九年级课件Unit9 When was it invented Section A.pptVIP

* * Unit 9 When was it invented ? Section A Talk about the history of inventions. The passive voice. Language Goals: Grammar Focus: 1b Listen and match the inventions with the dates. a b e d c 1876 1885 1927 1971 1976 d a b e c 1c 1c When was the telephone invented ? I think it was invented in 1876. Julie Thompson battery-operated slippers Chelsea Lanmon heated ice cream scoop Jayce Coziar and Jamie Ellsworth shoes with adjustable heels 2a Listen and number the inventions in the order that you hear. 3 1 2 2b Who was it / were they invented by ? It was/ They were invented by Chelsea Lanmon. 3b What do you think is the most helpful invention? I think the most helpful invention is the light bulb. Why is that? Well, it gives people more time to work and play every day. The passive voice. 被动语态 英语中动词有主动语态和被动语态两种语态. 主动语 态表示主语是动作的执行者,被动语态表示主语是动作的 承受者, 在被动语态中动作的执行者有时用by短语表示 出来. 被动语态的构成: 助动词be+ (及物动词的) 过去分词 一般现在时 一般过去时 am (is, are) + done was (were) + done { The passive voice. 被动语态 被动语态的用法: 不知动作执行者时,常用被动语态. eg. My bike was stolen yesterday. This car is made in American. 2. 不必要说出动作执行者时,常用. eg. Rome was not built in a day. 3. 为了突出强调动作的承受者时,常用被动语态. eg. Thousands of beaches are polluted (污染). The passive voice. 被动语态 主动语态变为被动语态的步骤: 把原主动句中的宾语转换为被动语态的主语. 2.把动词改为被动形式,即 “be + 过去分词” . 注意 be 动词要按新的主语的人称和数进行变化,时态要和原来 的主动语态的时态保持一致. 3. 原来主动语态句中的主语,如果需要,就放在by后面 以它的宾格形式出现. 如果没有必要就可以省略.其他的 成分 (定语,状语) 不变, 句式也不能变. * * *