初中英语八年级下册Unit 7 What's the highest mountain in the world Section A 教学课件

Period34a-4cGrammarfocusUnit7What’sthehighestmountainintheworld?SectionAObjectivesTolearntousecomparativesand

superlativeswithadjectivesandadverbsTolearnnewwords:thePacificOcean…oceanthePacificOceann.

大海；海洋n.

太平洋WordsreviewReviewCanyoutranslatethefollowingsentences?长江大约长6,300千米。TheYangtzeRiverisabout6,300kilometers

long.ReviewCanyoutranslatethefollowingsentences?黄河长5,464千米。TheYellowRiveris

5,464kilometers

long.ReviewCanyoutranslatethefollowingsentences?明朝的长城大约有8,850千米长。TheGreatWallinMingdynastyisabout8,850kilometers

long.ReviewCanyoutranslatethefollowingsentences?珠穆朗玛峰高8,844.43米，所以攀登起来很危险。Qomolangmais

8,844.43meters

highandsoisverydangeroustoclimb.TheYangtzeRiverisabout6300kilometers

long.TheYellowRiveris

5464kilometers

long.TheGreatWallinMingdynastyisabout8,850kilometers

long.Qomolangmais

8,844.43meters

highandsoisverydangeroustoclimb.Whatcanyougetfromtheabovefoursentences?Nowlet’strytotranslatethesentencesbelow: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.GrammarFocusWhat'sthehighestmountainintheworld?Qomolangma.HowhighisQomolangma?It's8,844.43metershigh.It'shigherthananyothermountain.Whichisthedeepestsaltlakeintheworld?TheCaspianSeaisthedeepestofallthesaltlakes.DidyouknowthatChinaisoneoftheoldestcountriesintheworld?Yes,Idid.It'smucholderthantheUS.Grammarfocus—What’sthehighestmountainintheworld?—Qomolangma.—HowhighisQomolangma?—It’s8,844.43metershigh.It’shigherthananyothermountain.—Whichisthedeepestsaltlakeintheworld?—TheCaspianSeaisthedeepestofallthesaltlakes.—DidyouknowthatChinaisoneoftheoldestcountriesintheworld?—Yes,Idid.It’smucholderthantheUS.大多数形容词有三个级。1.原级:Structure:as...as...像..….一样e.g.Timisas

tallas

Tom.2.比较级(用于两者之间的比较):Structure：形容词比较级＋than...e.g.Thisboxisbigger

thanthatone.形容词和副词的比较级和最高级3.最高级(用于三者或三者以上的比较):Structure:the+形容词的最高级＋of/in...

e.g.Tomistheheaviestinourclass.

Heisthemostpopularinourschool.

规则变化

1)一般情况下，单音节或双音节的形容词/副词比较级＋er，最高级＋est。如:clever—cleverer—cleverest

few—fewer—fewest

small—smaller—smallest等。形容词、副词的比较级和最高级规则变化和不规则变化2)以e结尾的词，比较级＋r，最高级＋st

即可。如：nice—nicer—nicest

cute—cuter—cutest

large—larger—largest3)以辅音字母＋y结尾的变y为i＋er或est

如:easy—easier—easiest

happy—happier—happiest

再如：early,busy,heavy,dirty,lazy也如此。4)重读闭音节，单辅音结尾的，双写这个辅音字母＋er

或

est的词：①

fat—fatter—fattest

②thin—thinner—thinnest

③hot—hotter—hottest

④red—redder—reddest⑤wet—wetter—wettest

⑥big—bigger—biggest

5)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。如：beautiful－morebeautiful－themostbeautiful又如:delicious,popular,important,interesting,expensive,creative双音节的词如:

careful－morecareful－themostcareful

useful－moreuseful－themostuseful少数单音节词也是这样，如：pleased—morepleased—themostpleasedtired—moretired—the

mosttiredb)不规则变化：

good—better—best

well—better—best

bad—worse—worst

many/much—more—most

far—farther—farthest

(距离远)

far—further—furthest

(程度深)old—elder—eldest

(长幼)

old—older—oldest

(年龄)三者或三者以上相比，表示最高程度时，用“the+最高级”的结构表示。这种句式一般常有表示比较范围的介词短语。例如：ZhangHuaisthetallestofthethree.Heworks(the)hardestinhisclass.最高级的用法2.最高级可被序数词以及much，byfar，nearly，almost，bynomeans，notquite，notreally，nothinglike

等词语所修饰。例如：Thishatisbyfar／much／nearly／almost／notnearly／bynomeans／notquite／nothinglikethebiggest.Howmuchdidthesecondmostexpensivehatcoat?3.表示“最高程度”的形容词，如excellent，extreme，perfect等，没有最高级，也不能用比较级。4.形容词最高级修饰作表语或介词宾语的名词、代词时，被修饰的词往往省略。e.g.Heisthetallest(boy)inhisclass.5.作状语的副词最高级前可以不加定冠词。e.g.Ofalltheboyshecame(the)earliest.

比较级考点①比较级修饰问题

alittle,abit,even,still,much,alot,far等可修饰比较级。e.g.TomisalittletallerthanJim.

Thisbookismuchmoreinterestingthanthatone.中考链接②同级比较e.g.TheweatherinBeijingiscolderthanthatinXi’an.

Ourschoolisbiggerthanyours.③the+比较级e.g.Lucyisthefatterofthetwogirls.④“a/an+比较级”

表示“又一，再一”e.g.Lilyhasadoll,butshewants

abiggerone.⑤隐性比较（没有than的情况）e.g.Whorunsfaster,LucyorLily?

You’dbettercomeearliernexttime.

Heworkedhardlastterm,butheworksevenharderthisterm.⑥越来越......

比较级+and+比较级b.the+比较级+句子，the+比较级+句子e.g.It’sgettingcolder

andcolder.

Themoreyouexercise,thebetteryouare.2.最高级考点说明：形容词的最高级前必须加the；副词的最高级前省略the。①范围问题e.g.Tomisthetalleststudentintheclass.

Springisthebestseasonoftheyear.②“......之一”问题e.g.Beijingisoneofthebiggestcitiesintheworld.③“the+序数词+最高级”e.g.Ithinkheisthesecondtallestboyinhisclass.3.比较级和最高级的转换e.g.Tomisthetalleststudentintheclass.=Tomistallerthananyotherstudentintheclass.=Tomistallerthanalltheotherstudentsintheclass.=NootherstudentsaretallerthanTom.总结：①anyother+名词单数

theother+名词复数②否定+比较级=最高级

比较级+极限=最高级

同级比较①as+adj./adv.+ase.g.SheisasthinasLily.HewritesascarefullyasLinda.②not+as/so+adj./adv.+ase.g.Tonydidn’trunsofastasCarter.1.Ourfamilyhasboughtacarsowecantravel_____thanbefore.

mosteasily

B.lesseasily

C.easily

D.moreeasily

2.Myfathertoldmeastorylastnight.Itis____oneI’veeverheard.

thefunniest

B.funniest

C.funnier

D.thefunnier

学以致用DA3.The_____friendsyouhave,the____youwillbe.

A.more,happy

B.many,happy

C.more,happier

D.many,happier4.Whenheheardacryforhelp,heranoutas_______ashecould.hardly

B.quickly

C.finally

D.slowlyCB5.ThisplaceisnotbigenoughforLucy’sbirthdayparty.Weshouldfinda_____one.

big

B.small

C.bigger

D.smallerCFillintheblankswiththecorrectformsofthewordsinthebox.bigmuchpopularlongoldhigh1.TheAmazonRiverisoneofthe_______

riversintheworld.It’salittle_______ thantheYangtzeRiver.2.Qomolangmais8,844.43meters_____. It’soneofthemost________placesfor seriousmountainclimbers.longestlongerhighpopular4a3.Nooceanintheworldisas_____as thePacificOcean.4.AlthoughJapanis_______than Canada,itis_______smaller.bigoldermuch太平洋n.

大海；海洋Writetwocomparisonsabouttwotopics.Writetruefacts.Tworivers:_________________and___________________________________________________________________________________________________________________________________________________________________________________________TheYangtzeRiverisalmostaslongastheAmazonRiver.TheAmazonislongerthantheYangtze,buttheYangtzeRiveristhelongestriverinChina.theYangtzeRivertheAmazonRiver4bTwocities:___________and___________1._______________________________.2._______________________________.Twoanimals:___________and___________1._______________________________.2._______________________________.Writefivequestionsusingcomparisons.Thenaskyourpartneryourquestions.Writing1._________________________________2._________________________________3._________________________________4._________________________________5._________________________________Whatisthehighestbuildinginourcity?4cExercises1.Sheis________than________.A.busier/usB.busier/weC.morebusy/usD.morebusy/we2.Janeis________thanBetty.A.lesstallerB.lesstallestC.lesstallD.notastall3.Chinais________countryintheworld.A.thethirdlargestB.thelargestthirdC.thethirdlargeD.athirdlargestBAA4.—Whichis____seasoninBeijing?—Ithinkit’sautumn.A.goodB.betterC.bestD.thebest5.—Whichis____,thesun,themoonortheearth?—Themoonis.smallB.smallerC.smallestD.thesmallestDD6.IstudyEnglishas____asmybrother.A.hardB.harderC.hardest7.Whichis____,abicycleoracomputer?A.expensiveB.moreexpensiveC.themostexpensive8.TheYellowRiverisoneof______riversinChina.A.longB.longerC.thelongestABC

3.LinTaois__________________________intheclassbecausehenevergetstoschoolontime.（最懒的学生之一）4.Edisonwas_________________________intheworld.

(最伟大的发明家之一）oneofthelazieststudentsoneofthegreatestinventorsTheYangtzeRiveris__________________riverintheworld.(第三长河）thethirdlongest2.TheAtlanticis__________________oceanintheworld.(第二大洋）thesecondbiggest翻译句子：同义句转换

1.FlatAismoreexpensivethanFlatBFlatBis