UNIT7SECTIONA（GRAMMARFOCUS4C）课件人教版八年级英语下册

SectionAGrammarFocus--4cUnit7What’sthehighestmountainintheworld?Geographicfacts地理常识thelongestriver(have)thebiggestpopulationthehighestmountainthebiggestcountrythebiggestdesertthebiggestsaltlakethebiggestoceanthebiggestcontinent1.TheNile2.TheAmazon3.YangtzeRiverRussia

Canada

China

TheSaharaTheCaspianSeaAsia

ThePacificOceanChinaIndia

America6,300kilometers

long9.6million(百万)

squarekilometers(km²)8,844meters

high1.3

billion(十亿)QomolangmaGeographicfacts地理常识thelongestriver(have)thebiggestpopulationthehighestmountainthebiggestcountrythebiggestdesertthebiggestsaltlakethebiggestoceanthebiggestcontinentAskandanswer-Whatislongestriver/thebiggestcountryintheworld?……-Whichcountryhasthebiggestpopulation?1.---世界上哪座山最高？---珠穆朗玛峰最高。

---What’sthe_______mountainintheworld?---Qomolangma.2.---珠穆朗玛峰多高？---它高8,844.43米。它比任何一座山都高。

---____________isQomolangma?It’s8,844.43meters_____.It’s_______than____________mountain.3.---世界上哪一个咸水湖最深？---在所有的咸水湖中里海最深。

---Whichisthe_________saltlakeintheworld?---TheCaspianSeaisthe________________thesaltlakes.4.---你知道中国是世界上最古老的国家之一吗?---是的。它比美国历史悠久的多。

---DidyouknowthatChinaisoneofthe_____________intheworld.---Yes,Idid.It’s__________thantheUS.highestHowhighhighhigheranyotherdeepestdeepestoftheoldestcountries

mucholderFillintheblankswiththecorrectformsofthewordsinthebox.TheAmazonRiverisoneofthe________riversintheworld.It’salittle______thantheYangtzeRiver.2.Qomolangmais8,844.43meters_____.It’soneofthemost________placesforseriousmountainclimbers.3.Nooceanintheworldisas_____asthePacific

Ocean.4.AlthoughJapanis______thanCanada,itis______smaller.longestlongerhighpopularbigoldermuchbigmuchpopularlongoldhigh4aTwocities:____________and____________________1._________________________________________2.______________________________________________________________________________________________________________Two

animals:__________and___________1._______________________________________________________2._______________________________________________________

__________________________________________________________________Writetwocomparisonsabouttwotopics.Writetruefacts.e.g.Tworivers:theYangtzeRiverandtheAmazonRiverTheYangtzeRiverisalmostaslongastheAmazonRiver.TheAmazonislongerthantheYangtze,buttheYangtzeisthelongestriverinChina.ShanghaiNewYorkShanghaiisalmostaslargeasNewYork.ShanghaiislargerthanNewYork,butNewYorkisthelargestcityintheU.S.whales

elephantsWhalesarealmostasheavyaselephants.

Whalesareheavierthanelephants,butelephantsaretheheaviestanimalsonland.4bWritefivequestionsusingcomparisons.Thenaskyourpartneryourquestions.Whatisthehighestbuildinginourcity?____________________________________________________________________________________________________________________________________________________Whatisthelongestriverinourcity?

Whatisthelargestparkinourcity?Whatisthehighestmountaininourcity?Whatisthemostpopularcinemainourcity?4c1.同级比较

①比较级+thane.g.TheweatherinBeijingiscolderthan

thatinXi’an.

Ithinkourschoolismorebeautifulthanhis.Hestudieslesshardthanhisbrother.②as+adj./adv.

+ase.g.SheisasthinasLily.HewritesascarefullyasLinda.③not+as/so+adj./adv.+ase.g.Tonydidn’trunas\sofastasCarter.比较级考点2.比较级的修饰问题e.g.TomisalittletallerthanJim.

Thisbookismuchmoreinterestingthanthatone.3.the+比较级表示两个中更…的那个e.g.Lucyisthefatterofthetwogirls.4.“a\an+比较级”

表示“又一，再一”e.g.Lilyhasadoll,butshewants

abiggerone.5.隐形比较

（没有than的情况）e.g.Whorunsfaster,LucyorLily?

You’dbettercomeearliernexttime.

Heworkedhardlastterm,butheworksevenharderthisterm6.越来越……

①比较级+and+比较级e.g.It’sgettingcolderandcolder.②moreandmore+原级e.g.Englishisbecomingmoreandmoreimportant.7.越……就越……

the+比较级+句子，the+比较级+句子e.g.Themoreyouexercise,thehealthieryouwillbe.说明：形容词的最高级前必须加the；副词的最高级前可省略the。1.范围问题e.g.Tomisthetalleststudentintheclass.

Springisthebestseasonoftheyear.

Tonyisthemosthandsome

amongtheboys.2.“最…之一”问题e.g.Beijingisoneofthebiggestcitiesintheworld.3.“the+序数词+最高级”e.g.Ithinkheisthesecondtallestboyinhisclass.最高级考点e.g.Tomisthetalleststudentintheclass.=Tomistaller

thananyotherstudentintheclass.=Tomistallerthan

theotherstudentsintheclass.=NootherstudentsaretallerthanTom.总结：anyother+名词单数

theother+名词复数比较级和最高级的转换Exercises1.Tonyistallerthananyotherstudentinhisclass.(改同义句1)Tongistallerthan_____________________intheclass.2)Tongis_______________inhisclass.2.Ihadtocallataxibecausetheboxwas_____thanI'dexpected.A.heavyB.heavierC.theheavierD.theheaviest3.It'ssummernow.Theweatherisgetting________.A.higherandhigherB.lowerandlowerC.hotterandhotterD.colderandcolder4.ZhangBichengistheownerofTheVoiceofChinaIII.Ican'tthinkofanyonewitha______voice.A.bestB.betterC.worseD.worsttheotherstudentsthetallestBCB形容词的比较等级构成方式:1.一般单音节adj的比较级多在原形上加-er,最高级加-est.

多音节adj在原形前加more,最高级加most原级比较级最高级smallsmallersmallestbeautifulmorebeautifulmostbeautifulpopularmorepopularmostpopular2.辅音字母加y结尾时,比较级去y变i再加-er,最高级去y变i再加-est.eg.friendly→friendlier

→friendliest3.以不发音的e结尾时加-r/-st.eg.fine→finer

→finest4.重读闭音节结尾的词,如末尾是一个辅音字母,双写这个辅音字母,再加-er/-est.eg.big→bigger→biggest5.不规则adj的比较级与最高级如下:原级比较级最高级good/wellbetterbestbad/badlyworseworstmany/muchmoremostoldolder/elderoldest/eldestfarfarther/furtherfarthest/furtherlittlelessleast注：older

一般比年龄，新旧；

elder指长幼关系(一般修饰名词);elderbrother/sister

farther指距离更远；

further指抽像的.IwanttostudyEnglishfurther.talltallertallestshortshortershortestoldolderoldestcalmcalmercalmestfunnyfunnierfunniesthappyhappierhappiestbusybusierbusiestheavyheavierheaviestnicenicernicest

largelargerlargestwidewiderwidestbigbiggerbiggestfatfatterfattestthinthinnerthinnestbeautifulmorebeautifulmostbeautifuloutgoingmoreoutgoingmostoutgoingexpensivemoreexpensivemostexpensivebetterbest

farlittleworseworstmoremostfartherfarthestlessleastgoodwellbadillmany

much原级比较级最高级特殊情况cheap---fine---fat---heavy---thin---new---close---easy---cheaper---cheapestfiner---finestfatter---fattestheavier---heaviestthinner---thinnestnewer---newestcloser---closesteasier---easiest1.Ourfamilyhasboughtacarsowecantravel_____thanbefore.

A.mosteasily

B.lesseasily

C.easily

D.moreeasily

2.Myfathertoldmeastorylastnight.Itis____oneI’veeverheard.A.thefunniest

B.funniest

C.funnier

D.thefunnier

3.The_____friendsyouhave,the____youwillbe.

A.more,happy

B.many,happy

C.more,happier

D.many,happier4.Whenheheardacryforhelp,heranoutas_______ashecould.A.hardly

B.quickly

C.finally

D.slowly

5.ThisplaceisnotbigenoughforLucy’sbirthdayparty.Weshouldfinda_____