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conversation in 2d. 。 讓學(xué)生們看大屏幕的近代發(fā)明和發(fā)明者的圖片 ,并將句子改為被動語態(tài)。Unit 6 When was it invented ? Section A (1a2d) 第一課時 Step 1 Warming up ,讓學(xué)生們將圖片與發(fā)明者相連。 T:Do you know what these inventions are? S1:It’s a car. S2:It’s a telephone. S3:It’s a television. T:Do you know who these inventors are? S1:Karl Benz. S2:Alexander Bell. S3:. Let Ss match the inventions and the inventors. Step 2 Presentation 引導(dǎo)學(xué)生們學(xué)習(xí)一般過去時態(tài)的被動語態(tài)結(jié)構(gòu)。 如: T:Karl Benz invented the first car in