Unit 2 Wildlife Protection Discovering Useful Structures 课件（共32张)-高中英语人教版（2019）必修第二册
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| 名称 | Unit 2 Wildlife Protection Discovering Useful Structures 课件（共32张)-高中英语人教版（2019）必修第二册 |  | |
| 格式 | pptx | ||
| 文件大小 | 3.1MB | ||
| 资源类型 | 教案 | ||
| 版本资源 | 人教版（2019） | ||
| 科目 | 英语 | ||
| 更新时间 | 2025-05-29 09:31:24 | ||
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(共32张PPT)
Unit 2
Wildlife Protection
Discovering Useful Structures
1
Students will understand the structure and formation rules of the present continuous passive voice, and distinguish it from other tenses in passive forms.
2
Students will be able to correctly use the present progressive passive voice in context to describe ongoing actions received by the subject, and apply it accurately in writing and oral communication.
Learning Objectives
Teaching Focus
Master the structure and usage rules of the present continuous passive voice, and accurately apply it in various sentence patterns.
Teaching Challenges
Differentiate the present continuous passive voice from other tenses, especially when dealing with intransitive verbs and stative verbs that cannot be used in the passive form.
Teaching Focus and Teaching Challenges
Part 1
Lead-in
One day, a famous painting is stolen from the museum. The police are called immediately.
When the museum was checked, the security cameras were found to be broken. The guards were questioned, but no clues were given.
Lead-in
名画失窃案
聪明的你能否找出文中的被动语态？
一天，博物馆里的一幅名画被偷了。警察立刻被叫来。
当博物馆被检查时，监控摄像头被发现坏了。保安被询问，但没有给出任何线索。
Right now, the painting is being searched for all over the city. Many people are being interviewed by the police.
A week later, the painting was finally discovered in an old warehouse. It had been hidden there by a thief. Luckily, the artwork wasn’t damaged.
The thief was arrested, and the painting will be returned to the museum soon. Now, better security systems are being installed to prevent future thefts.
Lead-in
现在，全城都在搜寻这幅画。许多人正被警方询问。
一周后，这幅画终于在一座旧仓库里被找到。它被一个小偷藏在了那里。幸运的是，画作没有被损坏。
小偷被抓了，画作很快就会被归还给博物馆。现在，更好的安保系统正在被安装，以防再次被盗。
Part 2
The present continuous passive voice
主动语态与被动语态
主动句 被动句
三变 主语 被动句的 by + 宾语（可省略不必要信息）
宾语 主语
谓语动词 对应时态的 be + 过去分词
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 被动语态的核心功能
1. 当需要突出动作的对象（即主动语态中的宾语），而非执行动作的主体（主语）时，使用被动语态。
主动语态：The company will hire five new employees.
（强调 “公司” 执行招聘动作）
被动语态：Five new employees will be hired by the company. （强调 “新员工” 被招聘的结果）
被动语态的核心功能
2. 当不知道、没必要或不想明确说出动作执行者时，使用被动语态（省略 “by + 执行者”）。
主动语态：Someone stole my wallet.
有人偷了我的钱包。（执行者 “某人” 未知）
被动语态：My wallet was stolen.
我的钱包被偷了。（仅需说明 “钱包被偷” 的事实）
被动语态的核心功能
3. 当主动语态的主语过长或复杂时，改用被动语态可使句子结构更平衡。
主动语态：The committee that consists of ten experts will review the proposal.（主语 “委员会” 带复杂定语，冗长）
被动语态：The proposal will be reviewed by the committee that consists of ten experts.（主语 “提案” 简洁，宾语后置）
被动语态的核心功能
何时避免使用被动语态？
需明确动作执行者时：The chef prepared this dish.（强调 “厨师” 的贡献）
表达动作的主动性或生动性时：The cat chased the mouse.（主动语态更具画面感）
句子结构冗余时：避免过度使用被动导致语义拖沓（如 “The ball was kicked by John” 不如 “John kicked the ball” 简洁）。
African elephants are being hunted.
What is being done to help them
What measures are being taken to help them
Underline the present continuous passive voice in the sentences and discuss its function.
Hunters are hunting African elephants.
What are people doing to help them
What measures are people taking to help them
共性：现在进行时强调当前正在发生的行为。
差异：主动句明确主语，被动句隐去或弱化执行者。
Choose the suitable verb forms to complete the sentences.
I’m (working/being worked) at home today because my office is (painted/being painted).
The alarming report is (written/being written). It will be finished soon.
What part of the city is (attacked/being attacked) now
Right now, the deer are (watched/being watched) over by many volunteers.
Who is (hunting/being hunted) the kangaroos Where are they (hunted/being hunted)
It is reported that living spaces for wildlife are (reduced/being reduced) due to the cutting of trees.
Liu Tao would like to express his concern over the wetland in his hometown. Help him finish the passage with the present continuous passive voice of the verbs in brackets.
In the wetland of my hometown, there are many different kinds of animals, including wild birds, fish, snakes, insects and so on. When I was in primary school, I often went there with my friends to watch the birds and study them. That was an interesting place for all of us. But things have begun to change in recent years. Small birds _________________ (catch) with nets. Wild ducks _______________ (sell) at food markets. Fish and snakes ___________________ (kill) for food in restaurants. And even worse, the wetland ___________________ (destroy). Some parts __________________ (cover) with new houses. You can see rubbish everywhere. The wetland ____________________ (pollute) seriously every day. I am very worried about it. What can we do
is being polluted
are being caught
are being sold
are being killed
is being destroyed
are being covered
被动语态的时态 时态 结构
一般现在时 am/is/are + done
一般过去时 was/were + done
一般将来时 will be + done
现在进行时 am/is/are being + done
现在完成时 have/has been + done
过去进行时 was/were being + done
过去完成时 had been + done
过去将来时 would/should be + done
情态动词 can/must/may be + done
含义：表示现在或现阶段正在进行或发生的被动动作，强调主语是动作的承受着。
现在进行时的被动语态
现在进行时：am/is/are + V-ing
被动语态： be + done (V过去分词)
am/is/are + being + done + (by…)
表进行
表被动
现在进行时的被动语态：
结构
现在进行时的被动语态的不同形式
(1) 肯定形式：主语 + be(am/is/are) ＋ being ＋ done
The new library is being built by workers.
(2) 否定形式：主语 + be(am/is/are) ＋ not ＋ being ＋ done
The old bridge is not being demolished this week.
(3) 一般疑问形式：be(Am/Is/Are) ＋ 主语 ＋ being ＋ done ？
Are the letters being sent by email or post
(4) 特殊疑问句形式：特殊疑问词 + be(am/is/are) + 主语 + being + done ？
When is the wall being painted
现在进行时的被动语态的基本用法
① 表示正在进行的被动动作（说话时动作正在发生），句中常有now, right now, at the moment, at present 等时间状语。
The room is being cleaned by my sister.
房间正在被我姐姐打扫。
A new song is being sung on the stage.
舞台上正在演唱一首新歌。
现在进行时的被动语态的基本用法
② 表示现阶段正在进行的被动动作（说话时不一定在进行，而是近期一段时间内持续的动作）。
Many trees are being planted along the river this month.
这个月正在沿河种植许多树。
The project is being discussed by the team members recently.
最近团队成员正在讨论这个项目。
现在进行时的被动语态的基本用法
③ 有时可表示按计划或安排将要进行的一个被动动作，强调动作已被安排。
The party is being prepared by the students tomorrow.
学生们明天将准备这场派对。
Her birthday gift is being made by her father now.
她的生日礼物正在由她父亲制作中。
现在进行时的被动语态的基本用法
④ 与 always, constantly, frequently, forever 等频度副词连用时，可表示反复发生的习惯性被动行为，并通过语气传达赞扬、埋怨、厌烦等情感色彩。
The classroom is always being left messy by someone.
教室总是被某人弄得乱七八糟。
She is constantly being praised by teachers for her hard work.
她总是因努力学习被老师表扬。
注意
1. 现在进行时的被动语态不可用于静态动词，表示状态、所属或感官的静态动词（如 have, belong, know, seem, love 等）无被动语态，也不用于进行时态。
The house is being belonged to my family.（错误）
The house belongs to my family.（正确，表所属）
Her opinion is being seemed reasonable.（错误）
Her opinion seems reasonable.（正确，表感官）
注意
2. 现在进行时的被动语态必须使用及物动词（直接接宾语的动词）的过去分词，而常见不及物动词（如 arrive, happen, die, exist, occur）无被动形式。
The train is being arrived at 8 PM.
The train will arrive at 8 PM.
An accident was being happened yesterday.
An accident occurred yesterday.
注意
3. 现在进行时的被动语态中，频度副词需置于 be 动词之后、being 之前，不可直接放在 being 后。另外，需注意，never 虽非频度副词，但用法类似，需置于 be 动词后。
The room is always being cleaned by her.
The room is being always cleaned by her.
The problem is never being solved.
The problem is being never solved.
注意
4. 当 "动词 + 介词" 构成的短语（如 look after, talk about, think of , take care of等）用于现在进行时的被动语态时，介词必须保留，不可省略。
结构：主语 + am/is/are + being + 动词过去分词 + 介词 + 宾语
主动语态：She is taking care of the baby.
被动语态：The baby is being taken care of (by her). （of 不可省略）
注意
5. 现在进行时的被动语态与其他时态被动语态的区别
时态 被动结构 时间含义 典型使用场景 例句对比
现在进行时被动 am/is/are + being + 过去分词 动作此刻正在被做（未完成） 强调当前正在进行的被动动作 The car is being washed now.
一般现在时被动 am/is/are + 过去分词 常态或习惯性被动 客观事实、普遍真理 The office is cleaned daily.
一般过去时被动 was/were + 过去分词 过去已完成的被动 描述过去发生的被动事件 The window was broken yesterday.
现在完成时被动 have/has been + 过去分词 已完成且影响现在 强调结果或持续状态 The report has been submitted.
过去进行时被动 was/were + being + 过去分词 过去某一刻正进行的被动 过去特定时刻的被动动作 The meal was being cooked when she called.
一般将来时被动 will be + 过去分词 将来会被做的动作 预测或计划中的被动动作 The project will be finished next week.
Part 3
Exercise
The new library ______ ______ ______ (build) by the famous architect.
Questions ______ ______ _________ (answer) by the teacher right now.
Why ______ the cake ______ __________ (decorate) by your sister
The documents ______ ______ _________ (prepare) for the meeting at the moment.
Mistakes ______ ______ ______ _________(not correct) during the exam.
The problem ______ ______ __________ (discuss) constantly by the team.
A surprise party ______ ______ ___________ (organize) for her birthday.
Why ______ the house ______ __________ (paint) again It looks fine.
is being built
are being answered
is being decorated
are being prepared
are not being corrected
is being discussed
is being organized
is being painted
判断下列主动语态能否转换为被动语态，若能，则填写在横线上
1. The book belongs to me.
2. An accident is happening.
3. They are constantly changing rules.
4. They are looking after the children.
5. The teacher is giving us homework.
The children are being looked after.
Rules are constantly being changed.
Homework is being given to us. 或 We are being given homework.
Homework
1. Summarise what we have learnt in this lesson;
2. Prepare for the next lesson
See you next time!
Unit 2
Wildlife Protection
Discovering Useful Structures
1
Students will understand the structure and formation rules of the present continuous passive voice, and distinguish it from other tenses in passive forms.
2
Students will be able to correctly use the present progressive passive voice in context to describe ongoing actions received by the subject, and apply it accurately in writing and oral communication.
Learning Objectives
Teaching Focus
Master the structure and usage rules of the present continuous passive voice, and accurately apply it in various sentence patterns.
Teaching Challenges
Differentiate the present continuous passive voice from other tenses, especially when dealing with intransitive verbs and stative verbs that cannot be used in the passive form.
Teaching Focus and Teaching Challenges
Part 1
Lead-in
One day, a famous painting is stolen from the museum. The police are called immediately.
When the museum was checked, the security cameras were found to be broken. The guards were questioned, but no clues were given.
Lead-in
名画失窃案
聪明的你能否找出文中的被动语态？
一天，博物馆里的一幅名画被偷了。警察立刻被叫来。
当博物馆被检查时，监控摄像头被发现坏了。保安被询问，但没有给出任何线索。
Right now, the painting is being searched for all over the city. Many people are being interviewed by the police.
A week later, the painting was finally discovered in an old warehouse. It had been hidden there by a thief. Luckily, the artwork wasn’t damaged.
The thief was arrested, and the painting will be returned to the museum soon. Now, better security systems are being installed to prevent future thefts.
Lead-in
现在，全城都在搜寻这幅画。许多人正被警方询问。
一周后，这幅画终于在一座旧仓库里被找到。它被一个小偷藏在了那里。幸运的是，画作没有被损坏。
小偷被抓了，画作很快就会被归还给博物馆。现在，更好的安保系统正在被安装，以防再次被盗。
Part 2
The present continuous passive voice
主动语态与被动语态
主动句 被动句
三变 主语 被动句的 by + 宾语（可省略不必要信息）
宾语 主语
谓语动词 对应时态的 be + 过去分词
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 被动语态的核心功能
1. 当需要突出动作的对象（即主动语态中的宾语），而非执行动作的主体（主语）时，使用被动语态。
主动语态：The company will hire five new employees.
（强调 “公司” 执行招聘动作）
被动语态：Five new employees will be hired by the company. （强调 “新员工” 被招聘的结果）
被动语态的核心功能
2. 当不知道、没必要或不想明确说出动作执行者时，使用被动语态（省略 “by + 执行者”）。
主动语态：Someone stole my wallet.
有人偷了我的钱包。（执行者 “某人” 未知）
被动语态：My wallet was stolen.
我的钱包被偷了。（仅需说明 “钱包被偷” 的事实）
被动语态的核心功能
3. 当主动语态的主语过长或复杂时，改用被动语态可使句子结构更平衡。
主动语态：The committee that consists of ten experts will review the proposal.（主语 “委员会” 带复杂定语，冗长）
被动语态：The proposal will be reviewed by the committee that consists of ten experts.（主语 “提案” 简洁，宾语后置）
被动语态的核心功能
何时避免使用被动语态？
需明确动作执行者时：The chef prepared this dish.（强调 “厨师” 的贡献）
表达动作的主动性或生动性时：The cat chased the mouse.（主动语态更具画面感）
句子结构冗余时：避免过度使用被动导致语义拖沓（如 “The ball was kicked by John” 不如 “John kicked the ball” 简洁）。
African elephants are being hunted.
What is being done to help them
What measures are being taken to help them
Underline the present continuous passive voice in the sentences and discuss its function.
Hunters are hunting African elephants.
What are people doing to help them
What measures are people taking to help them
共性：现在进行时强调当前正在发生的行为。
差异：主动句明确主语，被动句隐去或弱化执行者。
Choose the suitable verb forms to complete the sentences.
I’m (working/being worked) at home today because my office is (painted/being painted).
The alarming report is (written/being written). It will be finished soon.
What part of the city is (attacked/being attacked) now
Right now, the deer are (watched/being watched) over by many volunteers.
Who is (hunting/being hunted) the kangaroos Where are they (hunted/being hunted)
It is reported that living spaces for wildlife are (reduced/being reduced) due to the cutting of trees.
Liu Tao would like to express his concern over the wetland in his hometown. Help him finish the passage with the present continuous passive voice of the verbs in brackets.
In the wetland of my hometown, there are many different kinds of animals, including wild birds, fish, snakes, insects and so on. When I was in primary school, I often went there with my friends to watch the birds and study them. That was an interesting place for all of us. But things have begun to change in recent years. Small birds _________________ (catch) with nets. Wild ducks _______________ (sell) at food markets. Fish and snakes ___________________ (kill) for food in restaurants. And even worse, the wetland ___________________ (destroy). Some parts __________________ (cover) with new houses. You can see rubbish everywhere. The wetland ____________________ (pollute) seriously every day. I am very worried about it. What can we do
is being polluted
are being caught
are being sold
are being killed
is being destroyed
are being covered
被动语态的时态 时态 结构
一般现在时 am/is/are + done
一般过去时 was/were + done
一般将来时 will be + done
现在进行时 am/is/are being + done
现在完成时 have/has been + done
过去进行时 was/were being + done
过去完成时 had been + done
过去将来时 would/should be + done
情态动词 can/must/may be + done
含义：表示现在或现阶段正在进行或发生的被动动作，强调主语是动作的承受着。
现在进行时的被动语态
现在进行时：am/is/are + V-ing
被动语态： be + done (V过去分词)
am/is/are + being + done + (by…)
表进行
表被动
现在进行时的被动语态：
结构
现在进行时的被动语态的不同形式
(1) 肯定形式：主语 + be(am/is/are) ＋ being ＋ done
The new library is being built by workers.
(2) 否定形式：主语 + be(am/is/are) ＋ not ＋ being ＋ done
The old bridge is not being demolished this week.
(3) 一般疑问形式：be(Am/Is/Are) ＋ 主语 ＋ being ＋ done ？
Are the letters being sent by email or post
(4) 特殊疑问句形式：特殊疑问词 + be(am/is/are) + 主语 + being + done ？
When is the wall being painted
现在进行时的被动语态的基本用法
① 表示正在进行的被动动作（说话时动作正在发生），句中常有now, right now, at the moment, at present 等时间状语。
The room is being cleaned by my sister.
房间正在被我姐姐打扫。
A new song is being sung on the stage.
舞台上正在演唱一首新歌。
现在进行时的被动语态的基本用法
② 表示现阶段正在进行的被动动作（说话时不一定在进行，而是近期一段时间内持续的动作）。
Many trees are being planted along the river this month.
这个月正在沿河种植许多树。
The project is being discussed by the team members recently.
最近团队成员正在讨论这个项目。
现在进行时的被动语态的基本用法
③ 有时可表示按计划或安排将要进行的一个被动动作，强调动作已被安排。
The party is being prepared by the students tomorrow.
学生们明天将准备这场派对。
Her birthday gift is being made by her father now.
她的生日礼物正在由她父亲制作中。
现在进行时的被动语态的基本用法
④ 与 always, constantly, frequently, forever 等频度副词连用时，可表示反复发生的习惯性被动行为，并通过语气传达赞扬、埋怨、厌烦等情感色彩。
The classroom is always being left messy by someone.
教室总是被某人弄得乱七八糟。
She is constantly being praised by teachers for her hard work.
她总是因努力学习被老师表扬。
注意
1. 现在进行时的被动语态不可用于静态动词，表示状态、所属或感官的静态动词（如 have, belong, know, seem, love 等）无被动语态，也不用于进行时态。
The house is being belonged to my family.（错误）
The house belongs to my family.（正确，表所属）
Her opinion is being seemed reasonable.（错误）
Her opinion seems reasonable.（正确，表感官）
注意
2. 现在进行时的被动语态必须使用及物动词（直接接宾语的动词）的过去分词，而常见不及物动词（如 arrive, happen, die, exist, occur）无被动形式。
The train is being arrived at 8 PM.
The train will arrive at 8 PM.
An accident was being happened yesterday.
An accident occurred yesterday.
注意
3. 现在进行时的被动语态中，频度副词需置于 be 动词之后、being 之前，不可直接放在 being 后。另外，需注意，never 虽非频度副词，但用法类似，需置于 be 动词后。
The room is always being cleaned by her.
The room is being always cleaned by her.
The problem is never being solved.
The problem is being never solved.
注意
4. 当 "动词 + 介词" 构成的短语（如 look after, talk about, think of , take care of等）用于现在进行时的被动语态时，介词必须保留，不可省略。
结构：主语 + am/is/are + being + 动词过去分词 + 介词 + 宾语
主动语态：She is taking care of the baby.
被动语态：The baby is being taken care of (by her). （of 不可省略）
注意
5. 现在进行时的被动语态与其他时态被动语态的区别
时态 被动结构 时间含义 典型使用场景 例句对比
现在进行时被动 am/is/are + being + 过去分词 动作此刻正在被做（未完成） 强调当前正在进行的被动动作 The car is being washed now.
一般现在时被动 am/is/are + 过去分词 常态或习惯性被动 客观事实、普遍真理 The office is cleaned daily.
一般过去时被动 was/were + 过去分词 过去已完成的被动 描述过去发生的被动事件 The window was broken yesterday.
现在完成时被动 have/has been + 过去分词 已完成且影响现在 强调结果或持续状态 The report has been submitted.
过去进行时被动 was/were + being + 过去分词 过去某一刻正进行的被动 过去特定时刻的被动动作 The meal was being cooked when she called.
一般将来时被动 will be + 过去分词 将来会被做的动作 预测或计划中的被动动作 The project will be finished next week.
Part 3
Exercise
The new library ______ ______ ______ (build) by the famous architect.
Questions ______ ______ _________ (answer) by the teacher right now.
Why ______ the cake ______ __________ (decorate) by your sister
The documents ______ ______ _________ (prepare) for the meeting at the moment.
Mistakes ______ ______ ______ _________(not correct) during the exam.
The problem ______ ______ __________ (discuss) constantly by the team.
A surprise party ______ ______ ___________ (organize) for her birthday.
Why ______ the house ______ __________ (paint) again It looks fine.
is being built
are being answered
is being decorated
are being prepared
are not being corrected
is being discussed
is being organized
is being painted
判断下列主动语态能否转换为被动语态，若能，则填写在横线上
1. The book belongs to me.
2. An accident is happening.
3. They are constantly changing rules.
4. They are looking after the children.
5. The teacher is giving us homework.
The children are being looked after.
Rules are constantly being changed.
Homework is being given to us. 或 We are being given homework.
Homework
1. Summarise what we have learnt in this lesson;
2. Prepare for the next lesson
See you next time!