九年级九单元SectionA2.ppt

《九年级九单元SectionA2.ppt》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、Unit9Whenwasitinvented?SectionAPeriodTwoA:Whenwas…invented?B:Itwasinventedin…A:Whowasitinventedby?B:Itwasinventedby…A:Whatisthe…usedfor?B:The…isusedfordoing…Review192719761885181876Whatisit/aretheyusedfor?It’sanannoyinginvention.BecauseitwakesmeupwhenI’msleeping.alarmclockIthin

2、kcomputeristhemosthelpfulinvention.BecauseithelpsmesearchtheinformationthatIneed.computerWhatdoyouthinkisthemosthelpfulorannoyinginvention?3aPairworkMakealistoffivehelpfulinventionsandfiveannoyinginventions.Helpfulinventions:bike,soundproofdoorandwindow,car,computer,faxmachineA

3、nnoyinginventions:air-conditioner,truck,telephone,junkfood,icecreamA:Whatisthis?B:Itisanalarmclock.A:Whatisitusedfor?B:Itisusedforwakingpeopleupinthemorning.A:Doyouthinkitisannoying?B:Sometimes,whenIwanttogoonsleep.Dialogue1:Dialogue2:A:Whatisthis?B:Itisalightbulb.A:Whatisituse

4、dfor?B:Itisusedforgivinglight.A:Doyouthinkitishelpful?B:Yes,Ithinkso.BecauseIalwaysdohomeworkandreadbooksintheeveningbyitslight.A:Whatdoyouthinkisthemosthelpfulinvention?B:Ithinkthemosthelpfulinventionisthelightbulb.A:Whyisthat?B:Well,itgivespeoplemoretimetoworkandplayeveryday.

5、3bPairworkA:Whatdoyouthinkisthemostannoyinginvention?B:Ithinkthemostannoyinginventionistheair-conditioner.A:Whyisthat?B:Well,Ifeeluncomfortableintheroomwithanair-conditioner.GroupworkWhatwouldyoudoifyouarealoneonatinyisland?Imaginethatyouarealoneonatinyisland.Choosefiveinventio

6、nsyouwouldliketohaveontheislandwithyou.Tellthegroupwhatyouchooseandwhy.A:I’dliketohavearadiobecauseIcouldlistentomusicallday.B:Yes,butthat’snotgoingtohelpyouleavetheisland.Ithinkitwouldbebettertohave…A:I’dliketohavesomematchesbecauseIcouldlightafiretokeepwarm.B:Yes,butthat’snot

7、goingtohelpyouleavetheisland.Ithinkitwouldbebettertohaveatelephone.Dialogue1:Dialogue2:A:I’dliketohaveatelescopebecauseIcouldlookfar.B:Yes,butthat’snotgoingtohelpyouleavetheisland.Ithinkitwouldbebettertohaveasignallamp.[teliskəup]信号灯[siɡnəllæmp]GrammarThepassivevoice被动语态语态是表示主语

8、与谓语的关系的。如果主语是动作的执行者，动词要用主动语态；反之，如果主语是动作的承受者，动词就要使用被动语态