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(共22张PPT)
Unit 3 The Internet
Discovering Useful Structures
Talk about something that has been done
现在完成时的被动语态
Read the pairs of sentences. Underline and compare the different verb forms.
Jan’s life has been greatly improved by the Internet.
Much has been written about the wonders of the World Wide Web.
The Internet has greatly improved Jan’s life.
People have written much about the wonders of the World Wide Web.
The students have cleaned the classroom.
The classroom has been cleaned. You needn’t clean it now.
现在完成时
active
passive
表示说话时已经完成的被动性的动作或结果，主语是动作的承受者。
现在完成时的被动语态
现在完成时
被动语态
have/has been done
现在完成时的被动语态
be done
have/has been
How do we form the present perfect passive voice
现在完成时的被动语态
Let’s learn
Read the pairs of sentences. Underline and compare the different verb forms.
Jan's life has been greatly improved by the Internet.
Much has been written about the wonders of the World Wide Web.
The Internet has greatly improved Jan’s life.
People have written much about the wonders of the World Wide Web.
How do we form the present perfect passive voice Fill the blank.
Let’s learn
Verb form
Active
Passive
have/has + v-ed
____________________
have/has been + v-ed
Change the sentences into the present perfect passive voice.
EXAMPLE
They’ve built a kind of new PC with more functions.
↓
A kind of new PC has been built with more functions.
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
present perfect passive voice
3.Jan's life has been greatly improved by the Internet.
2.Their lives have been changed by Jan.
3.The Internet has greatly improved Jan's life.
2.Jan has changed their lives.
1.The club has helped many
people.
Underline and compare the different verb forms.
Verb form
Active:
Passive:
have/has done
have/has been done
1.Many people have been helped by the club.
present perfect active voice
How
Examples
1.The Internet has greatly improved Jan’s life.
2.People have written much about the wonders of the World Wide Web.
Jan's life has been greatly improved by the Internet.
Much has been written about the wonders of the World Wide Web.
When
object
1.the subject is having something done to it
2.the doer of an action is unknown,or not important,or perferred not named.
similar meaning
doing an action
having something done to it
subject
the doer of an action is not necessarily mentioned
subject
Similarities and differences in meaning and function
1
2
1
2
convey a
similar
meaning
the subject is doing an action to the object
often used as they are more direct
the subject is having
something done to it
often used when the doer of an action is unknown,or not important,or perferred
not named
Active
Passive
Exercise
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
4. Have you pressed the button yet to copy the file
5. Has anyone made a comment about the online database
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
Has the button been pressed yet to copy the file
Has a/any comment been made about the online database
Change the sentences into the present perfect passive voice
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
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
Thank you!

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