九 Unit6 SectionB 1a-1e.ppt

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1、Whenwasitinvented?Unit6SectionB一般过去时的被动语态一、一般过去时被动语态主语(动作承受者)+was/were+过去分词(+by+动作发出者)构成,否定形式was/were后加not。如：IwastaughtbyMissZhaolastyear.Thoseletterswerewrittenbyafamouswriter.(1)主动语态的宾语变成被动语态的主语。(2)主动语态的谓语动词变为被动语态的谓语动词，即”“be+及物动词的过去分词”(be有时态、人称和数的变化)。(3)主动语态的主语变为by的宾语。主动语态变为被动语态的步骤2.Rewritetheses

2、entencesusingthepassivevoice.1.Someonestolemywatch.____________________________________2.Theyusedfiveeggstomakethisbigcake.____________________________________3.Whendidtheyinventthepersonalcomputer?____________________________________4.Theyaskedusnottoruninthehallway._______________________________

3、_____5.Someonetookthevideobacktothestore.____________________________________Mywatchwasstolenbysomeone.Fiveeggswereusedtomakethisbigcake.Whenwasthepersonalcomputerinvented?Wewereaskednottoruninthehallway.Thevideowastakenbacktothestore.Whatkindoffooddoyoulike?sour,sweetlemonicecreamsweet，coldpotatoc

4、hipscrispy,salty1asweetcrispysaltysourFillintheblankswithwordsinthebox.soursweetcrispysaltysweetsalty________________________1bWritethenameofadifferentfoodaftereachword.sour________________________crispy_______________________sweet_______________________bananacandyapplebiscuitpotatochipssaltpotatoc

5、hipsvinegarlemon1.Thepotatochipswereinventedbymistake.2.Theywereinventedin1863.3.Thecustomerthoughtthepotatoesweren’tthinenough.4.Thecustomersaidtheyweren’tsaltyenough.5.Georgewantedtomakethecustomerhappy.6.Thecustomerwashappyintheend.Listenandcircle“T”or“F”.1cTFTTTTTFFFFF1dListenagain.Completethes

6、entences.TheHistoryofPotatoChipsDoyouknowhowpotatochipswereinvented?Potatochips_____________byacookcalledGeorgeCrum.Theywereinventedin_____.GeorgeCrumcutthepotatoesreally,really______andthencookedthemforalongtimeuntiltheywere_______.Finallyheputlotsofsaltonthemsotheywere__________.wereinvented1853t

7、hincrispyreallysalty1eMakeaconversationabouttheinventionofpotatochips.Usetheinformationin1cand1d.A:Didyouknowpotatochipswereinventedbymistake?B:Wow,Ididn’tknowthat.Whoweretheyinventedby?A:Theywereinventedby