九年级英语unit6SectionA第一课时.ppt

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1、人教九年级英语Unit6Whenwasitinvented?SectionA(1a-2d)Doyouknow?WhataretheFourGreatInventionsintheancientChina?Doyouknowwhenitwasinvented?Whowasitinventedby?毕升Doyouknowwhenitwasinvented?Whowasitinventedby?1aLookatthethingsbelow.Inwhatorderdoyouthinktheywereinvented?Discussth

2、emwithyourgroup.Thennumberthem【1-4】(1=first,4=last).IthinktheTVwasinventedbeforethecar.Well,IthinktheTVwasinventedafterthecar.语法重点一IthinktheTVwasinventedbeforethecar.我认为电视比汽车发明得早。这是一个主从复合句，think后面跟了一个宾语从句。因为主句是一般现在时态，从句根据句意用了一般过去时态。（1）wasinvented意为“被发明”，此结构为一般过去时的被动

3、语态。一般过去时的被动语态的结构为“was/were+及物动词的过去分词”。如：Thesetreeswereplantedlastyear.Thecarwasboughtyesterday.（2）invent做动词，意为“发明，创造”，指发明以前没有的新东西。当物做主语时，常用被动语态。invention名词，意为“发明物”；inventor名词，意为“发明家，发明者”。如：Edison,agreatinventor,inventedmanygreatinventionsduringhislife.Manyinventionh

4、avebeeninventedlastyear.1b.Listenandmatchtheinventionswiththeyears._____1876_____1885_____1927_____19761c.StudentB,coverthedates.StudentA,askStudentBwhenthethingsinthepicturein1bwereinvented.Thenchangerolesandpracticeagain.Whenwasthetelephoneinvented?Ithinkitwasinve

5、ntedin1876.2a.Listenandnumbertheinventions【1-3】intheorderyouhearthem.________shoeswithspecialheels________shoeswithlights________hotice-creamscoop,runsonelectricity2b.Listenagainandcompletethechartbelow.InventionWhatisit/aretheyusedfor?shoeswithspecialheels_________

6、thestyleoftheshoesshoeswithlightsseeing____________hotice-creamscoop___________reallycoldice-cream2c.Makeconversationsusingtheinformationin2b.Whataretheyusedfor?They’reusedfor…语法重点二Whataretheyusedfor?它们是用来做什么的？beusedforsth./doingsth.意为“被用来做某事”，表示用途或目的，后接名词或动名词，相当于be

7、usedtodosth。如：Clothesareusedforkeeping(=tokeep)warm.Woodcanbeusedforbuilding(=tobuild)houses.Thestickisusedtowriteontheblackboard.语法重点二辨析：beusedfor，beusedas与beusedby(2)beusedas被用作……,as是介词，意为“作为”，其后一般接名词，强调使用的工具或手段。如:Theboxisusedasatablebymymother.(3)beusedby被……使用,by

8、是介词，意为“被,由”，后接动作的执行者。如:Thetoolsareusedbytheworkersinthefactory.2d.Role-playtheconversation.HeyRoy,thesubjectformyschoolprojectis“Smallinve