七年级英语electricity课件5

Unit 4 Electricity,Reading,electricity n. 电 electrician n. 电工There is a problem with the electricity in Toms flat . An electrician has come to deal with it . electric a. 电的 electric storm electric shock electrical a. 电气科学的electrical apparatus 电器electrical engineer,Words and expressions in Reading A What do you know about:,change v/n. 变化We cant see electricity , but we can change it into energy .Great changes have taken place in Shenzhen since 1980. changeable a. The weather is changeable on top of the mountain . n. 找头；（找回的）零钱Here is your change.,energy n. Young people usually have more energy than the old. 年轻人通常比老年人有活力。 energetic a. 1. He is an energetic boy; he enjoys sports. 2.The more the young students worked, the more energetic they became. 这些年青学生们越干越有劲。,a,b,a,c,c,c,contain,politely,in a way,flows,trick: v/n 戏弄,欺骗Its wrong to trick others.=Its wrong to fool others=Its wrong to play tricks (a trick) on others.=Its wrong to play jokes (a joke) on others2. at last = in the end =finally I finished my work at last . I finished my work in the end . I finished my work finally .,3. flow through Elctricity flows through a wire .Its like water ,in a way .,Words and expressions in Reading B :,4. look like =be like 1. He looks like his father .= He is like his father .2. - Whats he like ?=What does he look like? - He is short and fat .5. in a way (partly)在某种程度上, 稍稍In a way , I agree with him . Some of his ideas are rightby the way By the way , can you tell me when we will leave ?in the way The table is in the way .Please move it .on the way On the way to school , I saw Ken .in this way I have collected many stamps in this way .,6. explain v. explanation n. Can you explain it to me ? = Can you give an explanation about it to me ?7. form v. 组成 n. 形式1.Mike formed a football team in his class with his classmates last term .2. We can change it into different forms of energy.3. She has a tall graceful form. 她有着高大优雅的外形。,8 be connected to 1. The wires in our flat are connected to cables buried under the street . 2. Hong Kong and Shenzhen are connected by Luohu Bridge . connect v. 1. （常与to, with连用）连接；结合；连结 Will you connect this wire to the television? 你把这根电线和电视机连上好吗？ 2 . 接通电话Connect me with Beijing University. 给我接北京大学。,9 bury v. buried buried When people died , they are usually buried .,10. cable n. 电缆 wire: n. 电线Computers are connected with each other by means of cables.,11. contain v. 包含；容纳；装有Beer contains alcohol.啤酒含有酒精。The envelop contains some photos of her family.,Phrases : 1. 转化,变成 2. 戏弄某人 3. 最后4. 看上去很傻 5. 流经 6. 某种意义上 7. 看电缆联结在一起8. 电灯泡 9. 挠头 10. 不同形式的能量11. 发电站,change into,trick sb,at last,look foolish,flow through,in a way,be connected to cables,a light bulb,scratch ones head,different forms of energy,a power station,me=Benny,It=electricity,it=electricity,They=cables,They=batteries,wire,cable,street,power station,Yes,I was able to trick Daisy at last,NO,We cant see electricity, but we can,change it into different forms of energy,NO,Who is looking foolish now, Benny,Listening,Understanding the main points of a dialogue,There is a problem with the electricity in Bennys flat. An electrician came to deal with this problem. Listen to the conversation between the electrician and Bennys mother. Find out which things were on or off when the electricity stopped, and circle ON or OFF next to the objects.Before you listen, make sure you know the following words:Vacuum v. 用真空吸尘器清扫 properly adv. 正确地,恰当地Iron v.熨,烫平 plug n.插头,lights air conditioner fridge,kettle washing machine television,vacuum cleaner rice cooker iron,Language 情态动词,情态动词不能单独作谓语动词，后接其它动词原形做谓语，没有人称和数的变化。,表示能够或不能做某事用can 或 cant A bird can fly . Fish cant live without water.2. 告诉人们必须或禁止做某事用must或mustnt You must hand in your homework at once. You mustnt talk loudly in public.,3. 表示请求或允许做某事may 或can May I come in ? Can I open the door ?4 .谈论该做或不该做某事用should , ought to 或 shouldnt , ought not to She should do her homework first . They ought to finish the work on time . they ought not to be late for school .,Notes : 1、can 和 be able to的区别 : be able to 有 人称数和时态的变化。 I can come tomorrow . I will be able to come tomorrow.2、 在回答must的疑问句时，否定回答常用 neednt 或dont have to表示不必，而不用 mustnt 。 Must we stay here ? No, you need nt . ( No, you dont have to .)3、 must be 表示肯定的猜测，意为“一定” cant be 表示否定的猜测，意为“ 不可能”,She must be a nurse . I saw her in the library just now .She cant be here .4、must have done 也表示肯定的猜测，意为“ 一定做过”They must have cleaned the room . Its so clean .他们一定打扫过房间了， 它这么干净。,.用适当的情态动词填空：。1._you swim?2.We _operate the machine last week, but we can operate it now.3.Dont worry. You _ return me this book tomorrow.4.He said if he _ask me another question.5.My grandma is ill. You _ talk so loudly here .6.I cant play with you. I _finish my homework first.7.I_ get up early tomorrow.8._you please open the window?,Can,couldnt,may,could,cant,must,must,Could,9. Nobody _live without air.10._he speak Chinese ?Yes ,a little.11. The book _ be returned before Saturday.12._I come in ?Yes ,please.13. You _give up smoking at once. Its bad for your eyes.14. Excuse me ._I ask you a question?15. _you tell me where the station is ?16. _ I finish the work now ?No, you _. You _ do it this evening.17. May I use your e-dictionary ? Sorry , you _. I am using it now .18. Look at the ground .Its very wet .It _ have rained last night.,can,Can,must,Can/May,must,May/Can,Can/Could,Must,neednt,can/may,cant,must,同义句改写:1.You must clean your room yourself. You _ _ clean your room yourself.2. She can dance beautifully. She _ _ _ dance beautifully.3. Wash your face at once. You _ wash your face _.4. Tom couldnt find his bag. He _ not _ _to find his bag.5. Everyone ought to be here on time. Everyone _ _here on time.,have to,is able to,must,were able to,should be,immediately,Fill in the blanks with the words given in their proper forms :1.The weather in London is _.( change)2. Please wait for me at the main _ to the museum.( enter )3. Air is _. ( visible )4. The scientists found some mummies _ under the pyramids . ( bury )5. Can you _ it to me again ? I cant understand it.( explanation )6. I dont feel like _ football in the street .(play)7. I prefer this kind of cloth. It feels _. ( smoothly)8. A: He must be in the office . B: He _be there . I saw him talking to his friend in the classroom just now . ( can , may , must ),changeable,entrance,invisible,buried,explain,playing,smooth,cant,9. The rain stopped us from _ to school .(go)10. When