Unit4TheWondersofNatureSectionAGrammarfocus课件人教版英语八年级下册

2.Whosebirthdayisit?Unit4TheWondersofNature人教版英语（八年级下册）SectionAGrammar

Focus2.Whosebirthdayisit?通过听读例句、分析结构等方式，获取并正确认读形容词和副词比较级、最高级的构成规则（规则变化、不规则变化）及核心用法相关词汇与句式（如bigger,thebiggest,moreamazing等），感知比较级与最高级的语法特征；（学习理解）01通过完成句式填空、改写句子、编写比较类问题等练习，获取比较级与最高级在描述事物特征、动作程度时的关键用法，归纳并内化“比较级+than”“oneofthe+最高级+可数名词复数”等常用表达；（应用实践）02通过讨论、问答互动等活动，理解比较级与最高级在实际交际中描述事物差异、进行对比的意义，能够主动运用该语法结构描述身边的人或事物，并认同准确运用比较句式能让表达更丰富的语言理念。

（迁移创新）03学习目标WatchthevideoLet’senjoysomenaturalwondersoftheworld.4a

Grammar(1)数的读法.将每三位数看做一个单位，自右向左依次为thousand千，million百万，billion十亿。每个单位按百、十、个位向右读。其中百位到十位之间要加入and。(2)表示确切的数量直接用基数词Twohundredpeoplewerepresentatthemeeting.Grammar(3)表示不确切的数量用hundred、thousand、million、

billion等复数再搭配介词of。Hundredsofstudentsareplayingontheplayground.数的读法与运用thousandmillion

9，365,278,689billion4a

Grammar如何询问和表达物体的长度、宽度、高度、深度等。句型：How+long(wide,high,deep,big,heavy…)+谓语+主语+其他？Howwideisthemirror?那面镜子有多宽？如何表达物体的长度、宽度、高度、深度等呢？观察并总结:It's8,844.43metershigh.______+______+___________(long,high,wide,deep…)构成的;基数词度量词长\高\宽\深主+be+物体的长、宽、高、深的表达法：基数词+度量词（meters，kilometers,squarekilometers）+形容词（long,wide,high,deep等）。当基数词大于1时，度量词用复数形式。e.g.Thebasketballplayeris2meterstall.Theriverisabout2meterswide/deep.Themountainisabout2thousandmetershigh.“基数词+度量词+形容词”

除了以上的表示方法，有时也可用“基数词+单位词+in+长宽高深度等的名词”来表示。…inlength长度…inwidth宽度…inheight高度…indepth深度若表示重量，可以用…inweight1．TheYangtzeRiverisabout6,397kilometres________.A．tall B．high C．long D．wide2．Thenewbridgeinourvillageis_________.A．666meterhigh B．666highmeters C．666longmeters D．666meterslong3．—What’sthe________ofthebuilding?—It’s236metres________.A．high;high B．height;height C．high;height D．height;high4．这张桌子有5米长。Thedeskis

.5．这块岩石长5米，宽2米。Therockis

and2meterswide.巩固练习√√√fivemeterslong5meterslongNowtrytotranslatethesentencesbelow:那个篮球运动员有两米高。那条河只有两米深/宽。这棵树有两米高。那条河长约两千米。Thebasketballplayeristwometerstall.Theriverisonlytwometersdeep/wide.Thetreeistwometerstall.Theriverisabouttwokilometerslong.5.这座山大约有两千米高。6.这个箱子大约有两米高/宽/长。Themountainisabouttwothousandmetershigh.Theboxisabouttwometershigh/wide/long.4a

Readthesentences.Circletheadjectiveswhichcomparethings.Underlinetheadverbswhichcompareactions..GrammarGrammar形容词和副词的三个比较等级原级比较级最高级两者间“一样...”两者比“更...”三者及以上比“最...”theYangtzeRiver长江

6300kmtheAmazonRiver亚马逊河6440kmtheNile尼罗河6670kmlonglongerlongestTheAmazonRiverislongerthantheYangtzeRiver.TheNileislongerthantheAmazonRiver.TheNileisthelongestofall.概念理解比较级：_____者比较。最高级：_____者或_____者以上比较。两三三Presentation1.比较级和最高级的基本概念概念：用来修饰名词的形容词或者修饰动词的副词，会因为修饰程度不同而有所“比较”，可分为原级，比较级（更......）与最高级（最......）。Presentation2.比较级和最高级的构成longlongerlongest1.一般在词尾加-er，-est。2.以不发音的e结尾加-r，-st。3.以重读闭音节结尾，双写尾字母，再加-er，-est。4.以辅音字母加y结尾的，变y为i再加-er，-est。5.多音节和部分双音节词，词前加more，most。nicenicernicestbigbiggerbiggestheavyheavierheaviestfamousmorefamousmostfamousriverscenerylakesnowmountain规则变化Presentation2.比较级和最高级的构成不规则变化原级比较级最高级good\wellbetterbestbad\badlyworseworstmany\muchmoremostlittlelessleastoldolder\elderoldest\oldestfarfarther(更远)further(进一步的)farthest\furthestPractice1.big___________________2.high____________________ 3.low____________________ 4.deep____________________ 5.easy____________________ 6.far____________________ 7.happy_________________ 8.loud____________________ 9.great____________________ 10.close____________________11.amazing_______________________________12.interesting______________________________13.well____________________ 14.little____________________写出下列单词的比较级和最高级bigger

biggest

higher

highest

lower

lowest

deeper

deepest

easier

easiest

farther

farthest

happier

happiest

louder

loudest

greater

greatest

closer

closest

moreamazing

mostamazing

moreinteresting

mostinteresting

better

best

less

least

Presentation3.比较级的用法形容词或副词的比较级+thanTheChangjiangRiverislongerthanit.长江比它长。Billrunsfasterthananyotherboyinhisclass.比尔跑得比班上其他任何男孩都快。“比较级+and+比较级(单音节词和部分双音节词)”或“moreandmore+原级(多音节词和部分双音节词)”表示“越来越……”。Summeriscoming.It'sgettinghotterandhotter.夏天就要来了。天越来越热了。“the+比较级...，the+比较级..”表示“越……,就越……”。Themoreyouread,themoreyouknow.你阅读得越多,知道的就越多。Presentation3.比较级的用法the+比较级+ofthetwo(+名词复数)

表示“两者中较……的那个”。Mikeisthetallerofthetwoboys.迈克是两个男孩中较高的那个。Which/Who...+比较级,AorB?表示“A和B哪个/谁更……？”Whichcityislarger,BeijingorShanghai?北京和上海，哪个城市更大？A+be+倍数+形容词比较级+than+B

表示“A是B的……倍……”。Ourschoolisthreetimesbiggerthanyours.我们学校是你们学校的三倍大。

常用于修饰比较级的单词或短语：a

little、a

lot、a

bit、much、even、far等1．Ourcountryisgetting________.Manyforeignerswouldliketovisitit.A．morebeautifulandmorebeautiful B．morebeautifulandbeautifulC．moreandmorebeautiful D．beautifulandbeautiful2．—Thedoctortellsmenottoeattoomuchjunkfood,butIfindithard.—Thedoctorisright.________junkfoodyoueat,________youwillbe.A．Themore;thehealthier B．Themost;thehealthiest C．Theless;thehealthier D．Theleast;thehealthiest3．—Whichis________ofthetwins,LucyorLily?—It’shardtosay.Bothofthemaregoodattheirlessons.A．thecleverer B．cleverer C．cleverest D．thecleverest4．—WhatdoyouthinkofthenovelTheThree-bodyProblem?—I’veneverread________onebefore.Itisfullofimagination（想象力）.A．thebest B．theworst C．aworse D．abetter5．Thisbookis________interesting,butthatoneis________moreinteresting.A．far;very B．far;much C．pretty;very D．pretty;much√√√√√Presentation4.最高级的用法1.主语+谓语+(the)+最高级+in\of…

“…中最…”这是所有故事中最令人惊讶的。Thisisthemostamazingstoryofall.2.主语+谓语+oneofthe+最高级+in\of…

“…中最…之一”它是我们镇上最宽的公路之一。Itisoneofthewidestroadsinourtown.3.主语+谓语+the+序数词+最高级+名词+in\of…

“…中第…的”李明是我们班第二高的男孩。LiMingisthesecondtallestboyinourclass.4.疑问词+谓语+the+最高级，A，BorC?“在ABC中，谁最…？”月亮，地球和太阳哪个最大？Whichisthebiggest,themoon,theearthorthesun？巩固练习1．Qomolangmaisthe_________mountainintheworld.A．high B．higher C．morehigher D．highest2．Londonisoneofthe________famous________intheworld.A．/;city B．most;cities C．more;cities D．most;city√√3．—Hainanisaverylargeisland.—Yes,it’sthesecond________islandinChina.A．large B．larger C．largest D．thelarger4．Whichcityhas________population,Beijing,WuhanorShanghai?A．larger B．thelargest C．more D．themost5．Ofalltheperformers,Ithinkheisthe________one.A．success B．mostsuccessfulC．moresuccessful D．successful6．—Whoruns_________?Jim,TomorSam?—Tomdoes,ofcourse.A．fast B．faster C．mostfast D．fastest7．—Tom,IhearthatBobruns________inyourclass.Isthattrue?—No.Infact,hedoesn’trunas________asJohn.A．fastest;faster B．fastest;fast C．faster;fastest D．faster;fast√√√√√（2）“比较级+than

any

other+名词单数形式”或“比较级+than

the

other+可数名词复数形式”可与“（the+）最高级+of/among/in...转换”。The

movie

is

the

most

interesting

of

all.这部电影是所有电影中最有趣的。=The

movie

is

more

interesting

than

_____

______

movie.=The

movie

is

more

interesting

than

____

______

movies.anyothertheother原级、比较级与最高级之间的转换（1）as...as结构和最高级的转换No

ocean

in

the

world

is

as

big

as

the

Pacific

Ocean.

太平洋是世界上最大的海洋。=The

Pacific

Ocean

is

____

________

ocean

in

the

world.thebiggest1．HeisnotastallasMike.(改为同义句)Mikeis

him.2．Thisisthehighestmountaininthecountry.(改为同义句)Nomountainis

thisoneinthecountry.3．Thisriverislongerthantheotherriversinthecountry.（改为同义句）Thisriveris

inthecountry.4．NobodyelseisclevererthanDanielinhisclass.(同义句改写)Danielis

studentinhisclass.5．ItisthemostbeautifulcityinChina.（改为同义句）Itis

than

inChina.巩固练习tallerthanashighasthelongestthecleverestmorebeautifulanyothercity5.原级的用法1.…as+原级+as…“和…一样”你和我一样高。Lily和Lucy跑的一样快。Youareastallasme.LilyrunsasfastasLucy.2.否定形式…notso\as+原级+as…“前者不如后者”你不如我高。Lily跑得不如Lucy快。Youarenotso\astallasme.Lilydoesn’trunso\asfastasLucy.3.倍数+as+原级+as…“…是…的几倍；表倍数关系”Youhouseisthreetimesaslargeasmine.Thissofaistwiceasbigasthatone.常用于修饰原级的单词或短语：very、too、quite、so等Presentation1．Thisroomisas________asthatone.A．bigger B．longer C．clearly D．clean2．Danielis________hisbrother.Theyareboth1.76meterstall.A．tallerthan B．astallas C．sotallas3．—Thisfilmis________thatone.—Iagree,soIlikebothofthem.A．asinterestingas B．notasinterestingasC．moreinterestingthan D．lessinterestingthan4．—Ourclassroomis______clean______yesterday.—Sorry,I’llcleanitrightaway.A．as;as B．so;as C．notso;as巩固练习√√√√1.MountKilimanjarois__________(fivethousand,eighthundredandninety-five)metreshigh.2._________(twenty-fivethousand,sevenhundredandsixty-eight)cubicmetresofwaterpoursdownIngaFallseachsecond.3.TheEastAfricanRiftValleyisabout4,000(_____________)mileslong.4.TheTaklimakanDeserthasatotalareaofabout337,000(____________________________________)squarekilometres.Writeorspelloutthenumbers.4b

5,895乞力马扎罗山25,768/ˈkjuːbɪk/adj.立方的/maɪl/n.英里因加瀑布东非大裂谷塔克拉玛干沙漠threehundredandthirty-seventhousandfourthousand4c

Completethepassagewiththecorrectformsofthewordsinthebox.large

amazing

far

close

loudMyfriendsandIvisitedVictoriaFallsinAfricalastyear.Visitingoneoftheworld’s________waterfallswasamagicalexperience.Aswewent________tothefalls,thenoiseofthewaterslowlygrew________andlouder.Then,rightbeforeoureyes,thewaterfallappeared.Itwentonforas________astheeyecouldsee.Later,wesatinaspecialpoolatthetopofthefalls.There,wefeltthewaterrushpastusandbecomeapartofthewaterfall.Itwasthescariestbutalsothe__________experienceofourtrip!largestcloserlouderfarmostamazingn.池塘......远至（某处）4d

Writesomequestionstocompareplaces.Thenaskapartneryourquestions.•Whatisthehighest...?•Whichparkisbigger,...or...?•Is...longerthan...?Youcanaskforhelp:形容词和副词的比较级与最高级较大数字的表达规则变化、不规则变化比较级和最高级的构成Summary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moreandmore+形容词/副词原级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thousandmillion

9，365,278,689billion1.Mybrotherhas____booksthanI.A.muchB.moreC.manyD.most2.Themoreyousmile,the_____youwillfeel.A.happyB.happierC.happilyD.morehappily3.Iknowyouareshorterthanyourbrothers，butyourun_________.A.morefaster B.fastestC.morefast D.fast4.MrSmiththoughttheCenturyParkwasthesecond_____inShanghai.A.largeB.largerC.largestD.verylarge5.

IthinkEnglishisas____asmaths.

A.important

B.moreimportant

C.mostimportant

D.importanter一、单项选择BBBCA1.Chinais_______(large)thananyothercountryinAsia.2.Ourcityisbecomingmoreandmore_________(beautiful).3.The_____(much)wedofortheoldpeople,the_______(happy)we’llbe.4.Mybrotheristhe______(tall)ofthetwoboysinthepicture.5.Herbedroomistwice_________(big)thanmine.6.Mrs.Smithlooksmuch__________(young)withhernewhairstyle.7.Chinaisoneof__________________(ancient)countriesintheworld.8.TheYellowRiveristhesecond________(long)riverinChina.二、用括号中所给单词的适当形式填空tallerlargerbeautifulmorehappierlongestbiggeryoungerthemostancient三、用所给词的适当形式填空。1.(2025·扬州中考)The