八年级下Unit7SectionA课件1(1a2d)

Unit7SectionA11a—2d2)三位数以上的数

如：16,250,164sixteenmillion,twohundredandfiftythousand,onehundredandsixty-four多位基数词读法1)101~999的三位数由“百位数＋and+两位数组成”。

如：325threehundredandtwenty-five从右到左三逗开一逗是千二逗百万三逗是十亿thousand

million

billion/θ’aʊzənd//‘mɪljən//‘bɪljən/Canyoureadthem?9,600,0001,0256,6718,844.43Icanreadthem!9,600,0001,0256,6718,844.43

onethousandandtwentyfiveeightthousandeighthundredandfourty-fourpointfourthreesixthousandsixhundredandseventy-oneninemillionsixhundredthousandThesecondlongestriverintheworld-Doyouknowitsname?-ItisAmazon.-Doyouknowhowlongitis?Doyouknowtheseinterestingplaces?['æməzən]

亚马逊河

-It’sabout6,500kilometerslong.the

highestmountainintheworld.Howhighisit?Itis8,844metershigh.QomolangmaQomolangma[‘tʃəuməulɑ:ŋmə]

8844.43米珠穆朗玛峰Itisabout9,600,000squarekilometersinsize.TheSahara1.大小[C][U]What’sthesizeofthepark?2.尺码,号[C]Thisshirtisyoursize.[sə’hɑ:rə]

撒哈拉沙漠

9,600,000squarekilometersTheSaharaTheSaharaisthebiggestdesertintheworld.sizenHowbigistheSahara?Theworld’sdeepestsaltlakeHowdeepistheCaspian?Itis1,025meters

deep.TheCaspianSeaTheCaspianSea[‘kæspiən]

里海

1,025metersTheNileTheNileisthelongestriverintheworld?Itismorethan6,600kilometers

long.Itrunsthrough9countries.TheNile[naɪl]

尼罗河

6,600kilometersHowlongistheNile?ThelongestriverinAsia.TheYangtzeRiveristhelongestriverinAsia?

Itis6,300kilometers

long.TheYangtzeRiver['jæŋtsi]

长江

TheYangtzeRiver6,300kilometersHowlongistheYangtzeRiver?1aMatchthefactsyouknow.Qomolangmaabout9,600,000squarekilometersinsizeTheSahara1,025metersdeepTheCaspianSea6,671kilometerslongTheNile8,844.43metershighQomolangmaTheSaharaTheNileTheCaspianSeaQomolangma

is

8844.43meters

high.TheSahara

is…TheCaspianSea

is…TheNile

is…1aA:

HowhighisQomolangma?B:It’s8,844metershigh.ReadandfindA:HowdeepistheCaspianSea?B:It’s1,025metersdeep.A:HowlongistheNile?B:It’s6,671kilometerslong.A:HowbigistheSahara?B:It’sabout9,600,000squarekilometers

insize.如何描述物体的长宽高？长宽高表达方式结构1：“数词+数量单位+形容词（long,wide,tall,deep…）”YaoMingisover2meterstall.Theriveris50meterswide.It’s8,844metershigh.它有8,844米高。结构2：“基数词+数量单位+in+名词（length;width;height;depth…）twometerslong=twometersinlength2米长twofeethigh=twofeetinheight.2英尺高关注.数词+squarekilometer(s)数词+squaremeter(s)

insizePractice1.

HowhighisQomolangma?It’s8,844metershigh.2.HowbigistheSahara?It’sabout9,600,000squarekilometersinsize.3.How

deepistheCaspianSea?Itis1,025metersdeep.4.HowlongistheNile?It’s6,671kilometerslong.

Listenandcompletethesentences.1.Qomolangmais______thananyothermountainintheworld.2.TheSaharais____________desertintheworld.3.TheCaspianSeais____________ofallthesaltlakes.4.TheNileis_________riverintheworld.higherthebiggestthedeepestthelongestPlaySectionA1b.swfGuess1b

Qomolangmaishigherthananyothermountainintheworld.珠穆朗玛峰比世界上任何山都高.

“anyother+可数名词的单数”

其他任何一个【用法1】指在同一范围内除了某人或某物以外的其他任何人或物.常用于比较级。ShanghaiisbiggerthananyothercityinChina.【用法2】

“anyother+可数名词单数”

与“theother+可数名词复数互换，也可用最高级形式表达。Lucyismorecarefulthananyother

studentinherclass.=Lucyismorecarefulthantheother

studentsinherclass.=Lucyisthemostcarefulstudentinherclass.

但是，如果比较双方不属于同一类别或同意范畴，句中则不用other.①ShanghaiislargerthananycityinHebeiProvince.②Herubsfasterthananygirlinhisclass.③TheYangtzeRiverislongerthananyriverinJapan.④TomgetstoschoolearlierthananystudentinMike’sclass.Whatis

thehighest

mountainintheworld?Whatis

thelongest

riverintheworld?Whatisthebiggestdesertintheworld?Whatisthedeepestsaltlakeintheworld?Talkaboutthesepicturesinpairs.QomolangmaTheSaharaTheNileTheCaspianSea1c

ishigherthananyothermountainintheworld.It’s8,844.43metershigh.QomolangmaWhatdoyouknowabouttheseplaces?TheSaharaisthebiggestdesertintheworld.It’sabout9,600,000squarekilometersinsize.TheCaspianseaisthedeepestofallthesaltlakes.TheNileIt’s6,671kilometerslong.It’s1,025metersdeep.isthelongestriverintheworld.1b.+1a.1b.+1a.1b.+1a.TheYellowRiverislong.TheYangtzeRiverisalot

_______thantheYellowRiver.TheNileis____________ofall.TheYangtzeRiverisnot____long____theNile.=TheYangtzeRiverisnot_______thantheNile.theNiletheYangtzeRivertheYellowRiver6,6706,3005,500longerthelongestMakesentencesusingtheinformationintheforms.ExerciseasaslongerMountTaiishigh.MountHuangisalittle

_______than

MountTai.Qomolangmais____________ofall.MountTaiisnot___high___Qomolangma.=MountTaiisnot_______thanQomolangma.higherthehighestasashigherQomolangmaMountHuangMountTai8,8481,8641,5451.ThepopulationofSingaporeislarge.2.ThepopulationofMalaysiaismuch______thanthatofSingapore.3.ThepopulationofChinais_______ofall.4.ThepopulationofSingaporeisnot_____large____thatofChina.5.ThepopulationofSingaporeisnot_____thanthatofChina.SingaporeMalaysiaChina4,000,00020,000,0001300,000,000largerthelargestasaslargerListenandnumberthefacts[1-4]inthe

orderyouhearthem.__TheYangtzeRiverisabout_____kilometerslongandtheYellowRiveris________kilometerslong.__Chinahasthebiggestpopulationintheworld.It’salotbiggerthanthepopulationoftheUS.__Chinaisover_____yearsold.IthasamuchlongerhistorythantheUS.TheUSisnoteven___yearsold.__ChinaisalmostasbigastheUS,anditisthebiggestcountryinAsia.14322a___TheYangtzeRiverisabout_______kilometerslongandtheYellowRiveris____kilometerslong.___Chinahasthebiggestpopulationintheworld.It’salot

biggerthanthepopulationoftheUS.___Chinaisover______yearsold.IthasamuchlongerhistorythantheUS.TheUSisnoteven___yearsold.___ChinaisalmostasbigastheUS,butitisthebiggestcountryinAsia.

Listenagainandfillintheblanksin2awiththenumbersinthebox.

6,3005,0005,464300

6,3005,46442135,0003002bExplainationChinahasthebiggestpopulationintheworld.①population“人口数量”作主语时,谓语动词用

单数Thepopulation

ofthiscity

issixmillion②当主语时“人口的百分之几、几分之几”时，谓语动词常用复数形式。

70%ofthepopulationinChinaarefarmers

③表示人口"多"或"少"时,用"large"或"small"

ThepopulationofChinaisverylarge.中国人多

④指代population的代词要用that。ThepopulationofIndiaismuch____than____ofRussia.A.small,thatB.larger,itC.smaller,thatD.bigger,thatD⑤询问人口数量Howlarge…?

“

whatisthepopulationof…?”

HowlargeisthepopulationofCanada?

WhatisthepopulationofCanada?加拿大的人口有多少?⑥表示“某地有多少人口‖时，常用…hasapopulationof…句型Chinahasapopulationofmorethan1.3billion.It’salotbiggerthanthepopulationoftheUS.（中国）人口比美国多得多。(1)alot很多，非常做副词短语，修饰动词，放在动词之后。相当于verymuch.Itusuallyrainsalotatthistimeofyear.Heknowsalotaboutthisevent.(2)alot…很多；much…得多（修饰比较级）形容比较级前可用much,even,alittle,alot,abit等修饰词表示程度。Myclassroomisalittlebiggerthanyours.HisEnglishisalotbetterthanmine.IthasamuchlongerhistorythantheUS.（中国）比美国历史长得多。I’malittleolderthanTom.

Keyphrases1.平方千米2.在面积上3.所有的咸水湖中最深的4.世界上最高的山脉5.最多的人口6.比…大许多7....的人口8.一段比…长的多的历史9.和…一样大10.最古老的国家之一11.比…老得多squarekilometersinsizethedeepestofallthesaltlakes.the

highestmountainintheworld.thebiggestpopulationthepopulationoftheUSalot

biggerthanamuchlongerhistorythanasbigasoneoftheoldestcountriesmucholderthan

Makeconversationsusingtheinformationin2a.PracticeA:DidyouknowthatChinaisoneoftheoldestcountriesintheworld?B:Yes,Idid.it’smucholderthanmycountry.A:DidyouknowthatYangtzeRiveristhelongestriverinChina?B:Yes,Idid.It’s6,300meterslong.B:Wow!That’slong!2c2dReadtheconversationandanswerthequestions1.What’stheconversationabout?2.HowlongistheMingGreatWall?1.It’saboutatourtotheMingGreatWall.2.It’sabout8,850kilometerslong.Readtheconversationandanswerthequestions:3.Whichisthebiggestman-madeobjectsintheworld？4.WhichisthemostfamouspartoftheMingGreatWall?TheGreatWall.Badalingpartofthewall.2dRole-playtheconversation.Guide:Feelfreetoaskmeanythingontoday’sGreatTourist1.Howlongisthewall?Guide：Ah,themostpopularquestion!Ifwe’reonlytalkingaboutthepartsfromtheMingDynasty,it’sabout8,850kilometerslong.Thismakesit

thelongestwallintheworld.Tourist2:Wow,that’samazing!Whydidtheancientemperorsbuildthewall?Guide:Themainreasonwastoprotecttheirpartofthecountry.Asyoucansee,it’squitetallandwide.AsfarasIknow,therearenoman-made

objectsasbigasthis.Tourist3:IsBadalingpartoftheMingGreatWall?Guide:Yes,it’sthemostfamouspart.Walltour.PlaySectionA2d.swf正如你所看到的据我所知

人造的

明朝

随便，轻松保护他们的那部分的国土

古代的皇帝

2dGuide:________askmeanythingontoday’sGreatTourist1.How____isthewall?Guide：Ah,_____popularquestion!Ifwe’reonly_______theparts____theMingDynasty,it’sabout8,850kilometers_____.This____it________wallintheworld.Tourist2:Wow,that’s_______!Whydidthe____buildthewall?Guide:Themainreasonwas___protecttheir___ofthecountry.____youcansee,it’squitetalland____.________Iknow,thereareno______asbig___this.Tourist3:IsBadalingpart____theMingGreatWall?Guide:Yes,it’s_____famouspart.1.Feelfreetoaskmeanythingontoday’sGreatWalltour.在今天的长城游中，大家尽管问我任何问题，不要拘束。Languagepointsfeelfree是英语口语中一个常用表达。若有人让你feelfreetodosomething，就是让你无需拘束，只管按照自己的意愿去做某事。feelfreetodosth随意做某事CanIuseyourbathroom?Yes,feelfree.FeelfreetotalkwithMr.Lee,please.请尽管和李先生谈。2ancientadj.古代的古老的Mygrandmotheroftentellsmeoldancientstories.3protectv.保护protect…from/against保护…，使不受Sunglassesareusedforprotectingoureyesfromthesun.4.AsfarasIknow,therearenoman-made

objectsasbigasthis.据我所知，再没有像它这样大的人造物体了。man-made为合成形容词，意为“人造的”。与-made复合而成的形容词有：hand-made(手工制作的)ho