Unit4TheWondersofNatureectionA(1a1d)课件人教版八年级英语下册

Unit4TheWondersofNatureSectionA1a-1dUnit4TheWondersofNatureLearningobjectives1.通过听、说、看等方式，获取并正确认读关于自然奇观的地理类词汇（如waterfall,desert,trench等），感知描述自然景观特征的词汇用法（如level,surface,depth等）。2.能辨析并熟练运用描述“地理之最”的形容词最高级和大数字，在语境中描述自然景观的面积、高度、深度等；3.通过讨论和合作交流，丰富对世界地理的认知，利用地理等跨学科知识辅助英语学习。单击此处编辑母版文本样式二级三级四级五级wonder

n.奇观；惊叹

v.琢磨；想知道measurementn.数量；测量squarekilometre平方干米below

prep.在......下面；低于

adv.在(或到)......下面level

n.高度；水平；程度surface

n.表面；表层NileRiver尼罗河AngelFalls天使瀑布MountQomolangma珠穆朗玛峰DeadSea死海SaharaDesert

撒哈拉沙漠MarianaTrench马里亚纳海沟Previewthenewwords&phrasesEngagementDoyouknowwhatnaturalplacestheyare?Whatamazingthingsdoyouknowaboutthem?1aMatchtheplaceswiththepictures.DeadSeaSaharaDesertNileRiverMarianaTrenchAngelFalls

MountQomolangmaWelcometoourgameshow!Today,it'sallaboutgeography.Answerasquicklyasyoucan!PreListeningCanyouguessoutwhatwearegoingtolistento?EngagementListentotheconversationandthinkaboutthequestionsbelow.1.WhatisthelatestmeasuredheightofMountQomolangma?A.8,848.43metresB.8,848.86metresC.8,844.43metresD.8,844.86metres2.HowlargeistheSaharaDesertinsize?A.About900,000squarekilometresB.About9,000,000squarekilometresC.About90,000,000squarekilometresD.About900,000,000squarekilometres3.HowdeepistheMarianaTrench?A.About416metresB.About8,848.86metresC.About11,000metresD.About9,000,000metresExplorationPlaceDescriptionMeasurementMountQomolangmathe________________intheworld_____________metreshighSaharaDesertthe_______________intheworldabout___________squarekilometresinsizeDeadSeathe________________onearth_______________metresbelowsealevelMarianaTrenchthe______________intheoceanabout___________metresdeephighestmountainbiggestdesertlowestplacedeepesttrench1b

Listentothegameshow.Completethedescriptionsoftheplaces.ExplorationPlaceDescriptionMeasurementMountQomolangmathe________________intheworld_____________metreshighSaharaDesertthe_______________intheworldabout_____________squarekilometresinsizeDeadSeathe________________onearth_______________metresbelowsealevelMarianaTrenchthe______________intheoceanabout___________metresdeep1c

Listenagain.Completethemeasurementsin1bwiththenumbersbelow.highestmountainbiggestdesertlowestplacedeepesttrench8,848.869,000,00041611,0004168,848.86,11,000,9,000,000Listeningtips：精听，边听边记录关键数据。Exploration数字单位梳理：百__________

千___________百万___________十亿___________三位数怎么读,例416：_________________________________________________三位以上数字怎么读，例1,234,567,890_______________________________________________________总结大数字的读法Explorationhundredthousandmillionbillion数字从后往前数，每三位标一个逗号,每个逗号之间读处数字单位hundred,billion等，每个百位和十位中间加and:onebillion,twohundredandthirty-fourmillion,fivehundredandsixty-seventhousand,eighthundredandninety.百位和十位中间加and:fourhundredandeightLookandsay①根据1b表格或以下表格内容，创建对话PlaceSpecialFeature(特点、特征)Length（长度）/Height（高度）NileRiverThelongestriverintheworld6,671kilometresAngelFallsThehighestwaterfallintheworld979metresEg：

A：What’sthe......placeintheworld/onearth?B：It’s.....A：Howhigh/long/low/big/deep....isit?B：......Elaboration1.Answerasquicklyasyoucan!as...asyoucan：固定结构，意为“尽可能……”2.Whatisthehighestmountainintheworld?Whatisthebiggestdesertintheworld?Whatis

thelowestplaceonEarth?Whereisthedeepestpointintheocean?形容词最高级用法构成：单音节词：high→highest,big→biggest,low→lowest,deep→deepest多音节词：interesting→themostinteresting规则：最高级前必须加the：thehighestmountain,thebiggestdesert常与表示范围的短语连用：intheworld,onEarth,intheoceanLanguagepointsA:Howhighisit?B:It'sabout8,848.86metreshigh.A:Howbigisit?B:It'sabout9,000,000squarekilometresinsize.A:Howlowisit?B:Itssurfaceis416metresbelowsealevel.A:Howdeepisit?B:It'sabout11,000metresdeep.疑问词How+形容词：用于询问事物的属性或程度，如高度、大小、深度等。回答时常用

数词+单位+形容词

或

介词短语

来表达具体信息：Languagepoints(the+)最高级(+名词)+in/of短语，

意为“……中最……的”。Ithinkspringisthebesttimeofayear.我认为春天是一年中最好的时节。Tonnyworks(the)hardestinClass5.托尼是五班学习最努力的oneofthe+形容词最高级+可数名词复数+in/of短语，意为“……中最……的……之一”。Zhengdingisoneofthemostbeautifulplacesintheworld.

正定是世界上最美的地方之一。the+序数词+形容词最高级+可数名词单数+in/of短语,意为“在…中是第几……的……”Asweallknow,theYellowRiveristhesecondlongestriverinChina.

众所周知,黄河是中国第二长河。。最高级（-est）的用法LanguagepointsElaboration8,848.869,000,00041611,000Sumupwhatyouhavelearned.英语数字的读法4168,848.8611,0009,000,000英语中，数字从后往前数，每三位标一个逗号。例：

10,000,000百位和十位中间加and小数点读作point,小数点后的数字逐个单独读出。thousandmillionElaborationSumupwhatyouhavelearned.I.根据英文读法写出数字1.sevenhundredandninety _______________2.ninethousand,fivehundredandsix _______________3.twelvemillion,fourhundredthousand _______________4.thirtypointtwofive _______________5.onehundredandeightpointzeroseven_______________6.twobillion,threehundredthousand _______________Evaluation