2012九年级英语 unit 9When was it invented Section A精品课件 人教新目标版.ppt

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1、九年级新目标九年级新目标Unit 9When was it invented?Section AWhich do you think is the most important invention in the world?What other can you think of?TV?telephome?radio?computer?caculator?car?Do you know what are they?computerradiotelevisioncalculatortelephonecar 1a.Groupwork Look at the things below.In what

2、orders do you think they were invented?Number them 1-5524131b.Listen and match the inventions with the dates.18851976ab19711876cd1927eAccording to what you have listened,answer the questions below.1.What did the grandma have when she was young?2.Why didnt they have a television at that time?3.Does g

3、randma have personal computer now?Telephone and car.Because it was expensive.Yes,she does.1c.Pairwork When was the computer invented?I think it was invented in 1976._Shoes with adjustable heelsIts used for scooping really cold ice cream.Right.It was invented by Chelsea Lanmon._battery-operated slipp

4、ers_heated ice cream scoop2a.Listen and number the inventions in the order.3122b.Listen again and match the items in columns.InventionWho was it/were they invented byWhat is it/are they used for?shoes with adjustable heelsChelsea Lanmonscooping really cold ice creambattery-operated sneakersJayce Coz

5、iar and Jamie Ellsworthseeking in the darkheated ice cream scoopJulie Thompsonchanging the style of the shoes2c.Pairwork What is it used for?It is used for seeing in thedark.3a.Hate it or like it?alarm clockcameralight bulbherbicidemicrowave ovenrefrigeratorvedio graphying machineair conditionerplas

6、tic bagCan you think of others?3b.Pairwork A:what do you think is the most helpful invention?B:I think the most helpful invention is the computer.A:why is that?B:Because it helps me search the information that I need.4.GroupworkImagine that you are alone on a tiny island.Choose five inventions you w

7、ould like to have on the island with you.A:Id like to have a radio because I could listen to music all day.B:Yes,but thats not going to help you leave the island.I think it would be better to have a telephone.Explanation 1.Its used for scooping really cold ice cream.be used for 意为意为“被用来被用来”,强调用途或作用。

8、强调用途或作用。e.g.The duster is used for cleaning the rooms.be used as 意为意为”被当作被当作来用来用”，强调被当作，强调被当作工具或手段来用。工具或手段来用。be used by 意为意为“被被使用，强调使用者。使用，强调使用者。e.g.The big box is used as a table.The car is used by our manager.2.Shoes with adjustable heels were invented by(1)with 是介词，意为是介词，意为”“具有，持有，带有具有，持有，带有”。e.g

9、.a girl with long hair a house with a blue roof(2)adjustable意为意为“可调整的，可调节的可调整的，可调节的”。e.g.I have a pair of shoes with adjustable heels.(3)invent是动词，意为是动词，意为“发明，创造发明，创造”。e.g.Edison invented the light bulb.invention是名词，是名词，“发明，发明物发明，发明物”e.g.Edison had about 2,000 inventions during his lifetime.3.Batter

10、y-operated slippers were invented by operate用法：用法：(1)“操作操作”e.g.Can you operate the computer?(2)“起作用，见效果起作用，见效果”e.g.The sleeping pill operated at once.(3)“经营，管理经营，管理”e.g.The company operates ten factories.(4)“动手术动手术”e.g.The doctor will operate on his mother next week.4.annoying adj.讨厌的讨厌的,恼人的恼人的 (往往指

11、事往往指事物物)e.g.How annoying it is!真讨厌。真讨厌。annoyed adj.生气的生气的,恼怒的恼怒的 (往往指人往往指人)e.g.My father is annoyed with me.爸爸在生我气。爸爸在生我气。5.helpful adj.有帮助的有帮助的,有益的有益的e.g.Mr.White is a very helpful man.构词法：构词法：n+ful adje.g.use+ful useful thank+ful thankful beauty+ful beautiful care+ful careful6.Imagine that you are

12、 alone on tiny island.alone adj.意为意为“单独的单独的”,不带感情色彩。不带感情色彩。e.g.When his wife died,he lived alone.lonely adj.意为意为“孤独的孤独的,寂寞的寂寞的”e.g.He feels lonely when he is alone.lonely 指地方时表示指地方时表示“荒凉的荒凉的,偏僻的偏僻的”e.g.The old man lives in a lonely small village.7.I think it would be better to have(1)would 在此处表示在此处表

13、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是形式主语，动词不定式是真正的主语。是形式主语，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 sthGrammar focusWhen was the car invented?It was invented in 1885.Wh

14、en were electric slippers invented?They were invented last year.Who were they invented by?They were invented by Julie Thompson.What are they used for?Theyre used for seeing in the dark.The passive voice一、语态一、语态 英语中动词有主动语态和被动语态两种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主动语态表示主语是动作的执行者,被动语态表示被动语态表示 主语是动作的

15、承受者主语是动作的承受者,在被动语态中动作在被动语态中动作 的执行者的执行者 有时用有时用by短语表示出来短语表示出来.二、被动语态的构成二、被动语态的构成 助动词助动词be+及物动词的过去分词及物动词的过去分词 am(is,are)+done 一般现在时一般现在时 was(were)+done 一般过去时一般过去时三、被动语态的用法三、被动语态的用法1.不知动作执行者时不知动作执行者时,常用被动语态常用被动语态.eg.My bike was stolen yesterday.This car is made in American.2.不必要说出动作执行者时不必要说出动作执行者时,常用被动语

16、态。常用被动语态。eg.Rome was not built in a day.3.为了突出强调动作的承受者时为了突出强调动作的承受者时,常用被动语常用被动语态态.eg.Thousands of beaches are polluted.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

17、谓语动词变为被动语态的谓语动词，即动词，即”“be+及物动词的过去分词及物动词的过去分词”(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主动语态改被动语态主动语态改被动语态Bellinvented the telephonein 1876.wasby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

18、 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

19、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

20、sung by her?They produced that kind of car.The workers built a bridge over the river.Mother tells me a story every day.请把下列主动句变为被动句。请把下列主动句变为被动句。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.1.The woman asked the policema

21、n 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.HomeworkMake a list of as least five helpful inventions and five annoying inventions.Write them down on the form on the book.