UNIT4 When was it invented.ppt

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1、To learn to understand and use passive voice To listen and speak about the history of inventions using passive voiceTo listen and speak about what inventions were used for using passive voiceTo listen and speak about helpful inventions and annoying inventionsTo learn new words:light bulb,microwave o

2、venReviewReviewWords and expressionsRead the words and expressions loudly.inventcalculator be used for scoop adjustable v.发明；创造发明；创造n.计算器计算器用来做用来做v.用勺舀用勺舀 n.勺子；球形勺；长柄勺勺子；球形勺；长柄勺adj.可调整的可调整的Words and expressionsheel battery operate battery-operate slipperheatn.（鞋、袜等的）后（鞋、袜等的）后跟；跟；(足足)跟跟n.电池电池v.操作；作业操

3、作；作业电池供电的电池供电的n.拖鞋拖鞋v.加热；使变热加热；使变热Words and expressionsWords and expressions bulb light bulb microwave microwave ovenn.电灯泡；电灯电灯泡；电灯电灯泡电灯泡n.微波微波微波炉微波炉carWhats this called in English?television telephone computercalculatormicrowave ovenlight bulbbatteryLook at the things.In what order do you think the

4、y were invented?A:I think the calculator was invented before the computer.B:Well,I think the calculator was invented after the computer.13425the right order they were invented Listen and match the inventions with the dates.1b_ 1876_ 1885_ 1927_ 1971_ 1976daecbEdison invented the light bulb.The light

5、 bulb was invented by Edison.Who was the light bulb invented by?What are they used for?They are used for giving light.light bulbslight bulbsbe used for 被用做于被用做于InventionsWhen was it invented?Who was it invented byWhat is it used for?1946two AmericansGetting information from the world1876Belltalking

6、with people1879EdisonGiving us lightAsk and answer in puterlight bulbtelephone3122a Listen and number the inventions in the order that you hear them.InventionWho was it/were they invented byWhat is it/are they used for?shoes with adjustable heelsChelsea Lanmonscooping really cold ice creambattery-op

7、erated sneakersJayce Coziar and Jamie Ellsworthseeing in the darkheated ice cream scoopJulie Thompsonchanging the style of the shoes Listen again and match the items with their inventors and uses.2bOral Practice Sentence pattern:When was it invented?Who was it/were they invented by?It was/They were

8、invented by.What is it/are they used for?It is/They are used for.What do you think is the most helpful or annoying invention?Its an annoying invention.Because it wakes me up when Im sleeping.alarm clock alarm clockI think computer is the most helpful invention.Because it helps me search the informat

9、ion that I puter computerPairworkDiscuss your opinions with your partners.TV,Umbrela,car,computerair-conditioner,truck,telephone,junk food,ice creamA:What do you think is the most helpful invention?B:I think the most helpful invention is the light bulb.A:Why is that?B:Well,it gives people more time

10、to work and play every day.Its used for scooping really cold ice cream.【经典习题经典习题】完成句子：完成句子：邮票是用来发送信件的。邮票是用来发送信件的。Stamps are _ _ _ letters.【要点点拨要点点拨】be used for doing sth.表示表示“被用于干某事被用于干某事”，意思与，意思与be used to do sth.相同。相同。如：如：The camera is used for taking photos.=The camera is used to take photos.used

11、 for sending【拓展延伸拓展延伸】be used as sth.表示表示“被用作某物被用作某物”。如：。如：English is used as the second language in many countries.be used by sb.表示表示“被某人使用被某人使用”，后，后接动作的执行者。如：接动作的执行者。如：These textbooks are used by students.be/get used to do sth.表示表示“习惯于做某习惯于做某事事”。如：。如：She is used to running every morning.used to do

12、 sth.表示表示“过去常常做某事过去常常做某事”。如：如：Miss Li used to dance after work.用所给单词的适当形式填空。用所给单词的适当形式填空。1.What do you think is _ (useful)one of the three?2.This machine _(use)to make noodles.3.I think the computer is a great _ (invent).4.Computers can be used for _(study)English.the most usefulis usedinventionstud

13、ying The passive voice 被动语态被动语态 语态是表示主语与谓语的关系的。如果语态是表示主语与谓语的关系的。如果主语是动作的执行者，动词要用主动语态；主语是动作的执行者，动词要用主动语态；反之，如果主语是动作的承受者，动词就反之，如果主语是动作的承受者，动词就要使用被动语态。要使用被动语态。被动语态谓语部分结构为助动词被动语态谓语部分结构为助动词be+过过去分词去分词。各种句型的被动形式各种句型的被动形式注意：注意：这里这里 be 的形式决定了被动语态的的形式决定了被动语态的时态，其后的过去分词没有变化。时态，其后的过去分词没有变化。重点内容重点内容肯定句肯定句 主语主语+

14、be+过去分词过去分词+(by)否定句否定句 主语主语+be not+过去分词过去分词+(by)一般疑问句一般疑问句 Be+主语主语+过去分词过去分词+(by)?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)?时态时态主动语态主动语态被动语态被动语态一般一般现在时现在时一般一般过去时过去时一般一般将来时将来时do/doesis/am/are+donedidwill/be going to dowas/were+donewill be donebe going to be done时态时态肯定形式肯定形式 否定形式否定形式疑问形式疑问形式一般一般过去过去时时一般一

15、般将来将来时时S+was/were+doneS+was/were+not+doneWas/Were+S+done?S+will notbe+doneS+am/is/aregoing to be doneAm/Is/Are+S+going to be done?S+am/is/arenot going to be doneWill+S+done?S+will be+done把下列句子改为被动语态。把下列句子改为被动语态。1.They made these computers in Shenzhen.These computers _ _ in Shenzhen.2.She bought a ne

16、w bike yesterday.A new bike _ _ by her yesterday.were madewas bought3.The students clean the room every day.The room _ _ by the students every day.4.He will sing a new song at the party.A new song _ _ _ by him at the party.5.Students cant take the books out of the library.The books _ _ _ out of the library by students.is cleanedwill be sungcant be takenDescribe one of your inventionsAnd then write it down.