Unit6SectionA1a-2c（课件）-人教版（2012）九年级英语全册

Unit6Whenwasitinvented?SectionA1a-2cTheFourGreatInventionsofAncientChinaCompassGunpowderPapermakingPrintingDoyouknowanymodern

inventions?Whowasitinventedby?Itwasinventedby

ThomasEdison.AninventorabulbWhenwasitinvented?Itwasinventedin1879.

modern

inventionsWhoweretheyinventedby?personalcomputerJohnAtanasoffCarl

BenzAlexanderBellJ.L.Bairdmodern

inventionsWhoweretheyinventedby?personalcomputerWhereweretheyinvented?Whenweretheyinvented?Whichonedoyouthinkwasinventedfirst/last?Numbertheinventions1-4,(1=first,4=last)Ithink...wasinvented

after/before...Whatistherelationshipbetweenthem?Whataretheytalkingabout?Theyaregrandmaandgranddaughter.Theyaretalkingaboutinventions.Pre-listeningdacbCheck:A:Whenwasthecarinvented?B:Itwasinventedin…1bListenandmatchtheinventionswiththeyears.DoyourememberwhetherthegrandmotherhadaTV?ListenagainTelephoneandcar.TVwasexpensiveandherfamilycouldn'taffordit.Computerwasnotinventedwhengrandmawasakid.1.Whatdidgrandma’sfamilyusetohave?2.Whydidn’tgrandma’sfamilyhaveaTVorcomputerathome?Wecouldn’taffordtobuyaTV.Underlinethestructurewith“bedone”P139-140bedesignedforusebyonlyonepersonatatimethefirstcomputerInventions

YearsInventors1879ThomasEdison1971JohnAtanasoff1885KarlBenzaa1927J.L.Baird1876AlexanderBellA:Whenwasthecarinvented?B:Ithinkitwasinventedin1885.A:Who

wasitinvented

by?B:Itwasinvented

byKarlBenz.PairworkChildrenInventionFairheelsscooprunsonelectricityhigh-heeledshoeslow-heeledshoesflat-heeledshoesSomeinterestinginventions.Carolwenttoafairaboutinterestinginventions…312Fristly,Iheard...Secondly,...Lastly,...V.+ingn.V.+ingPredictchanginginthedarkservingA:Whatis/are...usedfor?B:...is/areusedfor...[v.ing]定语从句Whyaretheytalkingabouttheseinventions?Whyaretheseinventionsspecial?A:What’s/arethis/these?

B:It’sa…Theyare…

A:Whyis/areit/theyspecial?

B:Because…

A:What

isit/aretheyusedfor?

B:It’s/Theyareusedfor…Whatisyourspecialinvention?Drawitdown,thenintroduceitto