Unit4TheWondersofNatureSectionAGrammarFocus课件人教版英语八年级下册(1)-2

Unit4TheWondersofNatureGrammarFocusLearningObjectives通过本课时的学习，学生能够：掌握形容词和副词的原级、比较级与最高级的核心用法，熟练运用as...as、比较级+than、the+最高级

等句型，精准完成数字的英文读写与拼写。能够梳理本单元中出现的反义词，掌握利用反义词对照的方法理解和记忆单词的策略。能够掌握“How+adj./adv.”结构，并学会使用该结构询问数量、频率、速度等。能够结合本单元主题，按照自然奇观、地貌特征、描述性形容词和副词、人类探索自然的活动等语义类别梳理单元话题词汇。能够通过语篇练习词汇，并通过大数字和形容词的比较级别了解贝加尔湖。03Whatis_______________intheworld?Itisthe____________.thebiggestdesertHowbigisit?SaharaDesertItisabou_________squarekilometresinsize.9,000,000ninemillionLeadin.ReviewWhereis__________pointintheocean?Itisinthe_______________.thedeepest__________isit?MarianaTrenchItisabout11,000______________.metresdeepHowdeepLeadin.Review

形容词与副词的比较级和最高级核心用法：比较级：用于两者之间的比较，表示“一方比另一方更……”。常与“than”连用。TheYangtzeRiverislongerthantheYellowRiverinChina.TheMarianaTrenchisdeeperthananyotherpartoftheocean.最高级：用于三者及以上的比较，表示“最……的”（常与“the”连用，后接“in/of”短语限定范围。MountQomolangmaisthehighestmountainintheworld.TheSaharaDesertisthelargestdesertintheworld.

形容词与副词的比较级和最高级的变化规则变化规则例词一般在词尾直接加-er和-esttall—taller—tallest;light—lighter—lightest以字母-e结尾的直接加-r或-stnice—nicer—nicest;fine—finer—finest以辅音字母加y结尾的词，变y为i加-er或-estheavy—heavier—heaviest;busy—busier—busiest

形容词与副词的比较级和最高级的变化规则变化规则例词以重读闭音节结尾且末尾只有一个辅音字母的形容词，双写最后一个辅音字母再加-er或-est。thin—thinner—thinnest;hot—hotter—hottest多音节词或部分双音节词的比较级和最高级在其前面加more或most。beautiful—morebeautiful—mostbeautifulLet’sreview!比较级

V.S.最高级常见句型LuXunisoneofthegreatestwritersinChina.TheYellowRiveristhesecondlongestriverinChina.最……的……之一：oneof+the+形容词最高级+可数名词复数第几最……：the+序数词+最高级+单数名词Whatis__________mountainintheworld?Itisthe__________________.thehighest__________isit?MountQomolangmaItisabout8,848_______________.metreshighHowhighDoyourememberhowtopronouncethesenumbers?Whatisthebiggestdesertintheworld?ItistheSaharaDesert.Howbigisit?Itisabout9,000,000squarekilometresinsize.Whereisthedeepestpointintheocean?ItisintheMarianaTrench.Howdeepisit?Itisabout11,000metresdeep.Somedeep-seaanimalsareblind,buttheycan“see”aswellasothers.MountQomolangmaisoneofthegreatestwondersoftheworld,anditisstillgrowingtaller.TheYangtzeRivertravelsthefarthestinChinaandisabout6,300kilometreslong.这台电脑比那台贵一倍。Thiscomputeristwiceasexpensiveasthatone.大数字读法：Let’slearn.1100090000006,300eleventhousandninemillionsixthousandthreehundred大数字读法：Let’slearn.213,458,848.86thousandtwohundredandthirteenmillionfourhundredandfifty-eightthousand

eighthundredandforty-eight

pointeightsixpointeightsix小数部分逐个读出每个数字million大数字读法第一类：直接加-er/-est（单音节&部分双音节）原级比较级最高级规则说明talltallertallest直接加-er/-estlargelargerlargest以-e结尾，加-r/-stbigbiggerbiggest重读闭音节，双写末尾辅音heavyheavierheaviest以辅音+y结尾，变y为i加-er/-estnarrownarrowernarrowest以-ow结尾，直接加根据句意，用括号内所给单词的适当形式填空。1.Fromthe1400stothe1800s,wintersinthenorthernhalfoftheearthwere______(cold)andlongerthantheyarenow.[2025年天津市]

2.Shehelpsthemtomake_______(much)moneythanbefore.

[2024年新疆]coldermore3.AItechnologyinChinahasdeveloped______thananyoneexpected.[2025年福建省]A.fast B.faster C.fastest4.MountGonggaisthe____mountaininSichuan,higherthananyotherinthisarea.[2025年成都市]A.high B.higher C.highest大数字读法：Let’slearn.从右往左，三位一截，每截都按三位数读截完加单位：billion/thousand/millionand用在百十间，小数数字逐个读第二类：前加more/most（多音节&部分双音节）原级比较级最高级音节数beautifulmorebeautifulmostbeautiful3音节carefullymorecarefullymostcarefully3音节famousmorefamousmostfamous2音节（常用more）boringmoreboringmostboring2音节（常用more）Let’sread.阿拉伯数字英语表达

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2020.35106708643007080000onehundredandfifty-threetwothousandandtwentypointthreefivetenthousand,sixhundredandseventyeighthundredandsixty-fourthousand,threehundredsevenmillion,eightythousand第三类：不规则变化原级比较级最高级记忆要点good/wellbetterbest"好"的不规则bad/badlyworseworst"坏"的不规则farfarther/furtherfarthest/furthest距离/程度两用many/muchmoremost数量比较littlelessleast少量比较oldolder/elderoldest/eldest年龄/长幼两套

易错点辨析farthervsfurther：farther：实际距离更远（ThehotelisfartherthanIthought.）further：程度更深（Weneedfurtherdiscussion.）oldervselder：older：用于比较年龄（Mybrotherisolderthanme.）elder：用于家庭成员长幼（myeldersister）用括号内所给单词的适当形式填空。1.—Ourclassdidwellintheschoolsingingcompetition. —Yes,yousang___________________(beautifully)ofall.2.WeChatisgrowingfastandithasbeen_____________(popular)thanQQinrecentyears.3.Themobilephonewith5Gcansendvideosmuch______(fast)thanwith4G.4.MyfatheralwaystellsmethatthemoreIhelpothers,the_____________(happily)Iwilllive.5.Cindy,it'stimetopractisetheviolin.The______(much)youpractise,the______(well)you'llplay.(the)mostbeautifullymorepopularfastermorehappilymorebetterhigh→______→______big→______→______happy→______→______thin→______→______early→______→______beautiful→______→______carefully→______→______important→______→______写出比较级和最高级good/well→______→______bad/badly→______→______many/much→______→______little→______→______far→______→______higher

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highestbigger

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biggesthappier

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happiestthinner

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thinnestearlier

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earliestmorebeautiful

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mostbeautifulmorecarefully

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mostcarefullymoreimportant

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mostimportantbetter

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bestworse

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worst

more

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mostless

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leastfarther/further

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farthest/furthest1.Canyouidentifyandusecomparativeandsuperlativeadjectives/adverbsinsentences?2.Canyouread,write,andspelloutlargenumbersaccurately?3.Canyoucompletepassageswithcorrectcomparative/superlativeformsofsomeadjectives/adverbsandwritequestionstocompareplaces?Youmustdo:Recitethenewwordsandphrases.Youchoosetodo:Findtwoplaces(e.g.,parks,mountains,lakes)andwriteashortparagraphcomparingthemusingcomparativeandsuperlativeformsof