初中八年级英语课件Lesson8 The World is a Big Place

Unit7KnowOurWorldmountainsriversdesertsglaciers.Lesson38:TheWorldIsaBigPlace!Theearthisaveryspecialplanet.Itisbigandbeautiful.Butitfacesmanyproblems.7billionintotalOneproblemThepopulationisincreasingveryquickly.Anotherproblem?Canweliveanywhereontheearth?Peoplecan’tliveeverywhereontheearth.71%29%

Onlyonethirdofourplanetisland.Oceanscovertwothirdsoftheearth’surface.onethird三分之一twothirds三分之二分子基数词，分母序数词，分子大于一，分子加s。Forexampleonefourth四分之一twofourths四分之二Exercises1.Onefourthofthestudents________(be)fromthecountryside.2.Twofifthsofthewater___(be)clean.areisHowmanycontinentsarethereintheworld?Whatarethey?ThinkAboutItNorthAmericaSouthAmericaEuropeAfricaAsiaAustraliaAntarcticaAntarcticaiscoveredwithsnowandiceallyearroundLuckily,peoplecanliveontheothersixcontinentsthe

Arctic

Ocean

the

Pacific

Ocean

theAtlanticOcean

the

Indian

OceanWhichoceanisthelargestone?Theearthisourhome,anditwillbeourhomeinthefuture.Itmustbetreatedwellforourchildrenandforourchildren’children,too.1.Thesedryplacesarecalleddeserts.2.Antarcticaiscoveredwithsnowandiceallyearround.3.Itmustbetreatedwellforourchildrenandforourchildren’schildren,too.

bedone被动语态1.They

make

shoesinthatfactory.主语+谓语+宾语Shoes

aremade(bythem)inthatfactory.一般现在时：变为被动语态主语+am/is/are+done2.They

bought

tencomputerslastterm．Tencomputers

werebought(bythem)lastterm.一般过去时：主语+was/were+done3.They

willfinish

theworkintendays.Thework

willbefinished(bythem)intendays.一般将来时：主语+will+be+doneLet’sDoIt!Readthelessonandmatcheachparagraphwithitsmainidea.Paragraph1a.Sixofthesevencontinentsaregoodforpeopletoliveon.Paragraph2b.Weshouldtreattheearthwell.Paragraph3c.Anincreasingpopulationisabigproblemfortheearth.Paragraph4d.Twothirdsoftheearthiscoveredwithoceans.Paragraph5e.Peoplecannotliveeverywhereontheearth.pollutionsTheincreasingpopulationAsastudent,whatshouldwedo?Weshouldpickthemupandputthemintothedustbin.Weshouldturnoffthetapswhenwedon’tusethem.Let’stakeactionstogethertomakeourschoolmoreandmorebeautiful.L