人教版（2019）必修第二册Unit 3 The Internet Discovering useful structures课件（共20张ppt）
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| 名称 | 人教版（2019）必修第二册Unit 3 The Internet Discovering useful structures课件（共20张ppt） |  | |
| 格式 | pptx | ||
| 文件大小 | 2.3MB | ||
| 资源类型 | 教案 | ||
| 版本资源 | 人教版（2019） | ||
| 科目 | 英语 | ||
| 更新时间 | 2024-06-05 14:56:38 | ||
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(共20张PPT)
Unit 3 Discovering Useful Structures
1. Much has been written about the wonders of the World Wide
Web.
Observe and translate the following sentences, and try to find something in common from these sentences.
2. People’s lives have been changed by online communities and
social networks.
3. Many people have been helped by the club.
…已经被书写
…已经被改变
have/ has been done
…已经被做
…已经被帮助
has been written
have been changed
have been helped
Observe and translate the following sentences, and find out the differences .
have/ has done
have/ has been done
主动语态
被动语态
1. A woman has started a small online company with two friends.
1. A small online company has been started by a woman with two
friends.
2. The internet has made our lives more convenient.
2. Our lives has been made more convenient by the Internet.
…已经创办
…已经被创办
…已经使
…已经被使
has started
has been started
has made
has been made
Present perfect passive voice
现在完成时的被动语态
现在完成时的被动语态的常用结构
肯定式 主语＋have/has been done...
否定式 主语＋have/has not been done...
一般疑问式 Have/Has＋主语＋been done...？
特殊疑问式 疑问词＋have/has＋主语＋been done...？
陈述句：The author’s new story has been published.
否定句：The author’s new story has not been published.
一般疑问句：Has the author's new story been published
特殊疑问句：When has the new autohr's new story been published
结构
即学即练
present(now)
future
past
Present Perfect Tense
现在完成时
图解现在完成时态
The letter (post)
already.
has been posted
Many houses (build) for the poor so far.
have been built
用法1:被动动作发生在过去,已经完成, 对现在造成影响
或产生结果。(already, yet, so far, by now等)
现在完成时的被动语态含义用法
The machine
(repair) for two hours but it still doesn’t work.
has been repaired
Paper money (use) for over 50 years.
has been used
用法2:被动动作发生在过去,持续到现在。
(for+一段时间; since)
含义用法
常与现在完成时连用的时间标志词
already 已经(肯定句)
for a long time 很长一段时间
recently/lately 最近 so far 迄今为止
by/up to/until now 到现在为止
in recent years 在最近几年里
since... 从...起 ever since 自那以来
in/during/over the past/last years在过去的几年里
时间标志词
1. The machine has been repaired already.
2. The machine is being repaired now.
3. The machine was repaired yesterday.
说明动作发生在过去,对现在有影响, “现在修好了”
说明动作正在进行
只说明动作发生在过去，对现在无影响
4. The baby has been taken good care of.
4. The baby has been taken good care.
Attention:
在被动结构中, 动词短语的介词或副词不可去掉
5. Great changes have been taken place since 1978.
5. Great changes have taken place since 1978.
Attention:
不及物动词或词组无被动
难点突破
has been sent
was built
have been bought
巩固练习
课堂小结(1’)
现在完成时的被动语态
含义
结构
①表示过去发生的被动动作现在已经完成, 强调对现在的影响；②被动动作发生在过去,持续到现在。
have/has been done
形式
肯定式
否定式
疑问式
have/has been done
have/has not been done
Have/Has+主语+been done
特殊疑问词+have/has+主语+been done
注意事项
区分现在完成时 /一般过去时的被动
不及物动词或词组无被动
当堂检测
Great changes1.__________(take) place in my hometown in the past few decades. The public facilities(设施) 2._________________(improve) so far. Many 3.______(road) have been widen. Besides, More attention has been given to the 4._____________(environment) protection, so many trees and flowers 5._______________(plant) now. The water in the rivers as well as the air 6.___________(become) clean again. 7._____ many people say, 8.___ seems that we are now living in a “big park”. 9._________, things can get bad if we don’t appreciate 10.______we have now.
have taken
have been improved
roads
environmental
are being planted
has become
As
It
However
what
Exercises
1. First as a PC and then as a laptop, I_______________(use) in
offices and homes since the 1970s.
2. Over time my memory ______________ (develop) so much that I never forget anything I ______________(told).
3. Since the 1970s many new applications ___________________ (find)for me.
4. In recent years，stress________(regard) as a cause of a whole range of medical problems, from high blood pressure to mental illness.
has developed
have been told
have been used
have been found
has been regarded
5.(2019全国卷Ⅰ)In recent years some Inuit people in Nunavut _____________ (report) increases in bear sightings around human settlements, leading to a belief (believe) that populations are increasing.
6.(2018·全国卷Ⅱ)Diets have changed in China — and so too has its top crop. Since 2011, the country __________ (grow) more corn than rice.
7.(2018·浙江高考)While regularly eating out _______ (become)common for many young people in recent years, it's not without a cost.
Thank you
Everyone will feel extremely delighted if he________________(admit) to South
China Normal University.
You shouldn’t leave school before your homework_______________(finish).
has been admitted
has been finished
用法3:在时间/条件状语从句中表示可能
还没有发生的被动动作。
5.They have interviewed several applicants for the job.
6.They have carried out several experiments to test the performance of the new car.
7.They haven't given any permission to enter the lab since it was closed.
Several experiments have been carried out to test the performance of the new car.
Not any permission has been given to them to enter the lab since it was closed.
Several applicants for the job have been interviewed.
Unit 3 Discovering Useful Structures
1. Much has been written about the wonders of the World Wide
Web.
Observe and translate the following sentences, and try to find something in common from these sentences.
2. People’s lives have been changed by online communities and
social networks.
3. Many people have been helped by the club.
…已经被书写
…已经被改变
have/ has been done
…已经被做
…已经被帮助
has been written
have been changed
have been helped
Observe and translate the following sentences, and find out the differences .
have/ has done
have/ has been done
主动语态
被动语态
1. A woman has started a small online company with two friends.
1. A small online company has been started by a woman with two
friends.
2. The internet has made our lives more convenient.
2. Our lives has been made more convenient by the Internet.
…已经创办
…已经被创办
…已经使
…已经被使
has started
has been started
has made
has been made
Present perfect passive voice
现在完成时的被动语态
现在完成时的被动语态的常用结构
肯定式 主语＋have/has been done...
否定式 主语＋have/has not been done...
一般疑问式 Have/Has＋主语＋been done...？
特殊疑问式 疑问词＋have/has＋主语＋been done...？
陈述句：The author’s new story has been published.
否定句：The author’s new story has not been published.
一般疑问句：Has the author's new story been published
特殊疑问句：When has the new autohr's new story been published
结构
即学即练
present(now)
future
past
Present Perfect Tense
现在完成时
图解现在完成时态
The letter (post)
already.
has been posted
Many houses (build) for the poor so far.
have been built
用法1:被动动作发生在过去,已经完成, 对现在造成影响
或产生结果。(already, yet, so far, by now等)
现在完成时的被动语态含义用法
The machine
(repair) for two hours but it still doesn’t work.
has been repaired
Paper money (use) for over 50 years.
has been used
用法2:被动动作发生在过去,持续到现在。
(for+一段时间; since)
含义用法
常与现在完成时连用的时间标志词
already 已经(肯定句)
for a long time 很长一段时间
recently/lately 最近 so far 迄今为止
by/up to/until now 到现在为止
in recent years 在最近几年里
since... 从...起 ever since 自那以来
in/during/over the past/last years在过去的几年里
时间标志词
1. The machine has been repaired already.
2. The machine is being repaired now.
3. The machine was repaired yesterday.
说明动作发生在过去,对现在有影响, “现在修好了”
说明动作正在进行
只说明动作发生在过去，对现在无影响
4. The baby has been taken good care of.
4. The baby has been taken good care.
Attention:
在被动结构中, 动词短语的介词或副词不可去掉
5. Great changes have been taken place since 1978.
5. Great changes have taken place since 1978.
Attention:
不及物动词或词组无被动
难点突破
has been sent
was built
have been bought
巩固练习
课堂小结(1’)
现在完成时的被动语态
含义
结构
①表示过去发生的被动动作现在已经完成, 强调对现在的影响；②被动动作发生在过去,持续到现在。
have/has been done
形式
肯定式
否定式
疑问式
have/has been done
have/has not been done
Have/Has+主语+been done
特殊疑问词+have/has+主语+been done
注意事项
区分现在完成时 /一般过去时的被动
不及物动词或词组无被动
当堂检测
Great changes1.__________(take) place in my hometown in the past few decades. The public facilities(设施) 2._________________(improve) so far. Many 3.______(road) have been widen. Besides, More attention has been given to the 4._____________(environment) protection, so many trees and flowers 5._______________(plant) now. The water in the rivers as well as the air 6.___________(become) clean again. 7._____ many people say, 8.___ seems that we are now living in a “big park”. 9._________, things can get bad if we don’t appreciate 10.______we have now.
have taken
have been improved
roads
environmental
are being planted
has become
As
It
However
what
Exercises
1. First as a PC and then as a laptop, I_______________(use) in
offices and homes since the 1970s.
2. Over time my memory ______________ (develop) so much that I never forget anything I ______________(told).
3. Since the 1970s many new applications ___________________ (find)for me.
4. In recent years，stress________(regard) as a cause of a whole range of medical problems, from high blood pressure to mental illness.
has developed
have been told
have been used
have been found
has been regarded
5.(2019全国卷Ⅰ)In recent years some Inuit people in Nunavut _____________ (report) increases in bear sightings around human settlements, leading to a belief (believe) that populations are increasing.
6.(2018·全国卷Ⅱ)Diets have changed in China — and so too has its top crop. Since 2011, the country __________ (grow) more corn than rice.
7.(2018·浙江高考)While regularly eating out _______ (become)common for many young people in recent years, it's not without a cost.
Thank you
Everyone will feel extremely delighted if he________________(admit) to South
China Normal University.
You shouldn’t leave school before your homework_______________(finish).
has been admitted
has been finished
用法3:在时间/条件状语从句中表示可能
还没有发生的被动动作。
5.They have interviewed several applicants for the job.
6.They have carried out several experiments to test the performance of the new car.
7.They haven't given any permission to enter the lab since it was closed.
Several experiments have been carried out to test the performance of the new car.
Not any permission has been given to them to enter the lab since it was closed.
Several applicants for the job have been interviewed.