Unit7SectionA(1a2c)课件人教版八年级英语下册

大单元整体项目式教学：通过本单元的学习，完成保护世界瑰宝、中国瑰宝或家乡瑰宝的演讲稿。1.感受世界瑰宝之魅力：感受自然之美和动物之秀，以听说输入为主；2.探寻世界瑰宝之奥秘：对与珠峰和熊猫相关的多学科知识进行“探究”，同时学习和巩固相关语法知识；3.推广世界瑰宝之传承：推广自己小组要保护的世界瑰宝、中国瑰宝或家乡瑰宝，进行演讲，呼吁更多人保护大自然环境和动物。Unit7What’sthehighestmountainintheworld?SectionA1a-2c123掌握本课时词汇：square,meter,deep,desert,population,insize…能够听懂并谈论自然地理的句式：What’sthehighestmountainintheworld?,了解到我国和世界上一些“自然地理之最”。（学习理解）听懂有关谈论自然地理的话题，能够运用目标句式就“自然地理之最”展开对话，能够听懂并表达较大的数字来更准确的介绍相关地理知识；能够熟练运用形容词的比较级和最高级对事物进行描述。（应用实践）通过对中国以及世界相关地貌信息的描述和谈论，引导学生拓展掌握一些世界之最的地理知识；同时培养学生亲近自然、关爱自然、保护自然的情感态度。（迁移创新）Whichmountainishigherthananyotherintheworld?Whichdesertisthelargestdesertintheworld?

Whichriveristhelongestriverintheworld?Qomolangma.TheNile.TheCaspianSea.TheSahara.Whichisthedeepestsaltlakeintheworld?QomolangmaIt's8,848.86meters

high.It's8,848.86

meters

inheight.eightthousandeighthundredandforty-eightpointeightsixHowhighisit?thehighestmountainintheworldtheNileHowlongisit?It's6,671

kilometers

long.It's6,671

kilometers

inlength.sixthousandsixhundredandseventy-onethelongestriverintheworldthedeepestsaltlakeintheworldHowdeepisit?It's1,025

meters

deep.It's1,025

meters

indepth.onethousandandtwenty-fivetheCaspianSeatheSaharathebiggest

desert

intheworldHowbigisit?It'sabout9,000,000

square

kilometersinsize.Ithas/covers

9,000,000

squarekilometers.ninemillion1,034,507,890.12Howtoreadlargenumbers?

pointthousandmillionbillionandandonetwo1.要读一组长数字，可以先把这组数字分3个数字一组用逗号隔开。2.把长数字分为3个数字一组，用逗号隔开，从右到左，把第一个逗号看作thousand，第二个逗号看作million,第三个逗号是billion。英语里没有万和十万的表达，一万：tenthousand十万：onehundredthousand3.“and”在十位数和百位数之间出现，百位数没有数字时，thousand和十位数之间，and不省略4.小数点后面的数字按单个读。Matchthefactsyouknow.1aQomolangmatheNiletheCaspianSeatheSaharaabout9,000,000squarekilometersinsize1,025metersdeep6,671kilometerslong8,848.86metershigh=indepth=inlength=inheight

数字+单位词+形容词（long,wide,high,deep）=数字+单位词+in+名词（length,width,height,depth,size）长、宽、高、深、面积的表达方法Theriveris20meterswide.=Theriveris20metersinwidth.基数词+单位词+形容词（long,wide,high,deep等）基数词+单位词+in+名词（length,width,height,depth,size等）【拓展延伸】作定语时用合成词“数词-单位词单数–形容词”。Liangliangisan11-year-oldboy.Qomolangmais_____________thananyothermountainintheworld.TheSaharais_____________desertintheworld.TheCaspianSeais_______________ofallthesaltlakes.TheNileis_______________riverintheworld.higherthe

biggestthedeepestthelongestListenandcompletethesentences.1b=thehighestmountain=biggerthananyotherdesert=deeperthananyothersaltlake=longerthananyotherriver最高级：the+形容词/副词最高级+单数名词=形容词、副词比较级+than+anyother+单数名词Qomolangmaishigherthananyothermountainintheworld.比较级+thananyother+可数名词单数Point该结构意为“比其他任何一个……都……”，指同一范围内比较，表示最高级含义。Sheisthinnerthananyotherstudentinherclass.=Sheisthethinnestinherclass.other必不可少，用以将主语从比较对象中排除，避免逻辑矛盾。如果比较对象不在同一范围内或不属于同一类别，应用“形容词/副词比较级+thanany（任何的）

+可数名词单数”。ThePacificOceanislargerthananylakeintheworld.练一练Hulunbuirisbiggerthan_____________cityinChina.Hulunbuirisbiggerthan_____________cityinAnhui.anyotheranyHi,Patrick!Whatareyoudoingthesedays?Oh,Iamtravelingaroundtheworld.Howexciting!Whatisthehighestmountainintheworld?It’sQomolangma.HowhighisQomolangma?It's8,848.86metershigh.Usetheinformationin1btomakeconversations.1cQomolangmatheNiletheCaspianSeatheSaharaHowmuchdoyouknowaboutChina?1.HowoldisChina?It’sover5,000yearsold.2.What’sthelongestriverinChina?TheYangtzeRiver.3.What’sthelongestwallinChina?TheGreatWall.4.What’sthebiggestdesertinChina?Taklimakandesert.5.What’sthebiggestwaterfallinChina?HuangguoshuWaterfall.HowmuchdoyouknowaboutChina?Listenandnumberthefacts[1-4]intheorderyouhearthem.6,300 5,000 5,464 300____TheYangtzeRiverisabout________kilometerslongandtheYellowRiveris________kilometerslong.____Chinahasthebiggestpopulationintheworld.It’salotbiggerthanthepopulationoftheUS.____Chinaisover________yearsold.IthasamuchlongerhistorythantheUS.TheUSisnoteven________yearsold.____ChinaisaboutthesamesizeastheUS,anditisthebiggestcountryinAsia.42132ariverspopulationhistorysize6,300 5,000 5,464 300____TheYangtzeRiverisabout________kilometerslongandtheYellowRiveris________kilometerslong.____Chinahasthebiggestpopulationintheworld.It’salotbiggerthanthepopulationoftheUS.____Chinaisover________yearsold.IthasamuchlongerhistorythantheUS.TheUSisnoteven________yearsold.____ChinaisaboutthesamesizeastheUS,anditisthebiggestcountryinAsia.42132bListenagainandfillintheblanksin2awiththenumbersinthebox.6,3005,4645,000300Chinahasthebiggestpopulationintheworld.population

集体名词，“人口；人口数量”，

无复数形式。作主语时，谓语动词用第三人称单数形式。thepopulationof“……的人口数量”，人口“多”用large或big来修饰；

人口“少”用small来修饰。分数或百分数修饰population作主语时，谓语动词常用复数形式。询问人口数量：

What’sthepopulationof…?Howlargeisthepopulationof…?

不能用howmany或howmuch提问。你家乡的人口是多少？（翻译句子并写出同义句）What’sthepopulationofyourhometown?_________________________________________Howlargeisthepopulationofyourhometown?4.DidyouknowthatChinaisoneoftheoldestcountriesintheworld?宾语从句表示的内容是客观事实、真理或自然现象等，从句要用一般现在时。Hetoldmethattheearthislargerthanthemoon.例：他告诉我地球比月球大。主句that

引导的宾语从句～～～～～～～～～～～～～～～～～～～～～～～～～～MakecomparisonsbetweenChinaandtheUS.Usingtheinformationin2a.GroupworkriverspopulationhistorysizeChinaismucholderthantheUnitedStates.1.Chinahasthebiggestpopulationintheworld.ItisalotbiggerthanthepopulationofAmerica.

2.

Chinais5,000yearsold.Itisoneoftheoldestcountries.

3.

Americaislessthan300yearsold.Itisoneoftheyoungestcountriesintheworld.

4.

TheYangtzeRiveristhelongestriverinChina.Itis6,300kmlong.

5.

TheYellowRiveristhesecondlongestriverinChina.Itis

5,464kmlong.

6.

ChinaisthebiggestcountryinAsia.ItisthesamesizeasAmerica.(ItisasbigasAmerica)ConfidentHistoricIntelligentNobleAmbitiousCHINAChina

is

a

country

with

a

long

history

and

rich

resources.Beproudofourmotherland!1.______allthemountains,Qomolangmaisthemostfamous.A.In B.On C.To D.Of2.Maryisshorterthan_____girlinherclass.A.anther B.theotherC.anyother D.others3.Yaomingis______tallerthanKobe.A.more B.much C.alotof D.less4.Thebuildingis_______.A.100-meter-hig