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1、Lesson21:BooksorComputers?Learningaim:1.Learnaboutthehistoryofthebooks.2.Knowaboutthefountainoftheprintingpress.Learningimportantpoints:1.Whyistheprintingpressimportant?2.Howdidbookschangeinformation?NewwordsPressappearmodernelectronicsellThinkAboutItHowmanybookshaveyourea
2、dthisyear?Haveyoueverreadane-book?Doyoulikethem？LanguagePoints1.Inancienttimes,therewerenobooks,andpeoplepassesontheirknowledgebytellingstories.在古代，没有书，人们通过通过讲故事传递知识。by是介词，后面可以加名词或动名词短语，意为“通过……方式（途径）”。如：IlearnEnglishbylisteningtotapes.我通过听磁带学英语。2.Ittookalongtimetowritejust
3、onebook.仅仅写一本书就要花费很长一段时间。句型Ittakessb.sometimetodosth.意为“某人花费多长时间做某事”，it是形式主语，真正的主语是动词不定式“todosth.”；take随时态改变，本句用的是一般过去时态，所以用took。如：Ittookmetwohourstocleanmyhouseyesterday.我昨天用了两个小时打扫房子。P2链接：(1)spend…on/in…意为“花费”，主语是表示人的名词或代词，spend后接表示金钱或时间的词，on后接名词，in后接V-ing形式，也可省略in。如：Isp
4、enttwentyyuanonthedictionary.我花二十元钱买的这本字典。Theyspendonehourdoingtheirhomeworkeveryday.他们每天花费一小时做作业。P1P3(2)cost意为“花费”，主语是表示物的名词或代词，常用于“sth.costsb.somemoney”。如：Thepencostmetendollars.这支钢笔花了我十美元。(3)pay…for…意为“为……付款”，人作主语，常用paysomemoneyforsth，pay的过去式和过去分词为paid。如：Mymotherpaid30d
5、ollarsforhersweater.妈妈买这件毛衣花了三十美元。ExercisesI.根据所给汉语提示，完成下列句子。1.Acomputerisauseful_______(机器).2.Therearetwo________(印刷)pressesinourschool.3.What'sthemeaningofthesecond_________(段落)inthetext?4.________(哪一条)wayshallwego?5.Iboughtabookabout_______(现代的)historyyesterday.modernma
6、chineprintingparagraphWhichII.用所给单词的适当形式填空。1.IthinktheInternetis______________(important)thantheprintingpress.2.Thenovel__________(write)byQiongYao.3.Wecanfindinformation______(quick)ontheInternet.4.Themachinecanmake__________(thousand)ofbooksaday.5.Ifyou______(forget)thet
7、elephonenumber,youcouldlookitupinthebook.forgotmoreimportantwaswrittenquicklythousandsIII.连词成句。1.hand,the,by,model,was,plane,made__________________________________.2.get,how,you,information,did,the__________________________________?3.the,answer,English,questions,in,please_
8、_________________________________.4.the,Internet,people,lets,quickly,information,search,f
