八年级上册人教版英语上课课件Unit4第3课时（SectionA3a-3c）

人教版·八年级英语上册授课老师：王老师Unit4AmazingPlantsandAnimals第3课时SectionA(GrammarFocus3a-3c)Watchthevideo

Lead-inWhatdoesthisvideotalkabout?World’sRecordsCanyouexpresstheseworld’srecordsinonesentence?MountEverestisthehighestmountainintheworld.TheNileRiveristhelongestriverintheworld.TheSaharaDesertisthelargesthotdesertintheworld.ThinkandsayThebluewhaleisthelargestanimalintheworld.TheMarianaTrenchisthedeepestplaceintheworld’soceans.TheGreatWallisthelongestman-madestructureintheworld.Canyouexpresstheseworld’srecordsinonesentence?

Thebluewhaleisthelargestandheaviestanimalintheworld.Thebiggest

landanimalintheworldistheAfricanelephant.Thecheetahrunsthefastestamongalllandanimals.Ithinkthemostusefulplantintheworldisbamboo.Itisperhapsthemostinterestingplantintheworld.Readthesentencesandnoticethewordsinbold.Whatarethewaystoformasuperlativeadjectiveoradverb?3aTranslateallthesentences.n.陆地；土地v.降落；着陆

adj.非洲的；非洲人的n.非洲人

PresentationThebluewhaleisthelargestandheaviestanimalintheworld.ThebiggestlandanimalintheworldistheAfricanelephant.Thecheetahrunsthefastestamongalllandanimals.Ithinkthemostusefulplantintheworldisbamboo.Itisperhapsthemostinterestingplantintheworld.形容词副词Readthesentencesandnoticethewordsinbold.Whatarethewaystoformasuperlativeadjectiveoradverb?3aWhichpartsofspeech(词性)havesuperlativeforms?最高级Thebluewhaleisthelargestandheaviest

animalintheworld.Thebiggest

landanimalintheworldistheAfricanelephantThecheetahruns

thefastestamongalllandanimals.Ithinkthemostusefulplantintheworldisbamboo.Itisperhapsthemostinteresting

plantintheworld.形容词形容词副词形容词形容词形容词Thebluewhaleisthelargestandheaviestanimalintheworld.ThebiggestlandanimalintheworldistheAfricanelephant.Thecheetahrunsthefastestamongalllandanimals.Ithinkthemostusefulplantintheworldisbamboo.Itisperhapsthemostinterestingplantintheworld.

Presentation音节是否是规则变化Readthesentencesandnoticethewordsinbold.Whatarethewaystoformasuperlativeadjectiveoradverb?3aDoyouknowtherules?Thebluewhaleisthelargestandheaviest

animalintheworld.Thebiggest

landanimalintheworldistheAfricanelephantThecheetahruns

thefastestamongalllandanimals.Ithinkthemostusefulplantintheworldisbamboo.Itisperhapsthemostinteresting

plantintheworld.双音节heavy最高级双音节useful的最高级单音节large最高级单音节fast最高级三音节interesting的最高级单音节big最高级不规则变化呢？构成方法原级最高级单音节词和部分双音节词一般情况下，在词尾加-esttall;shorttallest;shortest以字母e结尾的词，在词尾加-stlarge;latelargest;latest重读闭音节词尾只有一个辅音字母时，先双写该辅音字母，再在词尾加-estbig;fatbiggest;fattest以“辅音字母+y”结尾的双音节词，先把y改为i，再加-esteasy;heavyeasiest;heaviest多音节词和部分双音节词在词前加mostbeautiful;popularmostbeautiful；mostpopular规则变化形容词和副词的最高级的构成原级最高级例句good(形容词)well(副词)bestSheisthebeststudentintheclass.Heplaysthepianobestamongus.bad(形容词)badly(副词)worstThisistheworstmovieI’veeverseen.Sheperformedworstinthecompetition.many(形容词)much(副词)mostThisisthemostinterestingbookI’veread.Sheworksmostefficientlyintheteam.little(形容词/副词)leastHehastheleastexperienceinthisfield.ShespeaksEnglishtheleastfluentlyamongus.far(形容词/副词)farthest(具体距离的远近)Hethrewtheballfarthestinthecompetition.furthest(抽象意义的深远)ShehasthoughtfurthestaboutthefutureofAI.不规则变化

Presentation最高级有范围？Thebluewhaleisthelargestandheaviestanimalintheworld.ThebiggestlandanimalintheworldistheAfricanelephant.Thecheetahrunsthefastest

amongalllandanimals.Ithinkthemostusefulplantintheworldisbamboo.Itisperhapsthemostinterestingplantintheworld.Yes!Readthesentencesandnoticethewordsinbold.Whatarethewaystoformasuperlativeadjectiveoradverb?3aPayattentiontotheredwords.in+范围ThisisthebiggestcityinChina.Hewastheyoungestplayerintheteam.of+具体成员/同类事物Sheisthemosttalentedofallthestudents.Thisappleisthesweetestofthefive.表示“在……范围内”，后接大范围（如地点、组织、时间阶段等）。表示“在……中”，后接具体的人或事物（复数名词/集合名词），强调从同类中选出“最……”的个体。形容词和副词的最高级的范围among+同类群体Heistherichestmanamongthebillionaires.Whichisthesmallestamongthesebirds?outof+明确范围Shescoredthehighestmarksoutofallcandidates.Thissongismyfavoriteoutofhisnewalbum.强调“在……

群体中”，后接复数名词或代词，可与of互换，但among更侧重“在多者之间”的分布感。表示“从……中”，后接明确的复数名词或代词，常用于强调“从某一特定范围中选出”。

Thebluewhaleisthelargestandheaviestanimalintheworld.Thecheetahrunsthefastestamongalllandanimals.Bambooisoneofthemostpopularsubjects

inChinesepaintings.Readthesentencesandpayattentiontotheunderlinedwords.最高级的常用句型：主语+be动词+the+形容词最高级+in/of短语.主语+实义动词（+the）+副词最高级+in/of短语.主语+be动词+oneofthe+形容词最高级+可数名词复数+in/of短语.TheYangtzeRiveris_______________riverintheworld.(第三长河）Janealways______________________inourclass.(到校最早)LinSenis_______________________intheclassbecausehenevergetstoschoolontime.（最懒的学生之一）Edisonwas___________________________intheworld.(最伟大的发明家之一）oneofthelazieststudentsoneofthegreatestinventorsthethirdlongestarrivesatschoolearliest完成句子。PresentationYouplaytheChineseflutebetterthananyoneelseinourmusicclub.你吹中国笛子比我们音乐俱乐部里的任何人都好。(你吹的最好)Iloveplayingsportsmorethananything.我最喜欢运动。比较级表达最高级？Let’sreview!Doyourememberthesesentences?当句子中出现(more)than+比较范围（如anything,anyone,anyother...）

时，常隐含最高级含义。例如：Herunsfasterthananyoneinhisclass.ThismovieismoremovingthananyotherI’veseen.他比班上任何人都跑得快

→

他是班上跑得最快的。这部电影比我看过的任何一部都感人

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这是我看过的最感人的电影。比较级表示最高级的用法Amongallanimals,Ilovepandasthebest.Ithinktheyare__________(cute)animalsintheworld.Whichdoyouthinkis_________________(beautiful),therose,thepeony,orthelotusflower?Lookatthatbutterfly!Ithas__________________(colourful)wings.Whichanimaljumps___________(high),thelion,themonkey,orthetreefrog?Theelephantbirdswere_________(large)and_______(heavy)birdseveronearth.Somecouldstanduptothreemetrestallandweighupto860kg.

PracticeCompletethesentenceswiththesuperlativeformsofthewordsinbrackets.3bn.玫瑰；蔷薇n.牡丹；芍药n.莲花n.蝴蝶n.翅膀；翼n.蛙；青蛙接近；直到v.有……重；称重量千克；公斤Amongallanimals,Ilovepandasthebest.Ithinktheyare_________(cute)animalsintheworld.Whichdoyouthinkis________________(beautiful),therose,thepeony,orthelotusflower?Lookatthatbutterfly!Ithas__________________(colourful)wings.Whichanimaljumps___________(high),thelion,themonkey,orthetreefrog?Theelephantbirdswere_________(large)and_______(heavy)birdseveronearth.Somecouldstanduptothreemetrestallandweighupto860kg.

PracticeCheckanswersthecutestthemostbeautifulheaviestthemostcolourful(the)highestthelargestSomecouldstanduptothreemetrestallandweighupto860kg.有些象鸟站立起来可以接近3米高、重达860千克。weighv.有……重；称重量weight

n.重量；分量常见搭配weighabout+数词重约……weighover+数词超过……重weighupto+数词重达……

固定词组putonweight增加体重loseweight减重—Howmuchdoesthebabyweigh?—Itweighs4kg.LanguagepointCompletethepassagewiththesuperlativeformsofthewordsinthebox.3cancientbeautifulcommongoodpopularTheginkgotreeisoneof________________livingtreesonearth.Ginkgotreesfirstappearedover200millionyearsago.Chinesepeoplelovetheginkgo,asitisasymbolofhopeandlonglife.ManyChinesebelievethattheoldginkgotreeintheZ