Unit7SectionAGrammarFocus4c课件人教版初中英语八年级下册

Unit7What’sthehighestmountainintheworld.?SectionA(GF-4c）1.复习本单元目标句型,熟练掌握形容词和副词比较级和最高级的运用。2.能正确运用形容词副词的比较级和最高级进行事物间的比较，能用大数描述和谈论自然地理概述,培养总结归纳的能力。3.能正确运用形容词副词的比较级和最高级进行事物间的比较，能用大数描述和谈论自然地理概述,培养总结归纳的能力。Learninggoals4.通过语法结构的学习,思考如何运用语法结构帮助我们提高英语的听、说、读、写的能力。ReviewHowmuchdoyouknowaboutthescenery?QomolangmaNomountainintheworldis

____________

Qomolangma.Itis8848.86meters_____.ltis

____________

mountaininthe

world.Itis

______than

anyother

mountainintheworld.highhigherthehighestashighastheSaharaNodesertintheworldis____________theSahara.Itis9600000squarekilometers___________.ltis_____________desertintheworld.Itis______thananyotherdesertintheworld.insizelargerthelargestaslargeasHowmuchdoyouknowaboutthescenery?ReviewtheNileNoriverintheworldis_____________theNile.Itis6,671kilometers______.ltis____________riverintheworld.Itis______thananyotherriverintheworld.longlongerthelongestaslongasHowmuchdoyouknowaboutthescenery?ReviewtheCaspianSeaNosaltlakeintheworldis_____________theCaspianSea.Itis1025meters_____.ltis______________saltlakeintheworld.Itis________thananyothersaltlakeintheworld.deepdeeperthedeepestasdeepasHowmuchdoyouknowaboutthescenery?Review

Let’slearnWhat’sthehighestmountainintheworld?Qomolangma.HowhighisQomolangma?It’s8,844.43metershigh.It’shigherthananyothermountain.Whichisthedeepestsaltlakeintheworld?TheCaspianSeaisthedeepestofallthesaltlakes.DidyouknowthatChinaisoneoftheoldestcountriesintheworld?Yes,Idid.It’smucholderthantheUS.此句型用比较级表达最高级含义形容词和副词的原级,比较级,最高级原级Positiveform比较级Comparativeform最高级Superlativeform没有比较含义,“……”两者间比较,“更……”三者及三者以上比较,“最……”注意：某些形容词和副词只用原级，如：perfect，excellent，dead等。

Let’slearn形容词和副词的原级,比较级,最高级大多数形容词和副词有三个等级：_____________________。比较级表示_________，用于__________的比较，说明“前者比后者更……”。形容词、副词的最高级用于_____________的人或事物之间的比较，常用_________来说明比较的范围。形容词最高级前要加_________，副词最高级前的the_______。原级、比较级和最高级“更……”两者之间三个或三个以上of/in短语定冠词the可省略

Let’slearn形容词和副词的比较级和最高级的变化规则smart→smarter→smartesttall→taller→tallesthigh→higher→highestshort→shorter→shortestslow→slower→slowestsmall→smaller→smallest1.一般在词尾直接加-er/-est2.以字母e结尾的词(去e)加-r/-stwide→wider→widestfine→finer→finestbrave→braver→bravestlarge→larger→largestlate→later→latestcute→cuter→cutest

Let’slearn3.重读闭音节词词尾只有一个辅音字母时，先双写该辅音字母，再加-er/-est。4.以“辅音字母+y”结尾的双音节词，改“y”为“i”，再加-er/-est。thin→thinner→thinnestfat→fatter→fattestbig→bigger→biggesthot→hotter→hottestred→redder→reddestwet→wetter→wettestfunny→funnierlazy→lazierearly→earliereasy→easierhappy→happierheavy→heavier形容词和副词的比较级和最高级的变化规则

Let’slearn5.多音节词和部分双音节词,比较级前加more，最高级前加most。特殊不规则变化beautiful→more/mostbeautifulinteresting→more/mostinterestinghard-working→more/mosthard-workingpopular→more/mostpopulargood/well→better→bestbad/badly/ill→worse→worstmany/much→more→mostlittle→less→lestold→older/elder→oldest/eldestfar→farther/further→farthest/furthest形容词和副词的比较级和最高级的变化规则

Let’slearn形容词和副词的原级,比较级,最高级的用法原级Ababypandaisascuteasababyelephant.Hestudiesashardashisbrother.“as+形容词/副词原级+as”意为“和……一样”用于肯定句

Let’slearn形容词和副词的原级,比较级,最高级的用法原级Thismountainisnotas/sohighasthatone.Hecannotrunas/sofastas

Jack.“notas/so+形容词/副词原级+as”意为“和…不一样”用于否定句

Let’slearn形容词和副词的原级,比较级,最高级的用法比较级Thismountainis

muchhigherthanthatone.Mymomgotupearlierthan

methismorning.“比较级+than…”意为“比……更……一些”

Let’slearn形容词和副词的原级,比较级,最高级的用法Bajie,stopeating!

Themoreyoueat,

theheavieryouwillbe.Ijustlovethedeliciousfood.Idon'tagreewithyou!ThemoreIeat,

Thestronger

Iwillbe.The+比较级…,

The+比较级…

意为“越……，越……”比较级

Let’slearn形容词和副词的原级,比较级,最高级的用法比较级Theweatherisgetting

colderandcolder.We

shouldwearmore!Youareright,Wujing.The

taskwillbemoreand

moredifficult,too.“比较级+and+比较级”或“moreandmore+形容词/副词原级”，表示“越来越……”

Let’slearn形容词和副词的原级,比较级,最高级的用法比较级Thetaskismuchmoredifficult.Thetaskisalotmoredifficult.Thetaskisfarmoredifficult.Beoptimistic(乐观的)!Thetaskisjusta

littlemoredifficult.当表示一方超过另一方的“程度”时，可以用much,alot,alittle,abit,even,far等来修饰形容词比较级。注意：比较级不能用very,so,too等修饰。

Let’slearn形容词和副词的原级,比较级,最高级的用法比较级Mymomistallerthanmy

dad.___________________________Whoistaller,Mymomormy

dad?Thehorsewalksfasterthantheturtle._________________________Whichanimalwalksfaster?Who/Which+……+比较级,

Aor

B

?

Let’slearn形容词和副词的原级,比较级,最高级的用法最高级主+be+形容词最高级+名词+范围。主+动词或动词短语+副词最高级(the可省略)+范围。TheYangtzeRiveristhelongestriverinChina.Shejumps(the)farthestofthethree.最高级常与介词in或of短语连用表范围

Let’slearn形容词和副词的原级,比较级,最高级的用法最高级“oneofthe+形容词最高级+可数名词复数”表示“最......之一”。Pandasareoneofthemostpopularanimals

intheworld.TheYellowRiverisoneofthelongestrivers

intheworld.

Let’slearn形容词和副词的原级,比较级,最高级的用法最高级Who/Which+……+最高级,

A,BorC?doghorsecheetah[ˈtʃiːtə]—Whichanimalsruns_________,dogs,horsesor

cheetahs?(fast)thefastest—Thecheetahs.

Let’slearn形容词和副词的原级,比较级,最高级的用法最高级the+序数词

+最高级+可数名词单数+in/of短语该结构意为“……在……中是第几……的……”（从第二开始）。Russiais__________countryintheworld.(large)Canadais________________countryintheworld.(large)Chinais______________countryintheworld.(large)thelargestthesecondlargestthethirdlargest

Let’slearn形容词和副词的原级,比较级,最高级的用法比较级表达最高级Myfatheristallerthan______________

inmyfamily.Myfatheristhetallestoneinmyfamily.Myfatheristallerthan_______________inmyfamily.“比较级+thanany

other+可数名词单数”=“比较级+thantheother+可数名词复数”表示“比其他任何……都……”,表示最高级含义，可与表示最高级的句子进行转换。anyothermembertheothermembers

Let’slearnPracticeFillintheblankswiththecorrectformsofthewordsinthebox.4a1.TheAmazonRiverisoneofthe_________riversintheworld.It’salittle________thantheYangtzeRiver.2.Qomolangmais8,844.43meters_______.It’soneofthemost__________placesforseriousmountainclimbers.3.Nooceanintheworldisas________asthePacificOcean.4.AlthoughJapanis_______thanCanada,itis________smaller.bigmuchpopularlongoldhighlongestlongerhighpopularbigoldermuch

太平洋

n.大海，海洋Fillintheblankswiththecorrectformsofthewordsinthebox.4be.g.Tworivers:theYangtzeRiverandtheAmazonRiverTheYangtzeRiverisalmostaslongastheAmazonRiver.TheAmazonislongerthantheYangtze,buttheYangtzeisthelongestriverinChina.PracticeFillintheblankswiththecorrectformsofthewordsinthebox.4bTwocities:________________and_______________________________________________________________________________________________________________________________________________________________Twoanimals:________________and_______________________________________________________________________________________________________________________________________________________________SingaporeKualaLumpurKualaLumpurisasmodernasSingapore.SingaporeisbiggerthanKualaLumpurandhasalargerpopulationthanKualaLumper.RabbitSnailArabbitisbiggerthan