Unit7SectionAGrammarB1a-1d课件人教版八年级英语下册

What’sthehighestmountainintheworld?SectionAGrammar-B(1a-1d)ObserveandlearnCONTENTS01形容词和副词的比较级、最高级用法0203倍数的表达法度量的表达1度量的表达2mtallwide50mThetreeis_____________________.Theriveris_____________________.2meterstall50meterswide1.观察并总结：8,844.43metershigh，1,025metersdeep，6,671kilometerslong，2meterstall,50meterswide

+

+

(long,high,wide,deep…)构成的2.练一练：（1）2500米深

，（2）35千米宽

.基数词量词长/高/宽/深2500metersdeep35kilometerswideNowlet’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。那条河长约两千米。Thebasketballplayeristwometerstall.Theriverisonlytwometersdeep/wide.Thetreeistwometerstall.Thatriverisabouttwokilometerslong.2形容词和副词的比较级、最高级latelater-latestearly

earlier–earliestbigbigger-biggestfluently/difficultmore～,most～重读闭音节、末尾只有一个辅音字母双写加–er或–est一般在词尾加-er或最高级加-est以e结尾的词，只需加－r或－st以辅音字母加y结尾双音节词变y为i加–er或–est部分双音节和多音节词在原级前加more或mosttalltaller-tallestcheap,cold,small,warm,young,highfine,nice,safehappy,busy,dirty,easy,lazy,prettyfat,hot,red,thin,wet,

sad

quickly,slowly,useful,careful,popular,modern,形容词和副词比较级和最高级构成

(规则变化)不规则变化

good/well–better-best

much/many–more-mostbad/badly/ill–worse–worstlittle–less–leastfar–farther/further–farthest–furthest

old–older/elder–oldest/eldest形容词和副词原级的用法肯定句：A…+as+原级+as+B否定句：A…+notso/as+原级+as+B1.她和我一样聪明。2.Tom和Jim跑得一样快。3.这本书没有那本书有趣。Sheisassmartasme.TomrunsasfastasJim.Thisbookisn’tas/sointerestingasthatone.形容词和副词的比较级用法A…+比较级+than+BTina比我高。2.Which/Who…+比较级，AorB?

谁比较高，Tom还是Jim?3.比较级+比较级“越来越...”天气变得越来越热。4.the+比较级；the+比较级“越...就越...”你越努力，你的成绩就越好。Tinaistallerthanme.Whoistaller，TomorJim?Theweatherisgettinghotterandhotter.Theharderyouwork,thebettergradesyouwillget.比较级前常用的修饰语有

far，even，alot，abit，much等。Which/Who…+最高级,A,BorC?Tom,Mike,orJack,谁最高？2.最高级+of/in短语表比较范围

Tom是我们班跑的最快的。4.oneof+最高级+名词复数，表示“最…之一”3.最高级前面加序数词，表示“第几最…”形容词和副词的最高级的用法黄河是中国第二长河。Tina是最受欢迎的学生之一Tomrunsthefastestinourclass.TheYellowRiveristhesecondlongestriverinChina.Tinaisoneofthemostpopularstudents.5.最高级前面可以用物主代词、指示代词、名词所有格修饰。此时不能加“the”。这是我们最好的一节课。6.比较级可以表示最高级含义。LiLei是他们班上最高的学生。LiLeiisthetalleststudentinhisclass.==Thisisourbestclass.LiLeiistallerthananyotherstudentinhisclass.LiLeiistallerthantheotherstudentsinhisclass..Fillintheblankswiththecorrectformsofthewordsinthebox.bigmuchpopularlongoldhighTheAmazonRiverisoneofthe_______riversintheworld.It’salittle_______ thantheYangtzeRiver.2.Qomolangmais8,844.43meters_____. It’soneofthemost________placesforseriousmountainclimbers.longestlongerhighpopular4aoneofthe+adj.最高级+n.复数（最……的之一）3.Nooceanintheworldisas_____as thePacificOcean.4.AlthoughJapanis_______than Canada,itis_______smaller.bigoldermuchas+adj原级

+as（和……一样）much+

adj.比较级（……的多）3倍数的表达法eats150kilosoffoodadayeat10kilosoffoodaday大象吃的是熊猫吃的15倍。大象吃的比熊猫吃的多14倍。Theelephanteats______________________thepanda.Theelephanteats______________________thepanda.15timesasmuchas14timesmorethan倍数+形容词/副词比较级+than…倍数+as+形容词/副词原级+as…Tom跑得比Amy快(三倍)。1)TomrunsthreetimesfasterthanAmy.2)TomrunsfourtimesasfastasAmy.A:Thiselephantis200cmtallerthan

thispanda.B:Thispandais200cmshorterthan

thiselephant.pairwork(200cmtaller/shorter,weighmuchmore/less,eatmuchmore/lesseatmanytimesmore)A:Thiselephant

weighsmanytimesmorethan

thispanda.B:Thispanda…Comparefactsaboutthesetwoanimals.Usethelanguageintheboxtohelpyoumakesentences.Let’sknowmoreaboutpandas.Listenandcheck(√)thenumbersyouhear.Listening1001620501200.10.2150√√√√√1bListenagainandcompletethesentences.1.Atbirth,ababypandaisabout___to___kilos.

2.Atbirth,ababypandaisabout___

cmlong.

3.Ababypandaisnotblack.Itis____andithasno_____.4.Apandacanliveupto___to___years.0.10.215pinkteeth20301cPractice

1.Mybrotherhas____booksthanI.A.muchB.moreC.manyD.most2.Themoreyousmile,the_____youwillfeel.A.happyB.happierC.happilyD.morehappily3.Sheis___carefulasI,butI’m____thanyou.A.as…muchcarefulB.so…morecarefulC.as…muchmorecarefulD.so…verycareful4.MrSmiththoughttheCenturyParkwasthesecond_____inShanghai.A.largeB.largerC.largestD.verylarge5.

Wecanjump___onthemoonthanontheearth.

A.morehigh

B.much

C.high

D.muchhigher

6.

The___heis,the