuchlongerhistorythantheUS.TheUSisnoteven_yearsold._ChinaisalmostasbigastheUS,anditisthebiggestcountryinAsia.132b.Li

7、stenagainandfillintheblanksin2awiththenumbersinthebox._ TheYangtzeRiverisabout_kilometerslongandtheYellowRiveris_kilometerslong._Chinahasthebiggestpopulationintheworld.ItsalotbiggerthanthepopulationoftheUS.6,3005,0005,464300246,3005,464_Chinaisover_yearsold.IthasamuchlongerhistorythantheUS.TheUSisno

8、teven_yearsold._ChinaisalmostasbigastheUS,anditisthebiggestcountryinAsia.135,000300A:DidyouknowthatChinaisoneoftheoldestcountriesintheworld?B:Yes,Idid.Itsmucholderthanmycountry.2c.Makeconversationsusingtheinformationin2a.18,657,421eighteenmillion,sixhundredandfifty-seventhousand,fourhundredandtwenty

9、-one9,648,215Ninemillion,sixhundredandforty-eightthousand,twohundredandfifteen58,230Fifty-eightthousandtwohundredandthirty1.in size 在大小上在大小上2.one of the oldest countries 最古老的国家之一最古老的国家之一3.feel free to do sth.随意地做某事随意地做某事4.as far as I know 据我所知据我所知5.man-made objects 人造物体人造物体6.the highest mountain 最高的

10、山脉最高的山脉Guide：FeelfreetoaskmeanythingontodaysGreatWalltour.Tourist1：Howlongisthewall?Guide：Ah,themostpopularquestion!IfwereonlytalkingaboutthepartsfromtheMingDynasty,itsabout8,850kilometerslong.Thismakesitthelongestwallintheworld.2d.Role-playtheconversation.Tourist2:Wow,thatsamazing!Whydidtheanciente

11、mperorsbuildthewall?Guide:Themainreasonwastoprotecttheirpartofthecountry.Asyoucansee，itsquitetallandwide.AsfarasIknow,therearenoman-madeobjectsasbigasthis.Tourist3:IsBadalingpartoftheMingGreatWall?Guide:Yes,itsthemostfamouspart.theHimalayastheAmazonRiverparagraphn.southwesternadj.thickadj.includev.f

12、reezingadj.conditionn.takein喜马拉雅山脉喜马拉雅山脉亚马逊河亚马逊河段；段落段；段落西南的；西南方向的西南的；西南方向的厚的；浓的厚的；浓的包括；包含包括；包含冻冰的；结冰的冻冰的；结冰的条件；状况条件；状况吸入；吞入（体内）吸入；吞入（体内）succeedv.Japann.challengev.inthefaceofachievev.forcen.naturen.ocean n.thePacificOcean实现目标；成功实现目标；成功日本日本挑战；考验挑战；考验面对（问题、困难等）面对（问题、困难等）达到；完成；成功达到；完成；成功力；力量力；力量自然界；大自然

13、自然界；大自然大海；海洋大海；海洋太平洋太平洋1、run along 跨越跨越 2.freezing weather 冰冻的天气冰冻的天气3.take in air 呼吸空气呼吸空气4.the first people to do sth.第一个做某事的人第一个做某事的人5.in the face of difficulties 面临危险面临危险6.give up doing sth.放弃做某事放弃做某事7.achieve ones dream 实现某人的梦想实现某人的梦想8.the forces of nature 自然界的力量自然界的力量9.reach the top 到达顶峰到达顶峰10

14、.even though 虽然虽然;尽管尽管3a.Readthearticleandmatcheachparagraphwiththemainideas.Qomolangma the Most Dangerous Mountain in the World?Oneoftheworldsmostdangeroussportsismountainclimbing,andoneofthemostpopularplacesforthisistheHimalayas.TheHimalayasrunalongthesouthwesternpartofChina.Ofallthemountains,Qomo

15、langmarisesthehighestandisthemostfamous.Itis8,844.43metershighandsoisverydangeroustoclimb.Thickcloudscoverthetopandsnowcanfallveryhard.Evenmoreseriousdifficultiesincludefreezingweatherconditionsandheavystorms.Itisalsoveryhardtotakeinairasyougetnearthetop.ThefirstpeopletoreachthetopwereTenzingNorgaya

16、ndEdmundHillaryonMay29,1953.ThefirstChineseteamdidsoinI960,whilethefirstwomantosucceedwasJunkoTabeifromJapanin1975.Whydosomanyclimbersrisktheirlives?Oneofthemainreasonsisbecausepeoplewanttochallengethemselvesinthefaceofdifficulties.Thespiritoftheseclimbersshowsusthatweshouldnevergiveuptryingtoachiev

17、eourdreams.Italsoshowsthathumanscansometimesbestrongerthantheforcesofnature.Paragraph1SpiritofclimbersParagraph2AchievementsofclimbersParagraph3FactsanddangersParagraph1Listfourdangersforclimbers:thickcloudsSnowslide;Freezingweatherconditions;Heavystorm;3b.Readthearticleagainandcompletethechart.Para

18、graph2Listthreeachievements:1953-TenzingNorgayandEdmundHillarywerethefirsttoreachthetop;1960-ThefirstChineseteamdidso;1975theJapaneseJunkoTabeisucceededdoingso.Paragraphs1&3Listfourcomparisons:mostdangeroussport;mostpopularplaces;thehighestmountain;themostfamousmountain1.WherearetheHimalayas?2.Howhi

19、ghisQomolangma?3c.Answerthequestionsusinginformationfromthearticle.TheHimalayasrunalongthesouthwesternpartofChina.Itis8,844.43metershigh.3.Whydosomanypeopletrytoclimbthismountaineventhoughitisdangerous?4.Whatdoesthespiritoftheclimberstellus?Oneofthemainreasonsisbecausepeoplewanttochallengethemselves

20、inthefaceofdifficulties.Thespiritoftheseclimbersshowsusthatweshouldnevergiveuptryingtoachieveourdreams.Italsoshowsthathumanscansometimesbestrongerthantheforcesofnature.1.FeelfreetoaskmeanythingontodaysGreatWalltour.在今天的在今天的长长城游城游中，大中，大家尽家尽管管问我任何问我任何问问题，题，不要拘不要拘束束。feelfree是英语是英语口口语中一个常用表达。语中一个常用表达。若若

21、有人有人让你让你feelfreetodosomething,就是让你无需拘就是让你无需拘束，只管按照自己的意愿去做某事。束，只管按照自己的意愿去做某事。e.g.A:CanIuseyourbathroom?我可以用一下你的卫生间吗？我可以用一下你的卫生间吗？B:Yes,feelfree.可以，请随意。可以，请随意。Languagepoints2.AsfarasIknow,therearenoman-madeobjectsasbigasthis.据我所知，据我所知，再没有再没有像它这样像它这样大大的人造物的人造物体体了。了。asfarasIknow是一个是一个固固定的表达方式，还可以定的表达方式，

22、还可以说说sofarasIknow，意思是意思是“据我所知据我所知”。例如：例如：AsfarasIknow,Jacksgottwinsisters.就我所知，杰克有一对孪生姐妹。就我所知，杰克有一对孪生姐妹。Theyrenotcomingtoday,sofarasIknow.他们今天不来他们今天不来了了就我所知是这样的。就我所知是这样的。3.theMingGreatWall明长城明长城“明长城明长城”是指明朝时期为了防御北方游是指明朝时期为了防御北方游牧民族的骚扰，历时一百多年在北部地区牧民族的骚扰，历时一百多年在北部地区修筑的军事防御工程。这段长城东起辽宁修筑的军事防御工程。这段长城东起辽宁

23、虎山，西至甘肃嘉峪关，从东向西横贯多虎山，西至甘肃嘉峪关，从东向西横贯多个省、个省、直辖市、自治区，直辖市、自治区，全长约全长约8850千千米米，是现存历代长城遗迹中最完整、最坚，是现存历代长城遗迹中最完整、最坚固的。固的。4.Evenmoreseriousdifficultiesincludefreezingweatherconditionsandheavystorms.更加严峻的更加严峻的困困难包括极冷的天气状况和巨大的难包括极冷的天气状况和巨大的风风暴暴。1）difficulty既可作可数名词也可作不可数名既可作可数名词也可作不可数名词词，在此用作可数名词。，在此用作可数名词。作可数名词

24、时作可数名词时,difficulty通常用作复数通常用作复数，表示具体概念，即：表示具体概念，即：各种各样的各种各样的“困难；难题；难事困难；难题；难事”。例如：例如：Peoplelearninganewlanguagemayfacesomedifficulties.人们学习一门新的人们学习一门新的语语言言时可能会遇到一些时可能会遇到一些困困难。难。Ifyouhaveanydifficulties,youcancallmeforhelp.如果你遇到任何困难，给我打电话求助好了。如果你遇到任何困难，给我打电话求助好了。作不可数名词时，作不可数名词时，difficulty可译作可译作“困难；艰困难

25、；艰难；辛苦；费劲难；辛苦；费劲”，例如：例如：Hehadgreatdifficultyinfindinganewjob.他找新的他找新的工工作费作费了了很大劲。很大劲。.Wefoundthehousewithoutdifficulty.我们轻而易举地找到广那座房子。我们轻而易举地找到广那座房子。2）include表示表示“包括；包含包括；包含”，是一个，是一个及物动词。及物动词。例如：例如：Doesyourpriceofthebikeincludethislight?你们的车价包含这你们的车价包含这盏盏车灯吗？车灯吗？5.Thespiritoftheseclimbersshowsusthat

26、weshouldnevergiveuptryingtoachieveourdreams.这些这些登山者的精神向我们表明：我们绝不应该登山者的精神向我们表明：我们绝不应该放弃实现自己梦想的尝试。放弃实现自己梦想的尝试。1）giveupdoingsomething的意思是的意思是“放弃做放弃做某事；半途而废某事；半途而废”Hegaveuplearningathirdlanguageafterhegotthejob.他找到工作之后就放弃了对第三门语言的学习。他找到工作之后就放弃了对第三门语言的学习。2)achieveourdreams相当于相当于makeourdreamscometrue其中动词其中

27、动词achieve表示表示“（通过努力）实现；通过努力）实现；取得；获取；达到取得；获取；达到（梦想、成绩、成功、目梦想、成绩、成功、目的的)”等。等。例如：例如：Heachievedgreatsuccessinashorttime.他用很短的时间取得了极大的成功他用很短的时间取得了极大的成功。LinTaoachievedverygoodexamresults.林涛考试取得林涛考试取得了了很好的成绩。很好的成绩。一一写出下列单词的比较级和最高级写出下列单词的比较级和最高级fortable3.big4.happy5.cheap6.many7.difficult8.little fortable3

28、.big4.happy5.cheap6.many7.difficult8.littlebetterbestmoremostbiggerbiggesthappierhappiestcheapercheapestmoremostmoremostlessleast1.Lilygetsup_(early)thanLucy.2.Whichgoes_(slowly),TomorJim?3.Thisbookis_(interesting)thanthatone.earliermoreslowlymoreinteresting二二 根据所给词的适当形式填空根据所给词的适当形式填空4.Sheworks_(car

29、eful)inherschool.5.Whogoestobed_(late)Jim,TomorJack?6.Ithinkturkeyis_(delicious)ofall.themostcarefullylatestthemostdeliciousHomeworkCanyouthinkofmoreexamplestoshowisthemostintheworld?Competewithyourclassmates.Unit 7Whats the highest mountain in the world?GrammarFocusWhatsthehighestmountainintheworld

30、?Qomolangma.HowhighisQomolangma?Its8,844.43metershigh.Itshigherthananyothermountain.Whichisthedeepestsaltlakeintheworld?TheCaspianSeaisthedeepestofallthesaltlakes.DidyouknowthatChinaisoneoftheoldestcountriesintheworld?Yes,Idid.ItsmucholderthantheUS.4a.Fillintheblankswiththecorrectformsofthewordsinth

31、ebox.1.TheAmazonRiverisoneofthe_riversintheworld.Itsalittle_thantheYangtzeRiver.2.Qomolangmais8,844.43meters_.bigmuchpopularlongoldhighlongestlongerhighItsoneofthemost_placesforseriousmountainclimbers.3.Nooceanintheworldisas_asthePacificOcean.4.AlthoughJapanis_thanCanada,itis _smaller.popularbigolde

32、rmuche.g.Tworivers：_and_4b.Writetwocomparisonsabouttwotopics.Writetruefacts.theYangtzeRivertheAmazonRiverTheYangtzeRiverisalmostaslongastheAmazonRiver.TheAmazonislongerthantheYangtze,buttheYangtzeisthelongestriverinChina.Twocities：_and_1._2._Twoanimals：_and_1._2._4c.Writefivequestionsusingcomparison

33、s.Thenaskyourpartneryourquestions.1._2._3._4._5._Whatisthehighestbuildinginourcity?Whoistheoldestpeopleinourcity?Whatisthemostpopularstreetinourcity?Whatisthemostdeliciousfoodinourcity?Whereisthebusiestroadinourcity?GrammarFocus(一一)数词数词Numeral数词是用来表示事物的数目和顺序的数词是用来表示事物的数目和顺序的词。词。数词的分类：数词的分类：1.基数词基数词2

34、.序数词序数词3.分数词分数词今天我们先来学习一下基数词。今天我们先来学习一下基数词。1.1.复习复习1 1100100以内的所有数字。以内的所有数字。2.2.掌握百、千、万、十万、百万的掌握百、千、万、十万、百万的表达法。表达法。1、1-19的基数词one1two2three3four4five5six6seven7eight8nine9ten10eleven11twelve12thirteen13fourteen14fifteen15sixteen16seventeen17eighteen18nineteen192、2090等十位数twenty20thirty30forty40fifty5

35、0sixty60seventy70eighty80ninety90twenty-one21twenty-two22其它的十位数照此类推，如其它的十位数照此类推，如：thirty-one31forty-two42seventy-five75ninety-six963、百、千、万 百百hundred100onehundred200twohundred以此类推以此类推千千thousand1000onethousand2000twothousand英语里没有英语里没有“万万”这一单位，这一单位，万也用万也用thousand表示。如：表示。如：10000tenthousand一万一万20000twent

36、ythousand两万两万4、十万、百万十万的说法是：十万的说法是：100.000a(one)hundredthousand200.000twohundredthousandmillion百万百万a(one)million1,000,000twomillion2,000,000以此类推以此类推8,000,000eightmillion练一练练一练345100118,657,421threehundredandforty-fiveonethousand(and)oneeighteenmillion,sixhundredandfifty-seventhousand,fourhundredandtw

37、enty-one1.Theprojectlasted5yearsandcost2 billiondollars.2.TheChinesehavebeenmakingpaperfortwo thousandyears.3.One thousandpoundsisalotofmoney.表示确定数量时表示确定数量时用基数词用基数词+hundred，thousand，million，billion多位基数词读法多位基数词读法457890608389threehundredandeighty-ninefourhundredandfifty-seveneighthundredandninetysixhu

38、ndredandeight1）101999的的三三位位数数由由“百百位位数数and+两两位位数数组成组成”。如：如：325threehundredandtwenty-five 102onehundredandtwo635sixhundredandthirty-five2)三位数以上的数，从个位往前数，每三位数三位数以上的数，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加一个逗号，从后往前数的第一个逗号代表thousand,第二个逗号代表第二个逗号代表million,第三个逗号第三个逗号是是billion，注意，注意这几个词不能用复数形式，后这几个词不能用复数形式，后也不能加也不

39、能加and。例如：。例如：2,648twothousand,sixhundredandforty-eight16,250,064sixteenmillion,twohundredandfiftythousand,sixty-four确切数目与不确切数目的表达确切数目与不确切数目的表达：hundred,thousand,million,billion等前面有等前面有基数词，基数词，表示确切数目时，用单数，后直接表示确切数目时，用单数，后直接接复数名词；接复数名词；如：如：threehundredbooksonehundredpeoplefivethousandstudentssevenmilli

40、onstarts表示不确切数目时，这类词后加表示不确切数目时，这类词后加-s且与且与of连连用。用。如：如：hundredsofpeoplethousandsofstudentsmillionsofbirdsbillionsoflions注意：这类短语中，名词前如有定冠词、指注意：这类短语中，名词前如有定冠词、指示代词或形容词性物主代词时，可加示代词或形容词性物主代词时，可加of,但但表示的是范围。如：表示的是范围。如：twohundredoftheworkers工人中的二百（人）工人中的二百（人）GrammarFocus(二二)形容词的比较级和最高级形容词的比较级和最高级comparativ

41、esandsuperlativeswithadj.andadv.short-shortersmall-smallernicenicersafesafer-bigthinheavyheavierhappyhappierbigbiggerthinthinnerdeliciousmoredeliciousinterestingmoreinterestingimportantmoreimportantcarefully-morecarefullyquickly-morequicklyslowly-moreslowlyeasily-moreeasily大多数形容词和副词有三个等级：大多数形容词和副词有三

42、个等级：原级、比较级、最高级原级、比较级、最高级。一、一、形容词比较级的构成形容词比较级的构成 1.1.构成的不规则变化构成的不规则变化:2.2.构成的规则变化构成的规则变化:1.构成的不规则变化构成的不规则变化:e.g.good/wellbetterbestbad/badlyworseworstmany/muchmoremostlittlelessleastfarfarther/furtherfarthest/furthest2.构成的规则变化构成的规则变化:1)单音节词和少数双音节词一般在词尾单音节词和少数双音节词一般在词尾后加后加-er构成比较级构成比较级或或-est构成最高级构成最高级

43、.如：如：原级原级比较级比较级最高级最高级coldcoldercoldestbrightbrighterbrightestyoungyoungeryoungest2)以字母以字母e结尾的词只加结尾的词只加r或或-st构成构成比较级比较级和和最高级最高级。原级原级比较级比较级最高级最高级nicenicernicestfinefinerfinestlargelargerlargest3)重读闭音节词末尾只有一个辅音字母重读闭音节词末尾只有一个辅音字母时时,先双写这个辅音字母先双写这个辅音字母,再加再加-er或或-est。如如:bigbiggerbiggestthinthinnerthinnest4

44、)以以“辅音字母辅音字母+y”结尾的双音节词，结尾的双音节词，先改先改y为为i,再加再加-er或或-est。如：。如：easyeasiereasiesthappyhappierhappiest5)多音节词和部分双音节词在词前加多音节词和部分双音节词在词前加more或或most。如：。如：deliciousmoredeliciousmostdeliciousinterestingmoreinterestingmostinterestingimportantmoreimportantmostimportantcarefully-morecarefully-mostcarefullyquickly-

45、morequickly-mostquicklyslowly-moreslowly-mostslowlyeasily-moreeasily-mosteasily形容词形容词最高级最高级的构成的构成A:tall short quick thick light cool warm quiet wild calm the-esttalltallertallestB:heavy easy tidy dry busy happy healthy hungry earlyy-i-estC:largelatenice-st biggestD:bighothottestthin “双写双写”thinnestwe

46、t wettest fatfattestAdjectivedeliciousdangerousinterestingpopularbeautifulcarefulfriendlythemost-adj.Afortable3.big4.happy5.cheap6.many7.difficult8.little betterbestmore comfortable most comfortablebiggerbiggesthappierhappiestcheapercheapestmoremostmore difficult most difficultlessleast1.用法：英用法：英语语中

47、三者或三者以上相比中三者或三者以上相比较较，表示，表示“最最”这样这样的最高程度概念的最高程度概念时时，要用，要用“the+最高最高级级”的的结结构表示。构表示。这这种句式一般种句式一般带带有表有表示比示比较较的介的介词词短短语语，比如，比如:inourclass,ofthethree等。等。例如：例如：WangLinisthetallestinourclass.Thistheateristhecheapestofthethree.注意使用最高注意使用最高级时应级时应注意以下几点：注意以下几点：形容词的最高级形容词的最高级 (1)表示表示“最最之一之一”的句式，要用的句式，要用oneofthe

48、+形容形容词词最高最高级级+复数名复数名词词。例如例如:JingjiangHotelisoneofthebiggesthotelsinourcity.Lisaisnotoneofmybestfriends.(2)当最高当最高级级前面有物主代前面有物主代词词或名或名词词所有格所有格时时，不加定冠不加定冠词词the。例如：例如：TomisLucysbestfriend.Tuesdayisherbusiestday.(3)最高最高级级前可加序数前可加序数词词。例如：例如：TheYellowRiveristhesecondlongestriverinChina.(4)形容最高形容最高级级修修饰饰作表作

49、表语语或介或介词宾语词宾语的名的名词词，代代词时词时，被修，被修饰饰的的词词往往省略。往往省略。例如：例如：Heisthelaziest(student)inourclass.2.形容形容词词比比较级较级和最高和最高级级的构成的构成(1)规则变规则变化化a.一般情况下，一般情况下，单单音音节节或双音或双音节节的形容的形容词词比比较级较级直接加直接加-er,最高最高级级直接加直接加-est。如：。如：clevercleverercleverestcheapcheapercheapestfewfewerfewestsmallsmallersmallestyoungyoungeryoungestb.

50、以以-e结结尾的形容尾的形容词词，比，比较级较级+-r,最高最高级级+-st。如：。如：largelargerlargestnicenicernicestcutecutercutestc.以以辅辅音字母音字母+y结结尾的形容尾的形容词词，变变y为为i+er或或+est。busybusierbusiestheavyheavierheaviesteasyeasiereasiesthappyhappierhappiestdirtydirtierdirtiestd.以重以重读闭读闭音音节结节结尾，末尾只有一个尾，末尾只有一个辅辅音字母音字母结结尾的尾的词词，双写最后一个，双写最后一个辅辅音字母，再加音