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Unit7What’sthehighestmountainintheworld?SectionAPeriod31RevisionWhathaveyoulearntinthelastperiod?Let’sreviewsomethingimportant?1PresentationNowlet’sreviewthecomparativeandsuperlativetogether.!形容词和副词的比较级和最高级1.大多数形容词和副词都有三个级1)原级:常用结构as...as...“和..….一样”ZhangHongisastallasTom.张红和汤姆一样高。2)比较级(用于两者之间的比较)常用结构：比较级＋than...HeistallerthanI.他比我高。Grammar3)最高级(用于三者或三者以上的比较)，常用结构:the+最高级＋of/in...Heisthetallestofthethree.他是这三个人中最高的。Heisthefunniestinhisclass.他是他们班最有趣的。2.形容词、副词比较级和最高级的构成a)规则变化1)一般情况下，单音节或双音节的形容词（或副词）比较级＋er，最高级＋estclever－cleverer－cleverestfew－fewer－fewestsmall－smaller－smallest等2)以e结尾的词，比较级＋r，最高级＋st即可nice－nicer－nicestcute－cuter－cutestlarge－larger－largest3)以辅音字母＋y结尾的变y为i＋er或esteasy－easier－easiesthappy－happier－happiestearly,busy,heavy,dirty,lazy也如此4)以一个辅音字母结尾的重读闭音节，双写辅音字母＋er或est的词1.fat－fatter－fattest2.thin－thinner－thinnest3.hot－hotter－hottest4.red－redder－reddest5.wet－wetter－wettest6.big－bigger－biggest5)多音节和部分双音节的词需要在形容词原级前＋more构成比较级，＋themost构成最高级beautiful－morebeautiful－themostbeautifuldelicious,popular,important,interesting,expensive,creative双音节的词careful－morecareful－themostcarefuluseful－moreuseful－themostuseful少数单音节词也是这样pleased－morepleased－themostpleasedtired－moretired－themosttiredb)不规则变化：good—better—bestwell—better—bestbad－worse－worstmany,much—more—mostfar—farther—farthest(距离远)far—further—furthest(程度深)old—elder—eldest(长幼)old—older—oldest(年龄)形容词和副词比较等级的常用结构1.“比较级+thananyother+名词+其他”表示“比其他任何一个……都……”该结构可与“the+最高级+其他”相互转换Thebagischeaperthananyotherbaginthestore.=Thebagisthecheapestinthestore.2.“比较级+and+比较级”表示“越来越……”Theearthisgettingwarmerandwarmer.地球变得越来越暖和。3.“the+比较级,the+比较级”表示“越……，就越……”Themoreyoupractice,thebetteryou’llplaythepiano.4.“the+比较级+ofthetwo”表示“两者之中更……的那一个”Susanisthetallerofthetwogirls.5.“数词+times+比较级+than”表示“……是……的几倍”Theelephantweighstentimesmorethanthepanda.6.“oneofthe+形容词最高级+复数名词”意为“最……之一”Itisoneofbesttheatersinourtown.7.“the+序数词+最高级+单数名词+in…”表示“是……中的第几……”TheYellowRiveristhesecondlongestriverinChina.2PracticeFillintheblankswiththecorrectformsofthewordsinthebox.4abigmuchpopularlongoldhigh1.TheAmazonRiverisoneofthe_______riversintheworld.It’salittle_____thantheYangtzeRiver.2.Qomolangmais8,848.43meters_____.It’soneofthemost________placesforseriousmountainclimbers.longestlongerhighpopularbigmuchpopularlongoldhigh3.Nooceanintheworldisas___asthePacificOcean.4.AlthoughJapanis_____thanCanada,itis_____smaller.bigoldermuchWritetwocomparisonsabouttwotopics.Writetruefacts.4bTwocities:SingaporeandKualaLumpur(吉隆坡)1.KualaLumpurisasmodernasSingapore.2.SingaporeisbiggerthanKualaLumpurandhasalargerpopulationthanKualaLumpur.Forexample:策略：可以比较城市的面积、人口、历史等Twoanimals:MonkeyandDog1.Adogisbiggerthanamonkey.2.Amonkeyissmallerthanadog,butitclimbsatreefasterthanadog.策略：可以比较动物的身高(身长)、体重、奔跑速度、外貌特征以及寿命等Pairwork4cWritefivequestionsusingcomparisons.Thenaskyourpartneryourquestions.1.Whatisthehighestbuildinginourcity?2.Whatisthelargestshoppingmallinourcity?3.Whichisthebiggestparkinourcity?4.Whichisthelongestroadinourcity?5.What’sthebiggestcityinChina?...注意：在使用比较级或最高级时要有相对明确的比较范围或参照物3SummaryLet’slearnwhatwehavelearnttoday!Homework1.Reviewthenewwordsandexpressions.2.PreviewthenewwordsofsectionB