资源简介

(共25张PPT)
Unit 3 The Internet
【版本：新人教　册别：必修二】
Discovering Useful Structures
目录页
contents
Lead-in
Ⅰ
Language points
Present perfect passive voice
Ⅱ
Homework
III
Ⅳ
Look at the way your face has been washed
Look at the way your teeth have been brushed
Look at the way your shoes have been cleaned
You’d better do them again.
Look at the way the flowers have been planted
Look at the way the grass has been cut
Look at the way the paths have been swept
I hope that you’ll come here again.
Lead-in: Appreciate a poem
Look at the way your face has been washed
Look at the way your teeth have been brushed
Look at the way your shoes have been cleaned
You’d better do them again.
Look at the way the flowers have been planted
Look at the way the grass has been cut
Look at the way the paths have been swept
I hope that you’ll come here again.
Lead in: Appreciate a poem
What’s the common verb form of these sentences
Verb form: present perfect passive voice
have / has been done
Ⅱ
Present perfect
passive voice
1. Much has been written about the wonders of the World Wide Web.
2. People’s lives have been changed by online communities and social networks.
3. Many people have been helped by the club.
4. Jan’s life has been greatly improved by the Internet.
Can you find the sentences with the present perfect passive voice in the passage on P28
Present perfect passive voice
Present perfect passive voice
1. Much has been written about the wonders of the World Wide Web.
2. People’s lives have been changed by online communities and social networks.
3. Many people have been helped by the club.
4. Jan’s life has been greatly improved by the Internet.
1. People have written much about the wonders of the World Wide Web.
2. Online communities and social networks have changed people’s lives.
3. The club has helped many people.
4. The Internet has greatly improved Jan’s life.
Which group is better Why
Compare and Find
一、现在完成时的被动语态的句式：
Present perfect passive voice
The research has been done successfully.
现在完成时被动语态的肯定式：have / has been done
The author’s new story has not been published.
现在完成时被动语态的否定式：have / has not been done
Has his washing machine been repaired
现在完成时被动语态的一般疑问句：把have / has提到主语的前面
Why has he been invited
现在完成时被动语态的特殊疑问句：特殊疑问词 + have / has +主语+been done
1.你的车已经修好了。
Your car has been repaired.
2.地面还没打扫干净。
The floor has not been cleaned.
3.那些房间粉刷了吗
Have those rooms been painted
4.这部电影已经放映多久了？
How long has this film been on
Present perfect passive voice
语态用来表示主语与谓语之间的关系，它是动词的一种形式。英语中有两种语态：主动语态和被动语态。主动语态表示主语是动作的执行者，而被动语态表示主语是动作的承受者。
思考：什么时候用被动语态？
不知道动作的执行者
没有必要指出动作的执行者
强调动作的承受者
2.Change the sentences into the present perfect passive voice.
1.They’ve built a kind of new PC
with more functions.
A kind of new PC has been
built with more functions.
…已经被建造
现在完成时
主动： 被动：
1) 动作或状态从过去开始,一直持续到现在, 常与下列时间状语连用: so far, up to now, up till now, by now, recently, lately, in recent years; (ever) since+一般过去时, in / during / over the past / last... years/months/days/weeks, over the years
1.His first novel has received good reviews since it came out last month.
2) 动作或状态发生在过去,但对现在有影响或结果
2.I got caught in the rain and my suit has been damaged.
have/has done
have/has been done
现在完成时
主动： 被动：
3) 固定句型:It / This / That is the first (second, third…) time that… +现在完成时，表示“第几次做某事”
3.This is the first time we have seen a film in the cinema together as a family.
have/has done
have/has been done
练习
1.Every means ______(try) to protect pandas over the past 10 years.
2.Many kinds of apps ______(create) to attract young people to play games so far.
3.Many words _____(add) to the language since it was published.
has been tried
have been created
have been added
练习
4.Many scientific centres ______(establish) throughout China in recent years.
5.Up to now, researchers _______(find) at least five species on the island.
have been established
have found
练习
1.By the time Jack returned from home from England, his son ____________(graduate) from college.
2.It was the first time that he _______(leave) his native land.
had graduated
had left
(by the time截止，在……之前)
1. I have downloaded the software to help my phone battery last longer.
2. Someone has lost an identity card.
3. Have you confirmed the Wi-Fi password
The software has been downloaded to help my phone battery last longer.
An identity card has been lost.
Has the Wi-Fi password been confirmed
4. Have you pressed the button yet to copy the file
5. Has anyone made a comment about the online database
Has the button been pressed yet to copy the file
Has a/any comment been made about the online database
Find out the differences in meaning and function between the active and passive forms.
The object in an active sentence becomes the subject in a passive sentence.
Both sentence types convey a similar meaning, but they are slightly different.
Active sentences are used often, as they are more direct. Passive sentences are often used when the doer of an action is unknown, not important, or preferred not named.
the present perfect passive voice
We use it when something has been done by someone at sometime up to now.
We are not interested in the actor/doer(行动者).
Subject and its verb should be in a agreement.
1. 用现在完成时的被动语态改写、翻译句子。
①Jack’s boss has always praised him for his devotion to work.
Jack ___________________________ by his boss for his devotion to work.
②They have found a good place to build a temple in the village.
A good place to build a temple in the village ___________________ .
③We haven’t yet decided how to solve that difficult technological problem.
How to solve that difficult technological problem ___________________ yet.
④当我的家庭作业完成时我就回家。
I will go home when my homework _________________.
⑤纸币已被使用了1000多年了。
Paper money _________________ for over one thousand years．
has always been praised
hasn’t been decided
has been found
巩固强化
has been finished
has been used
6．中国的各项事业已取得了新的进展。
New progress_________________ in various areas in China.
7．我的家庭作业已经做完了。
My homework___________________.
8．近几年他各种各样的书被出版了。
A variety of his books _____________________ in recent years.
9．从 1949 年起，政府就已经非常重视儿童的健康和保健。
Since 1949, great attention __________________the health and care of children by the government.
has been made
has been finished
have been published
has been paid to
2. 将下面句子变为被动语态
①I have asked her to help you．
→________________________________________________________
②We have planted many trees on the hill in the last 5 years．
→________________________________________________________
③He has sent me an e mail．
→________________________________________________________
→________________________________________________________
She has been asked by me to help you.
Many trees have been planted on the hill by us in the last 5 years.
I have been sent an e-mail by him.
An e-mail has been sent to me by him.
巩固强化
Read the poem and underline the present perfect
passive voice in the following poem.
Look at the way your face has been washed
Look at the way your teeth have been brushed
Look at the way your shoes have been cleaned
You’d better do them again.
Look at the way the flowers have been planted
Look at the way the grass has been cut
Look at the way the paths have been swept
I hope that you’ll come here again.
Appreciate
Think of your own situation and write a similar poem.

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