人教版（2019）必修 第二册Unit 3 The internet Discovering Useful Structures 课件(共18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18张PPT) |  | |
| 格式 | pptx | ||
| 文件大小 | 1.1MB | ||
| 资源类型 | 教案 | ||
| 版本资源 | 人教版（2019） | ||
| 科目 | 英语 | ||
| 更新时间 | 2024-04-05 15:59:04 | ||
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(共18张PPT)
Discovering Useful Structures—The present perfect passive voice
The Internet
Unit 3
语境 感悟
阅读以下短文，感知加颜色部分，完成下面的练习
Dreams of finding lost treasure almost came true recently.A new machine called “The Revealer” has been invented and it has been used to detect gold which has been buried in the ground.The machine was used in a cave near the seashore where—it is said—pirates used to hide gold.The pirates would often bury gold in the cave and then fail to collect it.Armed with the new machine，a search party went into the cave hoping to find buried treasure.The leader of the party was examining the soil near the entrance to the cave when the machine showed that there was gold under the ground.Very excited，the party dug a hole two feet deep.
They finally found a small gold coin which was almost worthless.The party then searched the whole cave thoroughly but did not find anything except an empty tin trunk.In spite of this，many people are confident that some valuable things have been revealed by “The Revealer”.
加颜色部分所使用的时态和语态是 ，其构成为：
。
自主发现
返 回
现在完成时的被动语态
have/has been＋过去分词
语法 精讲
现在完成时的被动语态表示到现在为止某事已经被完成或被做。
运用现在完成时的被动语态时应掌握以下几个方面：
一、现在完成时的被动语态的常用句式
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...？
He has been selected to take part in the sports meeting.
他已被选中参加这次运动会。
To Tom’s disappointment，his novel has not been published.
让汤姆失望的是，他的小说还没有被出版。
Has the date for the next meeting been decided
下次会议的日期已经确定了吗？
How many residents have been invited to the conference？
有多少居民受到了参会的邀请？
二、现在完成时的被动语态的用法
1.表示被动的动作在说话之前已经完成，强调过去的动作对现在造成的影响或产生的结果，通常与already，yet，never，recently等副词及时间状语so far，by now，up to/till now，since等连用。
The database has already been updated.
数据库已经被更新了。(现在可以使用新的数据库了)
2.表示一个被动的动作或状态从过去开始一直持续到现在，并可能继续持续下去，常与for或since等引出的时间状语(从句)连用，或用于由how long引出的句子中。
Financial problems of the company have been discussed for nearly two hours.
公司的财务问题已经被讨论了近两个小时了。(可能还会继续被讨论)
3.用在条件、时间状语从句中，表示从句动作先于主句动作完成。
You shouldn’t leave school before your homework has been finished.
在你的作业完成之前你不应该离开学校。
三、使用现在完成时的被动语态要注意以下六点问题
1.与一般过去时的被动语态的区别。一般过去时的被动语态所表示的动作或状态与现在的情况没有联系，而现在完成时的被动语态则强调与现在的情况有联系。
The park was opened to the public last year.
这个公园去年向公众开放。(说明动作发生于过去)
The park has been opened to the public.
这个公园已向公众开放。(说明动作发生于过去，但对现在有影响，即现在公园已经向公众开放了)
2.非延续性动词，如borrow，finish，begin，start，buy，marry，open，join等构成的现在完成时的被动语态不能与表示一段时间的状语连用。若要表达相应的意思，则要改换动词或时间状语。
The work was finished two weeks ago.
这项工作于两周前被完成。
The work has been finished.
这项工作已经被完成。
3.短语动词是一个不可分割的整体，在被动语态中要保持其完整性，其中的介词或副词不可省略。
It is said that the problem has been looked into.
据说这个问题已经被调查过了。
4.不及物动词或词组无被动语态
Great changes have taken place since 1978.
1978年以来发生了很大的变化。
5.带有双宾语的动词，如give，send，bring，take，teach，show，tell，make，sing，write，read，sell，buy，tell，pay，lend，pass，promise等，变为被动语态时，可将其中一个宾语变为主语，另一个保留不动。
We have given him a lot of cash.
→He has been given a lot of cash.
→A lot of cash has been given to him.
我们给了他很多现金。
6.带有复合宾语的动词变为被动语态时，只能将宾语变为主语，原来的宾补改为主语补足语。原来省略to的不定式作宾补的，被动语态中要用带to的不定式。
I have told them to take their identity cards.
→They have been told to take their identity cards.
我已经告诉他们要带上身份证。
The boss has made us work hard in order to finish the project on time.
→We have been made to work hard by our boss in order to finish the project on time.
老板让我们努力工作，以便按时完成这个项目。
返 回
达标检测
根据以下信息完成下面的短文
1.在过去的几十年里，互联网得到了很大的改善。
2.迄今为止，很多新软件被开发出来并被应用于互联网。
3.很多功能也被添加到互联网中，这使人们的生活更方便。
4.很多搜索引擎也已经被开发出来，人们可以从大数据库中查找最新的信息。
5.互联网极大地改变了人们的生活。
The Internet 1. in the past decades.So far，a lot of new software 2. the Internet and many new functions 3. the Internet ，4._______
.In addition，many search engines 5. .As a result，people can look up the latest information from large databases.In conclusion，people’s lives 6._______
by the Internet.
返 回
has been greatly improved
has been developed and applied to
have been added to
which
has made people’s lives more convenient
have been developed
have
been greatly changed
Discovering Useful Structures—The present perfect passive voice
The Internet
Unit 3
语境 感悟
阅读以下短文，感知加颜色部分，完成下面的练习
Dreams of finding lost treasure almost came true recently.A new machine called “The Revealer” has been invented and it has been used to detect gold which has been buried in the ground.The machine was used in a cave near the seashore where—it is said—pirates used to hide gold.The pirates would often bury gold in the cave and then fail to collect it.Armed with the new machine，a search party went into the cave hoping to find buried treasure.The leader of the party was examining the soil near the entrance to the cave when the machine showed that there was gold under the ground.Very excited，the party dug a hole two feet deep.
They finally found a small gold coin which was almost worthless.The party then searched the whole cave thoroughly but did not find anything except an empty tin trunk.In spite of this，many people are confident that some valuable things have been revealed by “The Revealer”.
加颜色部分所使用的时态和语态是 ，其构成为：
。
自主发现
返 回
现在完成时的被动语态
have/has been＋过去分词
语法 精讲
现在完成时的被动语态表示到现在为止某事已经被完成或被做。
运用现在完成时的被动语态时应掌握以下几个方面：
一、现在完成时的被动语态的常用句式
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...？
He has been selected to take part in the sports meeting.
他已被选中参加这次运动会。
To Tom’s disappointment，his novel has not been published.
让汤姆失望的是，他的小说还没有被出版。
Has the date for the next meeting been decided
下次会议的日期已经确定了吗？
How many residents have been invited to the conference？
有多少居民受到了参会的邀请？
二、现在完成时的被动语态的用法
1.表示被动的动作在说话之前已经完成，强调过去的动作对现在造成的影响或产生的结果，通常与already，yet，never，recently等副词及时间状语so far，by now，up to/till now，since等连用。
The database has already been updated.
数据库已经被更新了。(现在可以使用新的数据库了)
2.表示一个被动的动作或状态从过去开始一直持续到现在，并可能继续持续下去，常与for或since等引出的时间状语(从句)连用，或用于由how long引出的句子中。
Financial problems of the company have been discussed for nearly two hours.
公司的财务问题已经被讨论了近两个小时了。(可能还会继续被讨论)
3.用在条件、时间状语从句中，表示从句动作先于主句动作完成。
You shouldn’t leave school before your homework has been finished.
在你的作业完成之前你不应该离开学校。
三、使用现在完成时的被动语态要注意以下六点问题
1.与一般过去时的被动语态的区别。一般过去时的被动语态所表示的动作或状态与现在的情况没有联系，而现在完成时的被动语态则强调与现在的情况有联系。
The park was opened to the public last year.
这个公园去年向公众开放。(说明动作发生于过去)
The park has been opened to the public.
这个公园已向公众开放。(说明动作发生于过去，但对现在有影响，即现在公园已经向公众开放了)
2.非延续性动词，如borrow，finish，begin，start，buy，marry，open，join等构成的现在完成时的被动语态不能与表示一段时间的状语连用。若要表达相应的意思，则要改换动词或时间状语。
The work was finished two weeks ago.
这项工作于两周前被完成。
The work has been finished.
这项工作已经被完成。
3.短语动词是一个不可分割的整体，在被动语态中要保持其完整性，其中的介词或副词不可省略。
It is said that the problem has been looked into.
据说这个问题已经被调查过了。
4.不及物动词或词组无被动语态
Great changes have taken place since 1978.
1978年以来发生了很大的变化。
5.带有双宾语的动词，如give，send，bring，take，teach，show，tell，make，sing，write，read，sell，buy，tell，pay，lend，pass，promise等，变为被动语态时，可将其中一个宾语变为主语，另一个保留不动。
We have given him a lot of cash.
→He has been given a lot of cash.
→A lot of cash has been given to him.
我们给了他很多现金。
6.带有复合宾语的动词变为被动语态时，只能将宾语变为主语，原来的宾补改为主语补足语。原来省略to的不定式作宾补的，被动语态中要用带to的不定式。
I have told them to take their identity cards.
→They have been told to take their identity cards.
我已经告诉他们要带上身份证。
The boss has made us work hard in order to finish the project on time.
→We have been made to work hard by our boss in order to finish the project on time.
老板让我们努力工作，以便按时完成这个项目。
返 回
达标检测
根据以下信息完成下面的短文
1.在过去的几十年里，互联网得到了很大的改善。
2.迄今为止，很多新软件被开发出来并被应用于互联网。
3.很多功能也被添加到互联网中，这使人们的生活更方便。
4.很多搜索引擎也已经被开发出来，人们可以从大数据库中查找最新的信息。
5.互联网极大地改变了人们的生活。
The Internet 1. in the past decades.So far，a lot of new software 2. the Internet and many new functions 3. the Internet ，4._______
.In addition，many search engines 5. .As a result，people can look up the latest information from large databases.In conclusion，people’s lives 6._______
by the Internet.
返 回
has been greatly improved
has been developed and applied to
have been added to
which
has made people’s lives more convenient
have been developed
have
been greatly changed