高中英语-unit-4-earthquakes(第4课时)教案-新人教版必修1.doc

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1、Unit4Earthquakes教学目标：词汇：contractexpandliquidsolid短语：getawayfrom语法：分数表达法重难点攻破：1. Putthewordsinpairsorgroups:airgasoxygencontractexpandearthsunmoongasliquidsolid2.Putwordsintherightplace.electricityironmetalsteelairglassnatural:man-made:both:3.Two-thirdsoftheearthssurfaceiswater.海洋占地球表面的三分之二(1).分数表达法英

2、语中表示分数时，用基数词作分子，序数词作分母，当分子大年夜于一时，分母要用双数方法。分子跟分母之间可以用连字符连接，也可不用。比如：1/3onethird(或one-third);3/5threefifths(three-fifths)(2)当某物的几多分之几多作主语时，假设此物体本身为可数名词双数，那么谓语动词用双数方法，假设为可数名词双数或弗成数名词，谓语动词那么用双数方法。比如：Onethirdofthestudentsdontknowtheanswertothequestion.Onethirdofoneslifeisspentonthebed.人生的三分之一是在床上度过的。Three

3、fourths/Threequartersofthewatermelonhasbeeneatenupbyhim四分之三的西瓜都被他吃光了。即那个西瓜的四分之三拓展：用法类似的词语尚有half,quarter,most,percent,rest等。翻译训练：(1).我们黉舍1/4的老师英语学得不可。(2).地球上96.5%的水是海洋水。(3).Saythenumber:12,345,678,900billionmillionthousand(4).Saythepercentages:%:percent4.getawayfrom从某地等走开，离开，摆脱丢掉Shestruggledtogetaway

4、fromherattacker.她挣扎著想摆脱那个侵犯她的人.ImafraidIcantgetawayfromthemeeting.我估量难以从聚会中抽身。模典范题：Thelittleboyhas_manybadhabitsaftergoingtoschool.A.gotawayfromB.brokeawayC.keptawayfromD.stayedawayfrom强化训练：(一)单词填空：1. Weuse_电toprovidepowerformachines.2. Ifyou_加热wateritwillboil.3. Whenyouheatmetalit_.4. Ifyou_waterit

5、becomessteam.二Choosethecorrectanswertocompleteeachsentence：1.Infigures,amillionis().A.100,000B.1,000,000 C.100,000,0002.Anotherwayofsaying50percentis().A.aquarterB.halfC.ahalf3.Four-fifthsisthesameas().A.40percentB.50percentC.80percent4.Athirdofsomethingisequalto().A.two-fifthsB.33percentC.five-tenths5.Hismotherhadthoughtitwouldbegoodforhischaracterto_fromhomeandearnsomeonhisown.A.runawayB.takeawayC.keepawayD.getaway(三)预习：ReadingandVocabulary(四)作业：课本Page42Activity2，4