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1、Unit5LookintoScienceLesson25:Let'sDoanExperiment!I.Learningaims:Masterthenewwords:experiment,jar,upside,pour,correct,scientific,method,raincoat,force,pressure,concludeII.Learningimportantanddifficultpoints:1)Icoverthetopwithapieceofcardboardandholditthere.2)1amsosureofmyth
2、eorythatBriancandotheexperimentoveryourheadand1knowyouwon'tgetwet・3)Theforceoftheairkeepsthewaterinthejar.4)Itisstrongenoughtoholdthewater.LanguagePoints:1.Icoverthetopwithapieceofcardboardandholditthere.我用纸板把上面盖住然后托住它。【用法】句式cover---with…意为"用覆盖”,类似句式becoveredwith表示"被覆盖”,这是
3、一个系表结构。【举例】①Myrinothercoveredthetablewithcloth.我妈妈用布把桌子盖住了。②Thebediscoveredwith.paper.床上盖满了纸。2.IamsosureofmytheorythatBriancandotheexperimentoveryourheadandIknowyouwon'tgetwet.我对布莱恩在你头上做实验的理论很有把握,并且你不会湿的。【用法】这句话中的句式besureof意为"对有把握”;thatBriancandotheexperimentoveryourhead是定
4、语从句,修饰前面的名词theoryo【举例】①Areyousureofthismatter?你对这件事情有把握吗?②ThisisthebookthatTborrowed,fromthelibrary.这是我从图书馆借的书。3.Itisstrongenoughtoholdthewater.它力量很大足以把水托住。【用法】句中的enoughtodo…意为“足以……做某事”,这里的enough起副词作用,用在形容词或副词后作状语。【举例】Allanisoldenoughtogotowork.艾伦到上班年龄了。Lesson26:KeeptheCan
5、dleBurningI.Learningaims:Masterthenewwords:holder,shallow,lighter,match,examine,oxygenII.Learningimportantanddifficultpoints:1)Letthecandieburnfortwoorthreeminutes・2)Whenthecandlestopsburning,ithasusedupal1theoxygenintheair.3)Howfardoesitrise?4)Becauseaboutonefifthoftheair
6、ismadeupofoxygen,thewaterrisesandfillsaboutonefifthofthejar.LanguagePoints:词汇详解1.Whenthecandlestopsburning,ithasusedupalltheoxygenintheair・当蜡烛停止燃烧时,它就用完了空气中所有的氧气了。【用法】useup意思是“用完、用光”,这是“动词+副词”短语。这类短语用名词作宾语时,名词可用在副词前,也可用在副词后;用代词作宾语时,代词则必须用在副词前。【举例】Ig.aveLiMingalotofpenciIs,
7、buthehasusedthemupalready.我给了李明很多铅笔,但他已经把它们都用完了。1.Becauseaboutonefifthoftheairismadeupofoxygen,thewaterrisesandfillsaboutonefifthofthejar.因为组成空气的成分大约五分之一是氧气,所以水会上升并且填充瓶子的大约五分之一。【用法】短语bemadeupof意为“由……组成”,后加名词或代词作介词宾语。【举例】Thisgradeismadeupoftenclasses.这个年级是由十个班组成的。【用法】句中的one
8、-fifth意思是“五分之一”,这是一个分数。分数的表达一般遵循以下规则:分子用基数词,分母用序数词;当分子大于一时,分母要用复数形式;并且其中的连字符号有时可以不要。【举例】o