人教版·八年級(jí)英語(yǔ)上冊(cè)授課老師：王老師Unit4AmazingPlantsandAnimals第3課時(shí)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.陸地；土地v.降落；著陸

adj.非洲的；非洲人的n.非洲人

PresentationThebluewhaleisthelargestandheaviestanimalintheworld.ThebiggestlandanimalintheworldistheAfricanelephant.Thecheetahrunsthefastestamongalllandanimals.Ithinkthemostusefulplantintheworldisbamboo.Itisperhapsthemostinterestingplantintheworld.形容詞副詞Readthesentencesandnoticethewordsinbold.Whatarethewaystoformasuperlativeadjectiveoradverb?3aWhichpartsofspeech(詞性)havesuperlativeforms?最高級(jí)Thebluewhaleisthelargestandheaviest

animalintheworld.Thebiggest

landanimalintheworldistheAfricanelephantThecheetahruns

thefastestamongalllandanimals.Ithinkthemostusefulplantintheworldisbamboo.Itisperhapsthemostinteresting

plantintheworld.形容詞形容詞副詞形容詞形容詞形容詞Thebluewhaleisthelargestandheaviestanimalintheworld.ThebiggestlandanimalintheworldistheAfricanelephant.Thecheetahrunsthefastestamongalllandanimals.Ithinkthemostusefulplantintheworldisbamboo.Itisperhapsthemostinterestingplantintheworld.

Presentation音節(jié)是否是規(guī)則變化Readthesentencesandnoticethewordsinbold.Whatarethewaystoformasuperlativeadjectiveoradverb?3aDoyouknowtherules?Thebluewhaleisthelargestandheaviest

animalintheworld.Thebiggest

landanimalintheworldistheAfricanelephantThecheetahruns

thefastestamongalllandanimals.Ithinkthemostusefulplantintheworldisbamboo.Itisperhapsthemostinteresting

plantintheworld.雙音節(jié)heavy最高級(jí)雙音節(jié)useful的最高級(jí)單音節(jié)large最高級(jí)單音節(jié)fast最高級(jí)三音節(jié)interesting的最高級(jí)單音節(jié)big最高級(jí)不規(guī)則變化呢？構(gòu)成方法原級(jí)最高級(jí)單音節(jié)詞和部分雙音節(jié)詞一般情況下，在詞尾加-esttall;shorttallest;shortest以字母e結(jié)尾的詞，在詞尾加-stlarge;latelargest;latest重讀閉音節(jié)詞尾只有一個(gè)輔音字母時(shí)，先雙寫(xiě)該輔音字母，再在詞尾加-estbig;fatbiggest;fattest以“輔音字母+y”結(jié)尾的雙音節(jié)詞，先把y改為i，再加-esteasy;heavyeasiest;heaviest多音節(jié)詞和部分雙音節(jié)詞在詞前加mostbeautiful;popularmostbeautiful；mostpopular規(guī)則變化形容詞和副詞的最高級(jí)的構(gòu)成原級(jí)最高級(jí)例句good(形容詞)well(副詞)bestSheisthebeststudentintheclass.Heplaysthepianobestamongus.bad(形容詞)badly(副詞)worstThisistheworstmovieI’veeverseen.Sheperformedworstinthecompetition.many(形容詞)much(副詞)mostThisisthemostinterestingbookI’veread.Sheworksmostefficientlyintheteam.little(形容詞/副詞)leastHehastheleastexperienceinthisfield.ShespeaksEnglishtheleastfluentlyamongus.far(形容詞/副詞)farthest(具體距離的遠(yuǎn)近)Hethrewtheballfarthestinthecompetition.furthest(抽象意義的深遠(yuǎn))ShehasthoughtfurthestaboutthefutureofAI.不規(guī)則變化

Presentation最高級(jí)有范圍？Thebluewhaleisthelargestandheaviestanimalintheworld.ThebiggestlandanimalintheworldistheAfricanelephant.Thecheetahrunsthefastest

amongalllandanimals.Ithinkthemostusefulplantintheworldisbamboo.Itisperhapsthemostinterestingplantintheworld.Yes!Readthesentencesandnoticethewordsinbold.Whatarethewaystoformasuperlativeadjectiveoradverb?3aPayattentiontotheredwords.in+范圍ThisisthebiggestcityinChina.Hewastheyoungestplayerintheteam.of+具體成員/同類(lèi)事物Sheisthemosttalentedofallthestudents.Thisappleisthesweetestofthefive.表示“在……范圍內(nèi)”，后接大范圍（如地點(diǎn)、組織、時(shí)間階段等）。表示“在……中”，后接具體的人或事物（復(fù)數(shù)名詞/集合名詞），強(qiáng)調(diào)從同類(lèi)中選出“最……”的個(gè)體。形容詞和副詞的最高級(jí)的范圍among+同類(lèi)群體Heistherichestmanamongthebillionaires.Whichisthesmallestamongthesebirds?outof+明確范圍Shescoredthehighestmarksoutofallcandidates.Thissongismyfavoriteoutofhisnewalbum.強(qiáng)調(diào)“在……

群體中”，后接復(fù)數(shù)名詞或代詞，可與of互換，但among更側(cè)重“在多者之間”的分布感。表示“從……中”，后接明確的復(fù)數(shù)名詞或代詞，常用于強(qiáng)調(diào)“從某一特定范圍中選出”。

Thebluewhaleisthelargestandheaviestanimalintheworld.Thecheetahrunsthefastestamongalllandanimals.Bambooisoneofthemostpopularsubjects

inChinesepaintings.Readthesentencesandpayattentiontotheunderlinedwords.最高級(jí)的常用句型：主語(yǔ)+be動(dòng)詞+the+形容詞最高級(jí)+in/of短語(yǔ).主語(yǔ)+實(shí)義動(dòng)詞（+the）+副詞最高級(jí)+in/of短語(yǔ).主語(yǔ)+be動(dòng)詞+oneofthe+形容詞最高級(jí)+可數(shù)名詞復(fù)數(shù)+in/of短語(yǔ).TheYangtzeRiveris_______________riverintheworld.(第三長(zhǎng)河）Janealways______________________inourclass.(到校最早)LinSenis_______________________intheclassbecausehenevergetstoschoolontime.（最懶的學(xué)生之一）Edisonwas___________________________intheworld.(最偉大的發(fā)明家之一）oneofthelazieststudentsoneofthegreatestinventorsthethirdlongestarrivesatschoolearliest完成句子。PresentationYouplaytheChineseflutebetterthananyoneelseinourmusicclub.你吹中國(guó)笛子比我們音樂(lè)俱樂(lè)部里的任何人都好。(你吹的最好)Iloveplayingsportsmorethananything.我最喜歡運(yùn)動(dòng)。比較級(jí)表達(dá)最高級(jí)？Let’sreview!Doyourememberthesesentences?當(dāng)句子中出現(xiàn)(more)than+比較范圍（如anything,anyone,anyother...）

時(shí)，常隱含最高級(jí)含義。例如：Herunsfasterthananyoneinhisclass.ThismovieismoremovingthananyotherI’veseen.他比班上任何人都跑得快

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他是班上跑得最快的。這部電影比我看過(guò)的任何一部都感人

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這是我看過(guò)的最感人的電影。比較級(jí)表示最高級(jí)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；薔薇n.牡丹；芍藥n.蓮花n.蝴蝶n.翅膀；翼n.蛙；青蛙接近；直到v.有……重；稱重量千克；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.有些象鳥(niǎo)站立起來(lái)可以接近3米高、重達(dá)860千克。weighv.有……重；稱重量weight

n.重量；分量常見(jiàn)搭配weighabout+數(shù)詞重約……weighover+數(shù)詞超過(guò)……重weighupto+數(shù)詞重達(dá)……

固定詞組putonweight增加體重loseweight減重—Howmuchdoesthebabyweigh?—Itweighs4kg.LanguagepointCompletethepassagewiththesuperlativeformsofthewordsinthebox.3cancientbeautifulcommongoodpopularTheginkgotreeisoneof________________livingtreesonearth.Ginkgotreesfirstappearedover200millionyearsago.Chinesepeoplelovetheginkgo,asitisasymbolofhopeandlonglife.ManyChinesebelievethattheoldginkgotreeintheZ