牛津深圳版 英语课件：七年级下unit5 electricity

课件61张PPT。Chapter 5 ElectricityTask 1
What do we know about
energy ? What is it ?It’s the power that
makes things work . Lead in What happens if a machine
doesn’t have energy ?It doesn’t work . Task 2Invisible 看不见的
flow through a wire,
like water
What do we know about
electricity ?Can we change
electricity into
energy ? What kinds ??Task 3 Heat energy
Movement energy
Light energy
Sound energy Look at the following things .
What kind of energy do they
produce ?Discussion:Light energyLight energy
Sound energyMovement energyHeat energyLight energyMovement energyHeat energyMovement energy
air –conditioner
washing machine
vacuum cleaner
rice cooker
television
iron
fridge
fan
micro-wave oven
recorder
radio
torch
kettle
How many home appliances
can you tell us in our life ? What kinds of energy do they produce ?
Where does electricity
come from ?Task 31. Through thin wires .
2. Be connected to cables
buried under the ground.
3. A power station.Readingelectricity n. 电 electrician n. 电工
There is a problem with the electricity in Tom’s
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 can’t 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。abac
cccontainpolitelyin a wayflowstrick: v/n 戏弄,欺骗
It’s wrong to trick others.=It’s wrong to fool others
=It’s wrong to play tricks (a trick) on others.=
It’s wrong to play jokes (a joke) on others
2. 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 .It’s 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. ---- What’s 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 right
by 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 lastlook foolishflow throughin a way be connected to cablesa light bulb scratch one’s headdifferent forms of energya power stationme=BennyIt=electricityit=electricityThey=cablesThey=batterieswirecablestreetpower stationYesI was able to trick Daisy at lastNOWe can’t see electricity, but we can change it into different forms of energyNOWho is looking foolish now, BennyListeningUnderstanding the main points of a dialogueThere is a problem with the electricity in Benny’s flat. An electrician came to deal with this problem. Listen to the conversation between the electrician and Benny’s 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 can’t
A bird can fly .
Fish can’t live without water.
2. 告诉人们必须或禁止做某事用must或mustn’t
You must hand in your homework at once.
You mustn’t 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
shouldn’t , 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
needn’t 或don’t have to表示不必，而不用
mustn’t 。
Must we stay here ?
No, you need n’t . ( No, you don’t have to .)
3、 must be 表示肯定的猜测，意为“一定……”
can’t 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 can’t 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 . It’s so clean .他们一定打扫过房间了， 它这么干净。Ⅰ.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.Don’t 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 can’t play with you. I __________finish my homework first.
7.I__________ get up early tomorrow.
8.______________you please open the window? Cancouldn’t maycouldcan’t must mustCould9. 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. It’s 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 .It’s very wet .It _______
have rained last night. canCanmustCan/MaymustMay/CanCan/CouldMustneedn’tcan/maycan’t 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 couldn’t 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 can’t understand it.
( explanation )
6. I don’t 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 ) changeableentranceinvisibleburiedexplainplayingsmooth can’t 9. The rain stopped us from _________ to school .(go)
10. When he came into the office, he found his staff busy
_____ . ( work )
11. Don’t ______ out of the window . It’s dangerous .(lean)
12. These wires are ______ to the cables buried
under the ground. (connection)
13. That’s not a bad ____________. ( explain)
14. Electricity comes from a _________ station. (powerful)
15. Long ago , when people died , they are usually _____.
(bury)
16. Don’t touch the wire .You will get an ________
shock .( electricity)
17. Tom is an _____ boy . He never feels tired .(energy)
18.There was an _____ repairing the electric appliance .
(electricity) goingworkingleanconnectedexplanationpowerburiedelectricalenergeticelectricianSpeaking
Writingkeep their desksbe politedressstandlean out ofread comicssleep1,2,3,4,5,6,7,8Thank you !