九年级英语 Unit 4 Inventions and Inventors学案北师大版.doc

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1、Unit4InventionsandInventors【本讲教育信息】一.教学内容：Book15Unit4(I)学会用动词的被动语态描述物体的使用方法，构成成份和功能作用。 二.教学重点： 1.动词一般现在时被动语态。 2.动词一般过去时被动语态。 3.动词一般将来时被动语态。 4.情态动词的被动语态 5.重点词汇 三.具体内容：（一）被动语态是动词的一种特殊形式，表示句子中的主语是动词的承受者，也就是动作的对象。一般说来，只有需要动作对象的及物动词才有被动语态。被动语态的用法：1）当我们不知道谁是动作的执行者时，

2、或者没有必要指出谁是动作的执行者时，e.g.PrintingwasintroducedintoEuropefromChina.Anewbridgewillbebuiltherenextyear.2）当我们关心动作的承受者但也关心动作的执行者时，用by加动作的执行者。e.g.Thetownwasdestroyedbyanearthquake.英语动词的被动语态由助动词be+及物动词的过去分词构成。时态举例：1.一般现在时：Footballisplayedallovertheworld.Englishisspokeni

3、nBritain,theUSandsomeothercountries.Roger,youarewantedonthephone.2.一般过去时：TheGreatHallofthePeoplewasbuiltin1959.Hislegwasbrokeninanaccident.TheInternationalwaswrittenin1871byEugenePotter,theFrenchworker-poet.3.一般将来时:Moreschoolswillbebuiltinmyhometown.Hewillbeta

4、kentohospitaltomorrow.4.情态动词的被动语态Themeatshouldbekeptinafridge.Ricecanbeboiledorsteamed.[Thismaterialmustbehandledcarefully.Text:Thefirstpaperwas   (make)inChinain105ADbyamancalledCaiLun.Theoldestpiecesofpaperstillexistedweremadeinabout150AD.Forover500yearsthea

5、rtofmakingpaperwas      (limit)toChina.In610,papermakingwas         (introduce)intoJapan,andtheninto-6-CentralAsiainabouttheyear750.PapermadeitsfirstappearanceinEgyptinabout800butitwasnot       (produce)thereuntiltheyear900.Kites        (know)inChinaabout3,000

6、yearsago.Theywereusedinbattlestotransportsuppliestosoldierswhowereindanger.Wheelbarrows         (invent)intheHandynasty.Theywereusedbybuilderstocarryheavysupplies.Inabattle,wheelbarrowswereusedtocarryinjuredordeadsoldiers.Gunpowder        (discover)bytheChines

7、ewhouseditformakingfireworkshundredsofyearsago.ItwasprobablyintroducedintoEuropefromtheMiddleEast.Umbrellas       (invent)bytheChinese.Theyweremadefromoiledpaperandbamboo.RedandYellowumbrellas       (use)byhigherclass,andblueumbrellaswereusedbythecommonpeople.

8、Soccer        (develop)inEnglandinthe12thcentury.Buthundredsofyearsbeforethis-around200BC-asimilargame       (play)atthebeginningoftheHandynastyinChina.Magicsquaresareaveryoldtypeo