+Unit+7+Section+A+Grammar+Focus-4c+ 人教版八年级英语下册

Unit7

What’sthehighestmountain

intheworld?SectionAGrammarfocusoceanthePacificOceann.

大海；海洋n.

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

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

5,464kilometers

long.Canyoutranslatethefollowingsentences?明朝的长城大约有8,850千米长。TheMingGreatWallisabout8,850kilometers

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

8,844.43meters

highandsoisverydangeroustoclimb.Grammarfocus—What’sthehighestmountainintheworld?世界上最高的山是什么？—Qomolangma.珠穆拉玛峰—HowhighisQomolangma?珠穆拉玛峰有多高？—It’s8,844.43metershigh.It’shigherthananyothermountain.它有8844.43米高，它比其他的任何的山都要高。—Whichisthedeepestsaltlakeintheworld?世界上最深的咸水湖是哪个？—TheCaspianSeaisthedeepestofallthesaltlakes.里海是最深的咸水湖。—DidyouknowthatChinaisoneoftheoldestcountriesintheworld?你知道中国是世界上最古老的国家之一吗？—Yes,Idid.It’smucholderthantheUS.是的，我知道。中国比美国要古老的许多。长度、宽度、高度、深度的表示法老虎路有200米长，而且湿度很重。TigerPathis200meterslongandhasahighhumidity.这座山大概两千米高。Themountainisabouttwothousandmetershigh.那面镜子有两米长。Themirroristwometerslong.*长度、宽度、高度、深度的表示法，有一个专门的结构：“基数词+单位词+形容词”2.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…inweightNowtrytotranslatethesentencesbelow: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.这个箱子重9公斤。Theboxis9kilos.=Theboxis9kilosinweight.那座桥有三米高。Thebridgeis3metersinheight.教室有25英尺长，20英尺宽。PractiseTheclassroomwas25feetinlengthand20feetinwidth.形容词和副词的比较级和最高级大多数形容词和副词都有三个级原级:常用结构as...as...“和..….一样”ZhangHongisastallasTom.张红和汤姆一样高。2)比较级

(用于两者之间的比较)常用结构：比较级＋than...Heistaller

thanI.他比我高。Grammar3)最高级(用于三者或三者以上的比较)，常用结构:the+最高级＋of/in...

Heisthe

tallest

ofthethree.他是这三个人中最高的。Heisthe

funniest

inhisclass.他是他们班最有趣的。

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?形容词和副词比较等级的常用结构1.“比较级+thananyother+名词+其他”表示“比其他任何一个……都……”该结构可与“the+最高级+其他”相互转换Thebagischeaperthananyotherbaginthestore.=Thebagisthecheapestinthestore.2.“比较级+and+比较级”表示“越来越……”Theearthisgettingwarmerandwarmer.地球变得越来越暖和。3.“the+比较级,the+比较级”表示“越……，就越……”Themoreyoupractice,thebetteryou’llplaythepiano.4.“the+比较级+ofthetwo”表示“两者之中更……的那一个”

Susanisthetallerofthetwogirls.5.“数词+times+比较级+than”表示“……是……的几倍”Theelephantweighstentimesmorethanthepanda.另:比较级前可用much,alittle,alot,even等修饰，表强调，如：Thegirlsangevenworsethistimethanusual.6.“oneofthe+形容词最高级+复数名词”意为“最……之一”Itisoneofbesttheatersinourtown.7.“the+序数词+最高级+单数名词+in…”表示“是……中的第几……”TheYellowRiveristhesecondlongestriverinChina.Fillintheblankswiththecorrectformsofthewordsinthebox.4abigmuchpopularlongoldhighTheAmazonRiverisoneofthe_______riversintheworld.It’salittle_____thantheYangtzeRiver.Qomolangmais8,848.43meters_____.It’soneofthemost________placesforseriousmountainclimbers.longestlongerhighpopularPractice3.Nooceanintheworldisas___asthePacificOcean.4.AlthoughJapanis_____thanCanada,itis_____smaller.bigoldermuchWritetwocomparisonsabouttwotopics.Writetruefacts.4bTwocities:SingaporeandKualaLumpur(吉隆坡)KualaLumpurisasmodernasSingapore.SingaporeisbiggerthanKualaLumpurandhasalargerpopulationthanKualaLumpur.Forexample:策略：可以比较城市的面积、人口、历史等Twoanimals:MonkeyandDogAdogisbiggerthanamonkey.Amonkeyissmallerthanadog,butitclimbsatreefasterthanadog.策略：可以比较动物的身高(身长)、体重、奔跑速度、外貌特征以及寿命等Pairwork4cWritefivequestionsusingcomparisons.Thenaskyourpartneryourquestions.Whatisthehighestbuildinginourcity?Whatisthelargestshoppingmallinourcity?Whichisthebiggestparkinourcity?Whichisthelongestroadinourcity?What’sthebiggestcityinChina?...注意：在使用比较级或最高级时要有相对明确的比较范围或参照物1.Jack是他们班最高的男生。

Jack___________boy___hisclass.2.我现在感觉比昨天好多了。

I____much______thanyesterday.3.—北京最好的季节是哪个？

—我觉得是秋天。

I.PutthefollowingsentencesintoEnglish.isthetallestinfeelbetter—Whichis

thebest

seasoninBeijing?—Ithinkit’sautumn.1.DoesChinadevelop______(fast)ofallthecountriesintheworld?2.MybrotherJimmywrites_________

_________(careful)inhisclass.3.Whichshirtdoyoulike_____(good),thewhiteoneortheblueone?4.Tomfinisheshiswork____________(quick)thanJim.1.DoesChinadevelop______(fast)ofallthecountriesintheworld?2.MybrotherJimmywrites_________

_________(careful)inhisclass.3.Whichshirtdoyoulike_____(good)