2024秋新冀教版英语七年级上册课件 Unit 8 Lesson 6

UNIT

8KnowingtheworldUnderstandingcultures:Theearth—ouronlyhomeWarm-upLet’senjoyasong.1Readthepassageandanswerthequestions.TheearthisaspecialplanetItisourhomenow,anditwillbeourhomeinthefuture.Butpeoplecan’tliveeverywhereontheearth.Wecan’tliveinwater.Oceanscovertwothirdsoftheearth’ssurface.Theearthhasonlyonebigocean,butweusethesenamesforitsdifferentparts:thePacificOcean,theIndianOcean,theAtlanticOcean,andtheArcticOcean.Onlyaboutonethirdofourplanetisland.Therearesevencontinents:Asia,Africa,Oceania,Antarctica,Europe,NorthAmerica,andSouthAmerica.Somelandisrichwithgreenforests,freshwater,andgoodsoil.Butsomeplacesaredifficultforhumanstolivebecauseofthesnowandice,thedeserts,orthehighmountains.Theearthisouronlyhome.Wemusttreatitwellforourchildrenandforourchildren’schildren,too!1Readthepassageandanswerthequestions.ADoyouagreethatthereisonlyoneoceanontheearth?BHowmanycontinentarethereintheworld?Whatarethey?CWhichcontinentisfullofsnowandiceallyeararound?Yes,Ido.Seven.ThereareAsia,Africa,Oceania,Antarctica,Europe,NorthAmericaandSouthAmerica.Antarctica2LanguagePointsOnlyaboutonethirdofourplanetisland.我们的星球上只有大约三分之一是陆地。onethirdof意为“三分之一的”，其构成为“基数词（分子）+序数词（分母）+of”。当基数词（分子）大于1时，序数词（分母）加-s。当分数作主语时，谓语动词的单复数由后面所接的名词决定。如果是不可数名词，谓语动词用单数形式；如果是可数名词复数，谓语动词用复数形式。Onethirdofthestudentsinourclassareboys.我们班三分之一的学生是男生。拓展

百分数作主语时，谓语动词的单复数也由后面所接的名词决定。如：Forty-fivepercentstudentsexercisefourtosixtimesaweekinourclass.我们班百分之四十五的学生每周锻炼四到六次。1Butsomeplacesaredifficultforhumanstolivebecauseofthesnowandice,thedeserts,orthehighmountains.但有些地方由于冰雪、沙漠或高山，人类很难生活。becauseof为介词短语，意为“因为；由于”，后面可接名词（短语）、代词或动名词等。其可放在句首或句中，当放在句首时，后面用逗号隔开。Hewalkedslowlybecauseofhisbadleg.他因腿不方便而行走缓慢。辨析

because与becauseof（1）because后接句子，可回答以why开头的问句。（2）becauseof后接名词、代词、v.-ing形式。2Whichcontinentisfullofsnowandiceallyearround?哪个大陆终年被冰雪覆盖？befullof意为“装满；充满”，后面通常跟名词，主语可以是人，也可以是物，表示状态。Sheisfullofjoyafterhearingthegoodnews.听到这个好消息后，她非常高兴。拓展befilledwith意为“用……把……装满”，有时可与befullof相互转换。如：Thebottleisfilledwithmilk.=Thebottleisfullofmilk.瓶子里装满了牛奶。32Readthepassageagainan