Unit 3 The lnternet Discovering useful structures课件(共23张PPT，内镶嵌视频)人教版(2019)必修第二册
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| 名称 | Unit 3 The lnternet Discovering useful structures课件(共23张PPT，内镶嵌视频)人教版(2019)必修第二册 |  | |
| 格式 | pptx | ||
| 文件大小 | 6.7MB | ||
| 资源类型 | 教案 | ||
| 版本资源 | 人教版（2019） | ||
| 科目 | 英语 | ||
| 更新时间 | 2025-10-03 23:14:15 | ||
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(共23张PPT)
Unit 3 The Internet
Discovering useful structures
present perfect passive voice
Active and passive voices
单击输入您的封面副标题
Lead-in
被动语态复习
一、什么是语态？
语态是英语动词的一种表现形式，用来说明_________和__________之间的关系。
二、语态的种类：___________和____________
主语
谓语动词
主动语态
被动语态
挑事儿：
If you think you're such a tough guy, then hit me.
You hit me!
Come and help me!
I was hit / beaten.
present(now)
future
past
过去的动作一直持续到现在
过去的动作对现在产生影响
The Present Perfect Tense 现在完成时
have/has done
主动
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 done
How do we form the present perfect passive voice
现在完成时的被动语态
Jan's life has been greatly improved by the Internet.
Much has been written about the wonders of the World Wide Web.
Let’s learn
Read the pairs of sentences. Underline and compare the different verb forms.
The Internet has greatly improved Jan’s life.
People have written much about the wonders of the World Wide Web.
主动
被动
Verb form
(动词形式)
How do we from the present perfect passive voice Fill the blank.
Active(主动)
have/has + v-ed
Passive(被动)
____________________
have/has + been v-ed
现在完成时(主动语态)
结构：have/has + done
现在完成时(被动语态)
结构：have/has + been done
主语 + have/ has + been + V-过去分词(been done)
助动词,无意义
一、现在完成时的被动语态 结构
Many students have already been affected by the virus of Omicron.
肯定句
Many students have already been affected by the virus of Omicron.
Have many students been affected by the virus of Omicron yet
Who have been affected by the virus of Omicron yet
①否定句：
Many students have not been affected by the virus of Omicron yet.
②一般疑问句：
③特殊疑问句（对划线部分提问）：
主语 + have/has+ not + been + done...
Have/Has + 主语 + been + done...？
疑问词 + have/has + 主语 + been + done...？
二、现在完成时的用法
(1) 表示到现在为止已经完成或刚刚完成的动作。
Eg：
① Now we have planted all the trees.
② He has just come back.
③ They have built many buildings in this city.
Someone has broken the window.
I have already lost the key.
I haven’t read that book yet.
I have just cleaned my hands.
二、现在完成时的用法
(2) 表示过去发生的动作, 强调结果或对现在的影响。
常与already, yet (到现在还没有), just (刚刚), ever 等词连用.
already: 常用于肯定句中
yet: 常用于否定句,疑问句尾
(窗户现在是坏的)
(我现在没有钥匙)
(不了解书的内容)
(手是干净的)
She has learned English for 5 years.
她学英语有五年了。
He has lived in Beijing since （自从） 5 years ago.
他五年前就住在北京了。
二、现在完成时的用法
(3) 表示从过去开始并持续到现在的动作或状态，常与包括现在在内的一段时间的状语连用。
for＋时间段（一段时间）
常与现在完成时连用的时间状语有：
already 已经 yet 已经
recently/lately 最近 since then 从那时起
ever since 自那以来 eve 曾经
so far/up till now 迄今为止 by now 到现在为止
for a long time 很长一段时间
in recent years 在最近几年里
in/during/over the past/last years 在过去的几年里
主动语态变被动语态的原则
“三变”
例：They have built nine parks.
原句主语 by的宾语
宾语 主语
谓语由主动 被动
“三不变”
原句意思不变
原句时态不变
原句主谓宾以外成分不变
Nine parks _________________ by them.
have been built
Please find out the differences between the two pictures.
Sentence pattern：
“… has been …”
e.g.
One apple has been eaten.
眼力大比拼
1. Paper money ____________ (use) for over a thousand years.
2. — _____ the letter __________ (give) to Mr. Black
— No. It’s still on the desk.
3. Great changes ___________ (take) place in my hometown and a lot of factories ____________ (set) up.
has been used
Has
been given
have taken
have been set
Complete the sentences.
Complete the sentences.
4. —How long _____________________ (employ) at this job
—Since 1999.
5. When and where to go for the on-salary holiday __________________ (not, decide) yet.
6. I like these English songs and they ______________ (teach) many times on the radio.
7. All the preparations for the task
__________________ (complete), and we’re ready to start.
have been taught
have been completed
has not been decided
have you been employed
SUMMMARY
现在完成时的被动语态
含义
结构
表示过去发生的被动动作现在已经完成或仍将持续, 强调对现在的影响
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
用法
表示已经完成的被动动作
表示过去开始的被动动作一直持续到现在
表示某被动动作对现在造成的影响或结果
注意事项
动词短语不可分割也不可省略其中的介词和副词
不及物动词或词组无被动
Change the sentences into the present perfect passive voice.
They’ve built a kind of new PC with more functions.
A kind of new PC has been built with more functions.
EXAMPLE
↓
I have downloaded the software to help my phone battery last longer.
Someone has lost an identity card.
The software has been downloaded to help my phone battery last longer.
An identity card has been lost.
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
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
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. I have also ___________(put) into robots and used to make mobile phones as well as________ (help) with medical operations.
has developed
have been told
have been used
have been found
been put
help
Thank you
Unit 3 The Internet
Discovering useful structures
present perfect passive voice
Active and passive voices
单击输入您的封面副标题
Lead-in
被动语态复习
一、什么是语态？
语态是英语动词的一种表现形式，用来说明_________和__________之间的关系。
二、语态的种类：___________和____________
主语
谓语动词
主动语态
被动语态
挑事儿：
If you think you're such a tough guy, then hit me.
You hit me!
Come and help me!
I was hit / beaten.
present(now)
future
past
过去的动作一直持续到现在
过去的动作对现在产生影响
The Present Perfect Tense 现在完成时
have/has done
主动
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 done
How do we form the present perfect passive voice
现在完成时的被动语态
Jan's life has been greatly improved by the Internet.
Much has been written about the wonders of the World Wide Web.
Let’s learn
Read the pairs of sentences. Underline and compare the different verb forms.
The Internet has greatly improved Jan’s life.
People have written much about the wonders of the World Wide Web.
主动
被动
Verb form
(动词形式)
How do we from the present perfect passive voice Fill the blank.
Active(主动)
have/has + v-ed
Passive(被动)
____________________
have/has + been v-ed
现在完成时(主动语态)
结构：have/has + done
现在完成时(被动语态)
结构：have/has + been done
主语 + have/ has + been + V-过去分词(been done)
助动词,无意义
一、现在完成时的被动语态 结构
Many students have already been affected by the virus of Omicron.
肯定句
Many students have already been affected by the virus of Omicron.
Have many students been affected by the virus of Omicron yet
Who have been affected by the virus of Omicron yet
①否定句：
Many students have not been affected by the virus of Omicron yet.
②一般疑问句：
③特殊疑问句（对划线部分提问）：
主语 + have/has+ not + been + done...
Have/Has + 主语 + been + done...？
疑问词 + have/has + 主语 + been + done...？
二、现在完成时的用法
(1) 表示到现在为止已经完成或刚刚完成的动作。
Eg：
① Now we have planted all the trees.
② He has just come back.
③ They have built many buildings in this city.
Someone has broken the window.
I have already lost the key.
I haven’t read that book yet.
I have just cleaned my hands.
二、现在完成时的用法
(2) 表示过去发生的动作, 强调结果或对现在的影响。
常与already, yet (到现在还没有), just (刚刚), ever 等词连用.
already: 常用于肯定句中
yet: 常用于否定句,疑问句尾
(窗户现在是坏的)
(我现在没有钥匙)
(不了解书的内容)
(手是干净的)
She has learned English for 5 years.
她学英语有五年了。
He has lived in Beijing since （自从） 5 years ago.
他五年前就住在北京了。
二、现在完成时的用法
(3) 表示从过去开始并持续到现在的动作或状态，常与包括现在在内的一段时间的状语连用。
for＋时间段（一段时间）
常与现在完成时连用的时间状语有：
already 已经 yet 已经
recently/lately 最近 since then 从那时起
ever since 自那以来 eve 曾经
so far/up till now 迄今为止 by now 到现在为止
for a long time 很长一段时间
in recent years 在最近几年里
in/during/over the past/last years 在过去的几年里
主动语态变被动语态的原则
“三变”
例：They have built nine parks.
原句主语 by的宾语
宾语 主语
谓语由主动 被动
“三不变”
原句意思不变
原句时态不变
原句主谓宾以外成分不变
Nine parks _________________ by them.
have been built
Please find out the differences between the two pictures.
Sentence pattern：
“… has been …”
e.g.
One apple has been eaten.
眼力大比拼
1. Paper money ____________ (use) for over a thousand years.
2. — _____ the letter __________ (give) to Mr. Black
— No. It’s still on the desk.
3. Great changes ___________ (take) place in my hometown and a lot of factories ____________ (set) up.
has been used
Has
been given
have taken
have been set
Complete the sentences.
Complete the sentences.
4. —How long _____________________ (employ) at this job
—Since 1999.
5. When and where to go for the on-salary holiday __________________ (not, decide) yet.
6. I like these English songs and they ______________ (teach) many times on the radio.
7. All the preparations for the task
__________________ (complete), and we’re ready to start.
have been taught
have been completed
has not been decided
have you been employed
SUMMMARY
现在完成时的被动语态
含义
结构
表示过去发生的被动动作现在已经完成或仍将持续, 强调对现在的影响
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
用法
表示已经完成的被动动作
表示过去开始的被动动作一直持续到现在
表示某被动动作对现在造成的影响或结果
注意事项
动词短语不可分割也不可省略其中的介词和副词
不及物动词或词组无被动
Change the sentences into the present perfect passive voice.
They’ve built a kind of new PC with more functions.
A kind of new PC has been built with more functions.
EXAMPLE
↓
I have downloaded the software to help my phone battery last longer.
Someone has lost an identity card.
The software has been downloaded to help my phone battery last longer.
An identity card has been lost.
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
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
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. I have also ___________(put) into robots and used to make mobile phones as well as________ (help) with medical operations.
has developed
have been told
have been used
have been found
been put
help
Thank you