英语人教版九年级上册：Unit_6_When_was_it_invented_课件1.ppt

When was it invented?Unit 6Which do you think is the most important invention in the world? What other can you think of? TV? telephone? radio?computer? car?Can you tell when they were invented?A: I think was invented before B: Well, I think was invented after .1aGROUPWORK Look at the things below. Number them 15 according to the order they were invented.35241A: I think was invented before B: Well, I think was invented after .A: I think was invented before B: Well, I think was invented after a1bListen and match the inventions with the dates._ 1876_ 1885_ 1927_ 1971_ 1976bacdebecd1cPAIRWORKStudent A, cover the dates and ask student B when were the things in the picture above were invented.Model A: When was the telephone invented?B: I think it was invented in 1876.A: When was the car invented?B: I think it was invented in 1930. I think it was invented after the telephone.A: When was the _ invented?B: I think it was invented in _.Pairwork (1c:P68)19761885187619271971Edison invented the light bulb.The light bulb was invented by Edison.Who Who waswas the light bulb the light bulb invented byinvented by? ?The telephone by Bell.was invented Who was the telephone inventedWho was the telephone invented by?by?Bell invented the telephone._ was invented by _.The carKarl BenzWho was the car invented by?Who was the car invented by?Karl Benz invented the car.A: What is the car used for?B: The car is used for traveling. A: What is the _ used for?B: I think it is used for _.talking with peopleA: What is the used for?B: I think it is used for _. (count)countingA: What is the used for?B: I think it is used for _.(work)workingA: What is the used for?B: I think it is used for _.(ride) ridingA: What is the _ used for?B: It is used for _.counting(count)A: What is the used for?B: It is used for _.(count)countingA: What is the used for?B: It is used for _. (watch the things far away clearly)watching the thingsfar away clearly.A: What is the _ used for?B: It is used for _ .making the food hot.(make the food hot)A: When was invented?B: It was invented inA: Who was it invented by?B: It was invented byA: What is the used for?B: The is used for doing A: What is this?B: This is a heated ice cream scoop.A: What is it used for?B: It is used for scooping really cold ice cream.A: Who was it invented by?B: It was invented by Chelsea Lanmon.Oral Practice四、主动语态变为被动语态的步骤四、主动语态变为被动语态的步骤: They speak English. 主语主语 谓语谓语 宾语宾语English is spoken by them.主语主语 谓语动词的过去分词谓语动词的过去分词 宾语宾语(1)主动语态的宾语变成被动语态的主语。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主动语态的谓语动词变为被动语态的谓语动词，即动词，即”“”“be+及物动词的过去分及物动词的过去分词词”(be有时态、人称和数的变化有时态、人称和数的变化)。(3)主动语态的主语变为主动语态的主语变为by的宾语。的宾语。主动语态变为被动语态的步骤主动语态变为被动语态的步骤1.I open the door.The door is opened by me.2.He often helps homeless people.Homeless people are often helped by him.3.I handed out some papers just now.Some papers were handed out by me just now.主动语态:主语主语是动作的执行者执行者。被动语态:主语主语是动作的承受者承受者。被动语态结构为：(主动语态)(主动语态)(主动语态)(被动语态)(被动)(被动语态)be+过去分词过去分词将下列句子变为被动语态。将下列句子变为被动语态。五、被动语态的时态表示五、被动语态的时态表示 被动语态的时态一般只通过被动语态的时态一般只通过be表现表现, 过去分词过去分词 不变。例如：不变。例如：一般现在时一般现在时: The trees are planted by the farmers.一般过去时一般过去时: The trees were planted by the farmers.现在进行时现在进行时: The trees are being planted by the farmers.一般将来时：一般将来时：The trees will be planted by the farmers.现在完成时：现在完成时：The trees have been planted by the farmers.含情态动词的被动语态：含情态动词的被动语态：The trees can (must,should) be planted by the farmers.六、被动语态的几种句型：六、被动语态的几种句型：肯定句肯定句 主语主语+be+过去分词过去分词+(by)A sweet song was sung by her on the stage.否定句否定句 主语主语+be+not+过去分词过去分词+(by)A sweet song wasnt sung by her on the stage.一般疑问句一般疑问句 Be+主语主语+过去分词过去分词+(by)Was a sweet song sung by her on the stage?特殊疑问句特殊疑问句 疑问词疑问词+be+主语主语+过去分词过去分词+(by)Where was a sweet song sung by her?1. The woman asked the policeman for help.2. The old man on TV tells a story on Sunday.3. Do they use the box as a table?4. She sent me a collection last week.5. The teacher doesnt teach us math this term.练习练习: : 请把下列主动句变为被动句请把下列主动句变为被动句6. Did Lily buy her sister a hat?7. We often hear him play the violin at home.8. The lazy boy didnt wash clothes yesterday.9. Students listen to the kind teacher carefully.10.When did your father took you to the park.Exercise 1. They produced that kind of car.2. The workers built a bridge over the river.3. Mother tells me a story every day.That kind of car was produced by them. A bridge was built by the workers over the river.I am told a story by Mother every day.I. 请把下列主动句变为被动句请把下列主动句变为被动句:1. The TV _ (invent) around 1927.2. They are used for _ (see) in the park.3. This kite _ (make) by Uncle Wang.4. Tea _ (discover) a long time ago.5. Our classroom _ (should clean) every day.was inventedseeingwas madewas discoveredshould be cleanedII. 用所给动词的适当形式填空：用所给动词的适当形式填空：7. I think it would be better to have(1) would 在此处表示在此处表示“料想或猜想、揣测料想或猜想、揣测”，后接动词原形或完成式。后接动词原形或完成式。e.g. What would she be doing there?(2)It is better to do sth “最好做最好做“，it是是形式主语，动词不定式是真正的主语。形式主语，动词不定式是真正的主语。e.g. It is better for you to walk to school.It is better to do sth=had better to do sth