冀教 八下 英语 Unit 7《Lesson 38 The World Is a Big Place》课件

Lesson38

TheWorldIsaBigPlaceUnit7

KnowOurWorld

同学们,上一课学习的单词、短语和句型你们都掌握了吗？现在大家来检验一下,点击下面的音频开始听写吧！Allofushavestudiedgeography.Canyousaythenamesofthecontinentsandoceansintheworld?THINKABOUTIT·Howmanycontinentsarethereintheworld?Whatarethey?·Whatdoyouknowabouttheplacewhereyoulive?Howmanycontinentsandoceansdoestheworldhave?Canyoupointthemout?Theearthisaveryspecialplanet,anditfacesabigproblem.①

Intheyear2010,theworld’spopulationwasover7billionintotal.②

Itisincreasingveryquickly.③

By2025,theworldmayhaveabout8billionpeople.Andby2050,theworld’spopulationmayreach9billion.温馨提示:此符号表示“考点精讲”链接。Thereisanotherproblem.Peoplecan’tliveeverywhereontheearth.Wecan’tliveinwater,andonlyaboutonethird

ofourplanetisland.④

Butpartsofthislandareverydry.Thesedryplacesarecalleddeserts.Someareashaveveryhighmountains.Othershavealotofsnowandice.Itisnoteasytoliveinthoseplaces.Therearesevencontinents:Asia,Africa,Australia,Antarctica,Europe,NorthAmericaandSouthAmerica.Antarcticaiscoveredwithsnowandiceallyearround.⑤

Luckily,peoplecanliveontheothersixcontinents.Onthesecontinents,therearegreenforests,freshwaterandrichlands.Oceanscovertwothirdsoftheearth'ssurface.Theearthhasonlyonebigocean,butweusethesenamesforitsdifferentparts:thePacificOcean,theIndianOcean,theAtlanticOceanandtheArcticOcean.ThePacificOceanisthelargestone.Theearthisourhomenow,anditwillbeourhomeinthefuture.Itmustbetreatedwellforourchildrenandforourchildren’schildren,too!⑥1)Readthelessonandmatcheachparagraphwithitsmainidea.Paragraph1

a.Sixofthesevencontinentsaregoodforpeopletoliveon.Paragraph2b.Weshouldtreattheearthwell.Paragraph3c.Anincreasingpopulationisabigproblemfortheearth.Paragraph4d.Twothirdsoftheearthiscoveredwithoceans.Paragraph5e.Peoplecannotliveeverywhereontheearth.2)Fillintheblankswiththecorrectformsofthewordsinthebox.increasedrysurfacebilliontotal1.Thenumberofswimmershereis__________quicklybecauseit’sveryhotthesedays.2.Theschoolhasa________of900students.3.Ithinkitmaybethe________seasonoftheyear.4.The________ofourbodyisskin.Itprotectsus.5.Howmany________ofpeoplearethereintheworldnow?increasingtotal

driestsurfacebillions3)Matchthesevencontinentswiththeircorrectdescriptions.Itisthebiggestcontinent.IthasthehighestpointontheearthintheHimalayas.EuropeSouthAmerica

Asia

AfricaAustraliaAntarcticaNorthAmericaItisthesmallestcontinent.Youcanfindkoalasandkangaroosthere.Itisthesixthlargestcontinent.Itisagoodplaceforpeopletotravelto.Itisthefifthlargestcontinent.TheSouthPoleisonthiscontinent.Itisthefourthlargestcontinent.Thereare13countriesonthiscontinent.Itisthethirdlargestcontinent.Canada,MexicoandtheU.S.arethethreemajorcountriesonthiscontinent.Itisthesecondlargestcontinent.Manyelephants,giraffes,zebrasandlionslivethere.①Theearthisaveryspecialplanet,anditfacesabigproblem.planet/plænɪt/n.(alargeroundobjectinspacethatmovesaroundastar)行星e.g.Theearthistheonlyplanetthatweknowhaslifeatpresent.地球是目前我们所知的唯一有生命存在的行星。考点1planet为可数名词，指环绕恒星运转的星球。返回温馨提示：可返回原文②Intheyear2010,theworld’spopulationwasover7billionintotal.billion/bɪlɪən/n.十亿;千兆e.g.Wewanttwobillion.我们想要20亿。Therearebillionsofstarsinthesky.天上有数十亿的星星。Hundredsofpeoplewerekilledintheearthquake.地震中有数百人丧生。Thereareaboutfivehundredstudentsinthisschool.这所学校大约有500名学生。考点2与billion用法类似的词有hundred，thousand，million。billion前有数词修饰时，billion不能用复数形式。billionsof意为“数十亿的”，表示不确定的数量。中考在线1:Weallknowthat________birdsflytoDongtingLakeinwinter.[益阳]A.millionB.millionsC.millionsofC【】句意为“我们都知道在冬季数百万的鸟飞往洞庭湖”。millionsof…意为“数百万的……”。total/təʊtl/n.总计;总数adj.总的;总计的e.g.Atotaloftwentyletterswerereceivedlastmonth.上个月共收到20封信。Youcanchoosefouroutofthetotalnumber.你可以从总数中选出四个。Theproblemishowmuchthetotalpaymentis.问题是要支付的总额是多少。Intotalover1,000peopleattendedtheconference.共计一千多人参加了这个会议。考点3atotalof修饰可数名词复数时，其谓语动词用复数形式；thetotalof...后的谓语动词一般用单数形式。intotal意为“总计；合计”adj.总的；总计的，一般在句中作定语，不作表语。返回③Itisincreasingveryquickly.increase/ɪn

kriːs/

v.增加;增大e.g.Thesecasesareontheincrease.这些案件在不断增加。Hispowerincreased.他的权力加强了。考点4反义词为decrease。也可作名词。常用短语ontheincrease“正在增加；不断增长”。Thepopulationofthiscityhasincreasedby5percent.这个城市的人口增长了5%。Ourcoaloutputhasincreasedto6milliontonsthisyear.我们今年的煤产量增加到了六百万吨。辨析：increaseby与increaseto①increaseby＋倍数或百分数，表示“增加了……倍或百分之……”。②increaseto＋具体增长后的数字，表示“增加到了……”中考在线2:Developinggoodreadinghabitscan_______ourreadingspeed.[抚顺、本溪、辽阳]A.reviewB.receiveC.spreadD.increase【】本题采用词语辨析法。review评论;receive收到;spread传播;increase增加,提高。句意为“养成良好的阅读习惯可以提高我们的阅读速度”。D返回④Wecan’tliveinwater,andonlyaboutonethirdofourplanetisland.onethird三分之一【易错点】分数表达法:分子用基数词,分母用序数词。分子如果大于1,分母用复数形式。考点5提示:二分之一不能说a/onesecond,而要说a/onehalf;四分之一和四分之三常用aquarter和threequarters表示。e.g.Twothirdsofthestudentsinourclassaregirls.我们班三分之二的学生是女生。Threequartersoftheinformationistrue.四分之三的信息是真实的。当“分数＋of+名词”结构作主语时，谓语动词的单复数取决于of后面的名词。名词为可数名词复数，谓语动词用复数；名词为不可数名词，谓语动词用单数。中考在线3:—Susan,howmanywomenteachersarethereinyourschool?—Inourschool,_______oftheteachers_______womenteachers.[玉林]A.thirdfourth;areB.thirdfourth;isC.threefourths;isD.threefourths;are【】句意为“—苏珊,你们学校有多少女老师？—在我们学校,四分之三的老师是女老师”。分数表达法:分子用基数词,分母用序数词;分子大于一,分母用复数。排除A、B选项。“teachers”是复数形式,故谓语动词用are。D中考在线4:About______ofthestudentsinKaili

______toschoolbybus.[黔东南]A.twofifth;goB.twofifths;goC.twofifth;goesD.twofifths;goes【】采用主谓一致法。句意为“大约五分之二凯里的学生乘公共汽车上学”。英语中,分数的分子用基数词,分母用序数词;分子大于一时,分母用复数形式。“分数+of+名词”作主语时,谓语动词与of后的名词保持数的一致。of后“thestudents”是可数名词复数,则谓语动词用复数形式go。B返回⑤Antarcticaiscoveredwithsnowandiceallyearround.becoveredwith被……覆盖e.g.Ourgardeniscoveredwithgrassandflowers.我们的花园被花草覆盖着。Pleasecoverthisdeskwithacloth.请用一块布盖住这张课桌。考点6主动结构为：cover...with...(用……盖住……)中考在线5:Mostoftheearth’ssurface______bywater.[新疆]A.iscoveredB.coversC.isgrownD.grows【】句意为“地球表面的大部分被水”。cover覆盖;grow种植,生长。结合常识可知,地球表面大部分被水覆盖。据此排除C、D。主语“Mostoftheearth’ssurface”与谓语“cover”构成动宾关系,应用被动语态。A返回⑥Itmustbetreatedwellforourchildrenandforourchildren’schildren,too!情态动词的被动语态本句中