Unit7SectionA（1a-2d）课件2021-2022学年人教版八年级英语下册

SectionAPeriod1(1a-2d)Unit7What’sthehighestmountainintheworld?squaremeterdeepdesertpopulationAsiafeelfreetourn.平方；正方形n.米；公尺adj.深的；纵深的n.沙漠n.人口；人口数量n.亚洲(可以)随便(做某事)n.&v.旅行；旅游NewwordstouristwallamazingancientprotectwideasfarasIknowman-maden.旅行者；观光者n.墙adj.令人大为惊奇的；令人惊喜的adj.古代的；古老的v.保护；防护adj.宽的；宽阔的就我所知人造的NewwordsCanyoureadthesenumbers?100100010,000100,0001,000,00010,000,000100,000,0001,000,000,0009,600,000onehundred一百

onethousand一千

tenthousand一万

onehundredthousand十万

onemillion一百万

tenmillion一千万

onehundredmillion一亿

onebillion十亿

1,300,000,00020,231twentythousand

twohundredandthirty-oneninemillion

sixhundredthousand

onebillionthreehundredmillionthousandmillionbillion数词的解读技巧如果在万位以下的话只要直接读出该数值即可。特大数字如果在万位以上的话，是通过三位三位的读，来读出数值。一般的排列顺序是从大到小：billion,million,thousand,hundred.这些英文的数值代表三位三位的进位读法，每次读完一个单元后，就加上这些数值。10010001,000,0001,000,000,000onehundred一百

onethousand一千

onemillion一百万

onebillion十亿

111,121,435,678billionmillionthousandonehundredandelevenbillion

onehundredandtwenty-onemillion

fourhundredandthirty-fivethousand

sixhundredandseventy-eight485644,32123,3571,243,233

thousand千hundred百

million百万forty-eightfivehundred

andsixty-fourfourthousand,threehundredandtwenty-onetwenty-threethousand,threehundredandfifty-sevenOnemillion,twohundredandforty-threethousand,twohundredandthirty-threebillion十亿Readthesenumbers！8,8446,6711,0259,600,000.43pointReadthesenumbers！ninemillion

sixhundredthousand

sixthousandsixhundredandseventy-oneonethousandandtwenty-fiveeightthousandeighthundredand

forty-fourpointfourthree8,8446,6711,0259,600,000thelargestthesmallestlarger

than

anyother

numbersmallerthan

anyother

number.43pointReadthesenumbers！larger

thantheother

numberssmallerthantheother

numbersLet’stalk!Whatdowelearninageographyclass?geographyLet’senjoythebeautyofnature!mountaindesertriverlakeoceansaltlake咸水湖freshlake淡水湖A:What’sthelongestriverintheworld?B:TheNileisthelongest.A:Howlongisit?B:It’sover6,671kilometerslong.A:Whatisthesecondlongestriverintheworld?B:TheAmazonisthesecondlongestriverintheworld.6,671kilometerssixthousandsixhundredandseventy-oneItisinAfrica.A:What’sthedeepestsaltlake

intheworld?B:TheCaspianSeaisthedeepestsaltlakeintheworld.

Itisdeeperthananyother

saltlake.A:Howdeepisit?B:Itis1,025metersdeep.

onethousandandtwenty-five1,025metersA:What’sthehighest

mountainintheworld?B:Qomolangmaisthehighestmountainintheworld.

Itishigherthananyother

mountain.A:Howhighisit?B:Itis8,844.43metershigh.

eightthousandeighthundredandforty-fourpointfourthree8,844.43metersItisinChina.A:What’s

thebiggestdesertintheworld?B:TheSaharaisthebiggestdesertintheworld.A:What’sthesizeoftheSahara?B:Itisabout9,600,000squarekilometersinsize.desert9,600,000squarekilometersItisinNorthAfrica.ninemillion

sixhundredthousand

面积1aMatchthefactsyouknow.Qomolangmaabout9,600,000squarekilometersinsizeTheSahara1,025metersdeepTheCaspianSea6,671kilometerslongTheNile8,844.43metershigh…metershigh(long,wide,deep…)…米高（长,宽,深…)e.g.Thewallis1.7metreswide.A:

Howhigh\tallisQomolangma?B:It’s8,844metershigh.PracticeA:HowbigistheSahara(insize)?B:It’sabout8,000,000squarekilometersinsize.A:

HowdeepisTheCaspianSea?B:It’s1,025metersdeep.A:

HowlongistheNeil?B:It’s6,671meterslong.

A:Howlong

istheNile?\WhatisthelengthofA:

Howwideisthewall?B:It’s1.7metreswide.问高度问大小（面积）问深度问长度问宽度1.Qomolangmais_________thananyothermountainintheworld.2.TheSaharais__________desertintheworld.3.TheCaspianSeais___________ofallthesaltlakes.4.TheNileis____________riverin

theworld.1bListenandcompletethesentences.higherthebiggestthedeepestthelongest＝Qomolangmaisthehighestmountainintheworld.Amazonisthesecondlongestriverintheworld.A:Whatisthebiggest/…intheworld?B:…is….A:Howdeep\wide\long\high…isit?B:Itis….Pairwork:chooseanypicturetoaskandanswer.8,844.43metershigh1,025metersdeep6,671kilometerslongabout9,600,000squarekilometersinsizeChinaisoneof__________countriesintheworld.It’sover______yearsold.Infact,it’soneofthefour________countriesintheworld.5,000AsChinese,howmuchdoyouknowaboutourmotherland?古老的，古代的theoldestancientTheYangtzeRiveristhethirdlongestriverintheworld,thefirstAsianriver.It’s6211.31kilometerslong.ItrunsintotheEastSeainShanghaifinally.TheYangtzeRiver___TheYangtzeRiverisabout______kilometerslongandtheYellowRiveris______kilometerslong.___Chinahasthebiggest

populationintheworld.It’salot

biggerthanthepopulationoftheUS.___Chinaisover______yearsold.Ithasamuch

longerhistorythantheUS.TheUSisnoteven____yearsold.___ChinaisalmostasbigastheUS,butitisthebiggestcountryinAsia.2aListenandnumberthefacts(1-4)intheorderyouhearthem.A:

WhatisthepopulationofChina?

B:Chinahasapopulationof1.3billion(十亿).

Howlarge

isthepopulationofChina?___TheYangtzeRiverisabout______kilometerslongandtheYellowRiveris______kilometerslong.___Chinahasthebiggest

populationintheworld.It’salot

biggerthanthepopulationoftheUS.___Chinaisover______yearsold.Ithasamuch

longerhistorythantheUS.TheUSisnoteven____yearsold.___ChinaisalmostasbigastheUS,butitisthebiggestcountryinAsia.2a&2b42136,3005,4645,000300Listenandnumberthefacts(1-4)intheorderyouhearthem.6,3005,0005,464300Makeconversationsusingtheinformationin2a.2cA:DidyouknowthatChinais

oneoftheoldestcountriesintheworld?B:Yes,Idid.It’smucholderthanmycountry.为什么前后时态不一样呢？修饰比较级还有哪些词呢？much,alot,far,alittle,abit,even,stillthatChinais…是know的宾语从句。尽管主句的动词是过去时态，但由于宾语从句陈述的是客观事实，所以从句仍用一般现在时。Chinahas_________peopleontheearth.Anditisthebiggestcountryin______.Everyyear,manytouristscometoChinaandvisit_______________.theGreatWallAsiathemost

中国的长城共有近一万公里，东起河北秦皇岛的山海关，西到嘉峪关，这是明代修筑长城的两个最大关口，北京境内的长城有600余公里，比较著名的有八达岭长城、金山岭长城、司马台长城、慕田峪长城、居庸关长城和箭扣长城等。TheGreatWall

TheGreatWall

Howlong?ItsoutlookWhy...?Themostfamouspart2dSkim2dandcompletethemindmap.TheMingGreatWall8850kilometerslongTallandwideToprotectthecountryBadalingpart可以随意做某事正如你所见据我所知tour在此处为名词，还可用作动词，意为“旅行，旅游”；其名词形式tourist意为“旅游者”protectsb./sth.from...保护某人/某物免受…主要原因bepartof

属于…的一部分Whathaveyoulearned?这节课你学到了什么？请简单总结。Summary2.对于物体长、宽、高、深度、面积等的表达

3.形容词和副词的比较级和最高级的用法

Wordsandphrases:

million,billion,insize,asfarasIknow,feelfreetodosth,abig/smallpopulation……---Howdeepisit?---It’s1,025metersdeep.Qomolangmaishigherthananyothermountain.TheAmazonisthesecondlongestriverintheworld.LanguagepointsQomolangmaishigherthananyothermountainintheworld.珠穆朗玛峰比世界上其他任何一座山都高。“比较级+thananyother+