资源简介

(共19张PPT)
Unit 3 The Internet
Discovering Useful Structures
Teaching objectives:
By the end of this period, you will be able to…
analyze the forms and features of the present perfect passive voice.
find out the differences in meaning and function between the active and passive forms.
master the functions of the present perfect passive voice in the context and use it in real situations.
What aspects in your life have been changed since the appearance of the Internet
Lead in
Before After
Transport
Reading
Payment
Entertainment
Try to tell the changes according to the table using the present perfect passive voice.
foot; bike; bus; train plane; high-speed rail
paper books E-books
in cash; by credit E-payment
watch movies in the theater…
Stream movies and music ; chat online…
1. Jan’s life has been greatly improved by the Internet.
The Internet has greatly improved Jan’s life.
2. Much has been written about the wonders of the World Wide Web.
People have written much about the wonders of the World Wide Web.
Observe and analyze
Underline and compare the different verb forms.
Active __________________
Passive _________________
The form of the present perfect passive voice
Verb form
have/has +v-ed
have/has been +v-ed
Practice
Change the sentences into the present perfect passive voice.
Example
They have 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
4. Have you pressed the button yet to copy the file
5. Has anyone made a comment about the online database
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
What are 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.
We use it when something has been done by someone at sometime up to now.
We are not interested in the actor(行动者).
Subject and its verb should be in a agreement.
the present perfect passive voice
Complete the notice with the correct forms of the verbs in brackets. (Workbook P75 Activity 4)
Notice to parents
Dear Parents,
We hope you will welcome this news. Almost 100 computers ___________(give) to us by a local computer company since the end of last year. A decision ____________(make) to begin a computer teaching experiment at our school. Our plan ________________(support) with technical equipment and advice which _______________(provide) by the City Information Technology Center. Every teacher _________________(provide) with a laptop since the beginning of this term.
More importantly, most of our courses ________________(teach) using computers. We ________________(help) in our teaching by a lot of information from the Internet. Also, a new computer room _______________(set up) in our school. We hope you will be happy with this exciting new development in our school.
No. 8 Senior High School
has been made
has been given
has been supported
has been provided
has been provided
have been taught
have been helped
has been set up
一、含义：
1、表示动作发生在过去, 到现在已经完成或对现在产生的影响。2、动词和被修饰主语构成被动关系。
二、构成：
肯定式：have/has been done
否定式：have/has not been done
一般疑问句：Have/Has +主语+ been done
特殊疑问句：疑问词+have/has +主语+been done
三、解题步骤 1.找时 2.圈主 3.定谓
Summary
1. The problem has been discussed for 2 days.
2. Many new buildings have been built in the past few years.
3. Two novels have been written by him so far.
4. The computer has been used every day since I bought it.
5. The dirty clothes have already been cleaned.
三、现在完成时被动语态用法
（一）找出表示时间状语的词语并总结用法。
表示一个被动的动作或状态从过去开始一直持续到现在，常连用的时间状语有：for+段时间，since +时间状语(从句)，these days, so far, up to now, in the last/ past few years等,总结如下.
常与现在完成时连用的时间状语：
already 已经(肯定句)
yet 已经（否定句或者疑问句）
recently/lately 最近 since then 从那时起
ever since 自那以来 ever 曾经
so far 迄今为止 for a long time 很长一段时间
by now 到现在为止 in recent years 在最近几年里
in/during/over the past/last years在过去的几年里
（二）表某被动动作对现在造成的影响或结果，常与already, yet, just, ever, never, recently等连用。
即学即练：
The bike____________________(not repair) yet.
I _____ already________________(introduce) to Mr. Smith.
注意：有些动词没有被动语态, 如不及物动词happen, take place, break out等。
Great changes __________(take) place in my hometown in the past ten years.
has not been repaired
have
been introduced
have taken
现在完成时被动语态的解题步骤
1.找时：找与现在完成相对应的时间状语；
2.圈主：主语与动词构成被动关系；
3.定谓：确定谓动形式：have/ has (not) been done。
一.单句语法填空
1．Their new house _______________(decorate) for two months and they will settle in it in the near future.
2．Their new cars _________________(advertise) on the Internet for a long time.
3．All the athletes _______________ (select) from millions of people all over the country in the past two months.
4．Great changes ___________ (take)place in my hometown in the past ten years.
5. She _________ (return) this book to the library already.
has been decorated
have been advertised
have been selected
have taken
has returned
(P30 T2) Change the sentences into the present passive voice.
Example: They've bulit a kind of new PC with more functions.
→ A kind of new PC has been built with more functions.
I have downloaded the software to help my phone battery last longer.
Someone has lost an identity card.
Have you confirmed the Wi-Fi password
Have you pressed the button yet to copy the file
Has anyone made a comment about the online database
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
The Internet is bringing great changes to modern plete the text with
the correct forms of the words in brackets.
The world_________________________ (turn upside down)since the invention of the Internet and the introducton of personal computers into nearly every home. The twin inventions of the personal computer and the Internet__________________ (consider) to be among the two most important events of the last century. Shopping_________________________ ( completely change). Rather than going out to stores weekly or even daily more and more people order things from clothes to toys to foods
online and have them delivered directly to their homes. Social communication__________________ (take over) by the Internet In the past, letters, phone calls, and face-to-face meetings were necessary to build up relationships, but now online communication is often the only social interaction that some people have all day! Games, music, movies and so on________________________(heavily influence)by the Intemet. New kinds of crimes are happening on the Intemet, too, so cyber security has to be constantly updated
has been turned upside down
have been considered
has been completely changed
has been taken over
have been heavily influenced

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