Unit4SectionAGrammarFocus4a4d课件人教版英语八年级下册

UnitFourTheWondersofNatureSecAGrammarFocus4a-4dHowdoweconnectwithnature?LearningObjectives语言能力Identifycomparatives/superlativesinreading;read/writelargenumbers;useregularformstocomparenaturalplaces;completepassagewithcorrectforms.学习能力Summarize5formationrules;infernewwordsfromcontext;practicecomparisonQ&Awithpartners.文化品格Learnglobal&Chinesenaturalwonders;appreciatenature&buildenvironmentalawareness.思维品质Analyzenaturalfeatureswithcomparatives/superlatives;distinguish&applycomparatives(2things)&superlatives(3+things).目录CONTENTS01Warmup05Production02Leadin06Summary03Presentation07Exercise04Practice08Homework01WarmupWarmup:形容词炸弹学生挨个进行形容词接龙，若说到的词和老师事先准备的词一样，则被“炸到”Listenandfillthechat.OhohGrassgets___________Daysgets___________Sungets______________________and___________Dreamsgets___________Smilesgets___________Lovegets______________________and___________greenerwarmerbrighterBrighterbrighterbiggerwiderstrongerStrongerstronger02LeadinLet`swatch!theYangtzeRiver(6300km)theYellowRiver(5464km)theNileRiver(6670km)TheYangtzeRiverislongerthantheYellowRiver.TheNileRiverislongerthantheYangtzeRiver.TheNileRiveristhelongest.theSaharaDesert(906km²)theTaklamakanDesert(33km²)theArabianDesert(233km²)TheSaharaDesertislargerthantheTaklamakanDesert.TheArabianDesertislargerthantheSaharaDesert.TheArabianDesertisthelargest.03Presentation4a

Readthesentences.Circletheadjectiveswhichcomparethings.Underlinetheadverbswhichcompareactions..语法关卡一:

形容词/副词三个等级原级：large比较级：larger最高级：largest原级：形容词本来的样子，不比较比较级：比较两个事物，“A比B更...”最高级：三个或多个事物对比，“最...”语法关卡二：形容词/副词原级用法as...as基本结构：A+be+as+原级+as+B“A和B一样”eg:Heisastallasme.否定结构：A+be+notso/as+原级+as+B“A和B不一样”语法关卡三：形容词/副词比较级用法主语+be动词+adj.比较级+than+比较对象eg:Sheismoreoutgoingthanme.Hershoesisbiggerthanmine.主语+实义动词+adv.比较级+than+比较对象eg:Hestudiesharderthanhisclassmates.①

比较级+than语法小技巧：than前比较级，than后用宾格注意：形物代+名词作主语时，than后对象要统一。语法关卡三：形容词/副词比较级用法eg:Thehigheryouclimb,thefasteryouwillsee.②the+比较级...,the+比较级...“越...,就越...”

eg:Theweatherisgettingcolderandcolder.③

比较级+and+比较级

“越来越...”

语法关卡三：形容词/副词比较级用法eg:Tomisthetallerofthetwo.④

the+比较级+ofthetwo“两者中比较...的”

eg:Whichismoredelicious,pizzaorhamburger?Whoistaller,TomorJack?⑤

Which/Who...+比较级，AorB?“A和B哪个/谁更...”

语法关卡三：形容词/副词比较级用法⑥

比较级+thananyother+可数名词单数=比较级+thantheother+可数名词复数

“比其他任何/所有...都...”

eg:ShanghaiisbiggerthananyothercityinChina.Thisbookismorepopularthantheotherbooksinthelibrary.可修饰比较级的词：两多：___________________________两少：___________________________一甚至：___________________________一远去：___________________________温馨提示：Heismuch

moreseriousthanhissister.Sherunsalot

fasterthanme.much;alotalittle;abitevenfar两多两少一甚至，还有一个远去了①

主语+be+the+adj.最高级+in/of/among短语

“...是...中最...的”eg:TheYangtzeRiveristhelongestriverinChina.②

主语+实义动词(+the)+adv.最高级+in/of/among短语“在...中最...的”eg:Heruns(the)fasterinourclass.语法关卡四：

形容词/副词最高级用法③

主语+be+oneofthe+adj.最高级+可数名词复数

+in/of短语

“...是...中最...的之一”eg:Chinaisoneoftheoldestcountriesinthewold.④

主语+be+the+序数词+adj.最高级+可数名词单数+in/of短语

“...在...中是第几的...”eg:TheNileisthelongestriverintheworld.语法关卡四：

形容词/副词最高级用法⑤

疑问词+be+the+adj.最高级，A、BorC?

eg:Whoisthemostoutgoing,Lisa、JackorMike?⑥

疑问词+助动词+主语+动词原形

（+the）+adv.最高级，A、BorC?

eg:Whichsubjectdoyoulikebest,English、mathsorChinese?语法关卡四：

形容词/副词最高级用法使用最高级时，前一般要加the;但当最高级前有物主代词、指示代词、名词所有格等修饰时，则不加the.温馨提示：Canyouchange?smallcoldheavy以big-bigger-biggest形式进行快速抢答comfortablehighcloselargelongcreativefunnyfat语法关卡五：形容词/副词比较级与最高级变化规则①+er/est②+r/st(哑e结尾)③

变y为i+er/est(以辅+y结尾)④

双写尾字母+er/est(以重读闭音节词尾只有一个辅音字母时)③

词前＋more/most(所有多音节和部分双音节词)原级比较级最高级good（好的）;well（好地）betterbestbad（糟糕的）；badly（糟糕地）

ill（生病的）worseworstmany;much（许多的）moremostlittle（很少的）lessleastfar（远的）fartherfarthestfurther（强调程度）furthestold（老的）elder（强调长幼）eldestolderoldest不规则变化：记忆口诀：两多两好三不好；一老一远加一少04Practice4c

Completethepassagewiththecorrectformsofthewordsinthebox.large

amazing

far

close

loudMyfriendsandIvisitedVictoriaFallsinAfricalastyear.Visitingoneoftheworld’s________waterfallswasamagicalexperience.Aswewent________tothefalls,thenoiseofthewaterslowlygrew________andlouder.Then,rightbeforeoureyes,thewaterfallappeared.Itwentonforas________astheeyecouldsee.Later,wesatinaspecialpoolatthetopofthefalls.There,wefeltthewaterrushpastusandbecomeapartofthewaterfall.Itwasthescariestbutalsothe__________experienceofourtrip!largestcloserlouderfarmostamazing维多利亚瀑布Watchthevideoandcheckyouranswers.4c

1.MountKilimanjarois__________(fivethousand,eighthundredandninety-five)metreshigh.2.___________(twenty-fivethousand,sevenhundredandsixty-eight)cubicmetresofwaterpoursdownIngaFallseachsecond.3.TheEastAfricanRiftValleyisabout4,000(_____________)mileslong.4.TheTaklimakanDeserthasatotalareaofabout337,000(____________________________________)squarekilometres.Writeorspelloutthenumbers.4b

较大数字的表达与读法1,034,507,890.121,从数字的右端向左数，每三位数加一个逗号。2,从右到左第一个逗号，读作thousand；第二个逗号，读作million第三个逗号，读作billion.英语中没有万和十万的表达一万：tenthousand十万：onehundredthousandpointthousandmillionbillion3,通常在hundred后加and,若百位数为0，则在thousand后加andandandonetwo4,小数点后面的数字一个一个读长、宽、高、深、面积的表达方式010203基数词+单位词+形容词（long,wide,high,deep等）eg:Theriveris20meterswide.基数词+单位词+in+名词（length,width,height,depth,size等）eg:Theriveris20metersinwidth.拓展：作定语时，用合成词“数词-单位词单数-形容词”eg:This20-meter-longropeisn`tenoughtohelpclimbthemountain.1.MountKilimanjarois__________(fivethousand,eighthundredandninety-five)metreshigh.2.___________(twenty-fivethousand,sevenhundredandsixty-eight)cubicmetresofwaterpoursdownIngaFallseachsecond.3.TheEastAfricanRiftValleyisabout4,000(_____________)mileslong.4.TheTaklimakanDeserthasatotalareaofabout337,000(____________________________________)squarekilometres.Writeorspelloutthenumbers.4b

5,89525,768threehundredandthirty-seventhousandfourthousand乞力马扎罗山英加瀑布东非大裂谷塔克拉玛干沙漠立方米英里05Production4d

Writesomequestionstocompareplaces.Thenaskapartneryourquestions.•Whatisthehighest...?•Whichparkisbigger,...or...?...Let`swatch!Nowadays,citywalkisasuperpopularwaytoexploreacity.Today,youarecitytourguides!Youneedtodesignthebestcitywalkrouteforourclass!每队根据任务卡上提供的信息,进行问答对话练习,并设计一份CityWalk路线每组派1位推荐官上台,对本组做的北京CityWalk路线做汇报北京

CityWalk06Summary形容词和副词的比较级与最高级较大数字的表达as+原级+as原级的用法比较级的用法最高级的用法1.比较级+than2.the+比较级,the+比较级3.比较级+and+比较级4.the+比较级+ofthetwo5.Which/Who...+比较级，AorB?6.比较级+thanany/theother+名词1.(the+)最高级+in/of/among短语2.oneofthe+形容词最高级+可数名词复数+in/of短语3.“Which/Who...(+the)+最高级,A,BorC?”4.the+序数词+形容词最高级+可数名词单数+in/of短语Summary规则变化&不规则变化比较级和最高级的构成07Exercise用所给词的适当形式填空。1.TheYellowRiveristhesecond_______(long)riverinChina.2.Theglassbridgeis_______(long)thananyotheroneinChina.3.Whois______________(outgoing),TomorJerry?4.Shestudies______________(carefully)thananyotherstudentinGrade8.5.----Howareyoufeelingtoday?----Much_______(well),thankyou.6.It`soneof_________________(popular)songsthisyear.7.Themorewetalk,the_______(close)ourfriendshipwillbe.8.Thestudentsreadtheinstructionsas________(careful)astheycouldtoavoidmistakes.longestlongermoreoutgoingmorecarefullybetterthemostpopularclosercarefully单项选择1.AItechnologyinChinahasdeveloped______thananyoneexpected.A.fastB.fasterC.thefasterD.fastest2.Qipaoisoneof_____troditionalclothesinChina,lovedbypeopleathomeandabroad.A.famousB.morefamousC.mostfamousD.themostfamous3.Amongallthesubjects,Ithinkmathis____one.Ialwaysgetgoodgradesinit.A.easyB.easierC.easiestD.theeasiestBDD单项选择4.Tokeephealthy,weshouldeat_____fastfoodanddo_____exercise.A.less;moreB.fewer;moreC.more;lessD.fewer;less5.----“Foodsafety”problemisbecoming_____thesedays.----Ithinkso.Thegovementmustdosomethingtodealwithit.A.smallerandsmallerB.betterandbetterC.nicerandnicerD.worseandworseAD单项选择6.Forme,theWestLakeis_____thananyotherlakeinHangzhou.Itsclearwaterandwillowtreesmakeitwonderfulplacetovisit.A.lessattractiveB.moreattractiveC.themost