2024秋新冀教版英語七年級上冊課件 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.我們的星球上只有大約三分之一是陸地。onethirdof意為“三分之一的”，其構成為“基數(shù)詞（分子）+序數(shù)詞（分母）+of”。當基數(shù)詞（分子）大于1時，序數(shù)詞（分母）加-s。當分數(shù)作主語時，謂語動詞的單復數(shù)由后面所接的名詞決定。如果是不可數(shù)名詞，謂語動詞用單數(shù)形式；如果是可數(shù)名詞復數(shù)，謂語動詞用復數(shù)形式。Onethirdofthestudentsinourclassareboys.我們班三分之一的學生是男生。拓展

百分數(shù)作主語時，謂語動詞的單復數(shù)也由后面所接的名詞決定。如：Forty-fivepercentstudentsexercisefourtosixtimesaweekinourclass.我們班百分之四十五的學生每周鍛煉四到六次。1Butsomeplacesaredifficultforhumanstolivebecauseofthesnowandice,thedeserts,orthehighmountains.但有些地方由于冰雪、沙漠或高山，人類很難生活。becauseof為介詞短語，意為“因為；由于”，后面可接名詞（短語）、代詞或動名詞等。其可放在句首或句中，當放在句首時，后面用逗號隔開。Hewalkedslowlybecauseofhisbadleg.他因腿不方便而行走緩慢。辨析

because與becauseof（1）because后接句子，可回答以why開頭的問句。（2）becauseof后接名詞、代詞、v.-ing形式。2Whichcontinentisfullofsnowandiceallyearround?哪個大陸終年被冰雪覆蓋？befullof意為“裝滿；充滿”，后面通常跟名詞，主語可以是人，也可以是物，表示狀態(tài)。Sheisfullofjoyafterhearingthegoodnews.聽到這個好消息后，她非常高興。拓展befilledwith意為“用……把……裝滿”，有時可與befullof相互轉(zhuǎn)換。如：Thebottleisfilledwithmilk.=Thebottleisfullofmilk.瓶子里裝滿了牛奶。32Readthepassageagainan