初四英语Unit4 Section A(1a-2c)课件.pptVIP

Surf the Internet ,and find out more inventions. Introduce them to your classmates,using It was invented by _______. It was invented in_______. It is used for_______. * * Unit 4 When was it invented ? Section A(1a-2c) 杨寨中学 田琳 Talk about the history of inventions. The passive voice. Language Goals: Grammar Focus: What is this? When was it invented? It was invented in 1885. car What are these? When were they invented? computer TV 1976 1927 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. What are they? battery-operated slippers What are they used for? seeing in the dark Who were they invented by? Julie Thompson What are they? Shoes with adjustable heels What are they used for? Changing the style of the shoes Who were they invented by? Jayce Coziar and Jamie Ellsworth What is this? heated ice cream scoop What is it used for? scooping really cold ice cream Who was it invented by? Chelsea Lanmon 2a Listen and number the inventions in the order that you hear. 3 1 2 changing the style of the shoes Julie Thompsom heated ice cream scoop seeing in the dark Jayce Coziar and Jamie Ellsworth battery-operated slippers scooping really cold ice cream Chelsea Lanmon shoes with adjustable heels What is is/are they used for? Who was it/were they invented by? Invention Listen again. Match the inventions with their inventors and uses. 2b 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 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. The passive voice. 被动语态 主动语态变被动语态的结构图: Bell invented the telephone in 1876. The telephone was invented by Bel