被动语态到底是什么
英语被动语态（Passive Voice）并不只是一个“be + 过去分词”的公式。真正需要掌握的是：句子想强调谁、主动句怎样转换、时态怎样保留，以及特殊结构中哪些地方会发生变化。
主动语态强调动作的执行者。例如：Tom cleaned the room. 句子的重点是Tom做了什么，结构为“主语 + 动词 + 宾语”。被动语态则把承受动作的对象放到前面：The room was cleaned by Tom. 重点转为房间发生了什么。
- 主动语态：谁做了某件事，例如 Tom opened the door.
- 被动语态：某个对象被怎样处理，例如 The door was opened by Tom.
- 关注点变化：主动句关注执行者，被动句关注动作对象、结果或过程。
过去分词不是过去式
公式里的done只是“过去分词”的代称，并不是每个句子都使用do的过去分词。规则动词的过去式和过去分词通常相同，不规则动词则需要单独掌握。
- make → made → made：The car was made in Japan.
- build → built → built：The bridge was built in 1990.
- write → wrote → written：The book was written by George Orwell.
- eat → ate → eaten：The food has been eaten.
- buy → bought → bought：A computer was bought for me.
- clean → cleaned → cleaned：The room was cleaned.
- break → broke → broken：The window was broken.
- steal → stole → stolen：My phone was stolen.
因此不能说 The car was make in Japan.，也不能说 The book was wrote by him.。be后面必须使用made、written、stolen这类过去分词形式。
什么时候适合使用被动语态
不知道动作是谁做的
My bike was stolen. 比 Someone stole my bike. 更自然，因为说话人并不知道是谁偷的，someone也没有提供有效信息。
执行者不重要或大家都知道
English is spoken in many countries. 强调英语的使用范围，不需要说明具体是谁在说。He was arrested yesterday. 通常也不必加by the police，因为执行逮捕的人很容易从常识中判断。
动作结果比执行者重要
新闻里的 Three people were injured in the accident. 关注三人受伤这一结果，而不是谁造成了伤害。产品状态、工程进度和通知信息也经常使用同样的表达方式。
正式文章、新闻、说明书和学术写作
The experiment was conducted in 2025. 把重点放在实验本身。正式文本常常更关心方法、数据和结果，而不是反复出现we或研究人员的姓名。
主动句变被动句的五个步骤
以 Tom cleans the room. 为例，可以按固定顺序转换，不需要凭感觉猜。
- 第一步——找到宾语：Tom / cleans / the room中，the room是宾语。
- 第二步——把宾语放到句首：新的主语变成The room。
- 第三步——判断原句时态：cleans是一般现在时，因此选择am、is或are。
- 第四步——实义动词变过去分词：clean变为cleaned。
- 第五步——按需要添加执行者：The room is cleaned by Tom。执行者不重要时可省略by Tom。
用字母概括，主动句是 A + 动词 + B，被动句就是 B + be + 过去分词 + by A。例如：Tom opened the door. 变成 The door was opened by Tom.
七种常用时态的被动结构
一般现在时：am / is / are + 过去分词
- People speak English here. → English is spoken here.
- Workers make these cars in Japan. → These cars are made in Japan.
- cars是复数，因此使用are made，不能写成is made。
一般过去时：was / were + 过去分词
- Someone stole my phone. → My phone was stolen.
- They built this bridge in 1990. → This bridge was built in 1990.
- They built these houses in 2010. → These houses were built in 2010.
一般将来时：will be + 过去分词
They will finish the project next week. 变为 The project will be finished next week.。不能省略be，也不能在be后使用finish原形。
现在进行时：am / is / are being + 过去分词
- They are repairing the road. → The road is being repaired.
- Someone is cleaning my room. → My room is being cleaned.
- My room is cleaned every day. 表示日常规律；My room is being cleaned now. 表示此刻正在进行。
过去进行时：was / were being + 过去分词
- They were repairing the road. → The road was being repaired.
- The police were questioning him. → He was being questioned by the police.
现在完成时：have / has been + 过去分词
- They have finished the work. → The work has been finished.
- Someone has stolen my car. → My car has been stolen.
过去完成时：had been + 过去分词
They had finished the work before I arrived. 变为 The work had been finished before I arrived.，表示过去某个时间点之前已经完成。
用build看懂时态怎样保持不变
- 一般现在：They build houses here. → Houses are built here.
- 一般过去：They built the house last year. → The house was built last year.
- 一般将来：They will build a new hospital. → A new hospital will be built.
- 现在进行：They are building a new hospital. → A new hospital is being built.
- 现在完成：They have built a new hospital. → A new hospital has been built.
高频结构可以直接归纳为：is done、was done、will be done、is being done、has been done。先熟练掌握这五种，已经能够覆盖日常英语和大多数考试题目。
情态动词、否定句与疑问句
情态动词：情态动词 + be + 过去分词
- You can solve this problem. → This problem can be solved.
- You must finish the work today. → The work must be finished today.
- We should protect the environment. → The environment should be protected.
- They may cancel the meeting. → The meeting may be cancelled.
- could、might、have to等也遵循相同思路，核心仍是be + 过去分词。
否定句
普通被动句在be后面加not：The door was not opened.、This product is not made in Japan.。有情态动词时，否定放在情态动词后：The problem cannot be solved.
疑问句
- The car was stolen. → Was the car stolen?
- The products are made in China. → Are the products made in China?
- The work has been finished. → Has the work been finished?
- The problem can be solved. → Can the problem be solved?
by什么时候写，by和with有什么区别
被动语态后面并不一定要有by somebody。执行者未知、不重要或已经很明显时，通常直接省略。My bike was stolen. 比 My bike was stolen by someone. 更自然。
当执行者本身是重要信息时，才保留by。例如：Harry Potter was written by J.K. Rowling.，以及 The Mona Lisa was painted by Leonardo da Vinci.
- by + 执行者：The window was broken by Tom.
- with + 工具：The window was broken with a hammer.
- 两者同时出现：The window was broken by Tom with a hammer.
哪些动词不能正常变成被动语态
被动语态的基本前提是主动句有宾语。Tom opened the door. 中有宾语the door，所以可以转换。Tom arrived. 没有宾语，自然也没有对象可以移到句首。
- 常见不及物动词：arrive、happen、sleep、die、go、come、occur。
- 正确表达：The accident happened yesterday.
- 错误表达：Yesterday was happened the accident.
双宾语和宾语补足语的特殊变化
双宾语可以产生两种被动句
Tom gave me a book. 中，me和a book都是宾语，因此可以说 I was given a book by Tom.，也可以说 A book was given to me by Tom.
My father bought me a computer. 理论上可以变为 I was bought a computer by my father.，但更自然的表达通常是 A computer was bought for me by my father.
make somebody do变被动时要补回to
- 主动：My boss made me work overtime.
- 被动：I was made to work overtime.
- 主动：The teacher made him clean the classroom.
- 被动：He was made to clean the classroom.
主动结构make + 人 + 动词原形不带to，变成被动后必须使用to do。
see、hear、watch somebody do也要补回to
- Someone saw him enter the building. → He was seen to enter the building.
- People heard him shout. → He was heard to shout.
常见固定被动表达
有些结构虽然来源于被动语态，但日常使用中已经接近固定搭配，最好整体记忆，而不是逐字翻译。
- be born：I was born in China. 我出生在中国。
- be known for：Japan is known for its food. 日本以美食闻名。
- be interested in：I'm interested in technology. 我对科技感兴趣。
- be worried about：I'm worried about the exam. 我担心考试。
- be surprised by / at：I was surprised by the news. 这个消息让我很惊讶。
- be satisfied with：I'm satisfied with the result. 我对结果满意。
- be covered with：The mountain was covered with snow. 山被雪覆盖。
- be made of：The table is made of wood. 桌子由木头制成。
made of、made from、made in和made by
- be made of：原材料仍能看出来。The table is made of wood.
- be made from：材料经过明显加工。Wine is made from grapes.
- be made in：说明制造地点。This car was made in Japan.
- be made by：说明制造者。This car was made by Toyota.
get done和have something done
get + 过去分词：更口语化的被动
- He got fired. 他被解雇了。
- They got married. 他们结婚了。
- He got hurt. 他受伤了。
- My phone got stolen. 我的手机被偷了。
get done比be done更口语化，常带有某件事实际发生、甚至有些意外的感觉。My phone was stolen. 比较中性，My phone got stolen. 更像生活中的叙述。
have + 东西 + 过去分词：让别人代为处理
- I cut my hair. 通常表示自己剪头发。
- I had my hair cut. 表示找别人剪头发。
- I had my car repaired. 我找人把车修了。
- I need to have my phone fixed. 我需要找人修手机。
- I'm going to have my teeth checked. 我要去检查牙齿。
have something done不是普通的被动句，它强调安排别人提供服务或完成某项处理。
主动和被动怎样选择
Someone cleaned the room. 强调有人执行了动作；The room was cleaned. 强调房间已经得到清理。两句都正确，选择哪一种取决于想把什么放在信息中心。
被动语态并不是越多越高级。日常交流中，I sent you the email yesterday. 明显比 The email was sent to you by me yesterday. 更简洁自然。只有当对象、结果或过程更重要时，才有必要使用被动。
六类最常见错误
忘记be
错误：The car made in Japan. 正确：The car is made in Japan. 被动语态不是单独的过去分词，而是be + 过去分词。
把过去式当成过去分词
- 错误：The book was wrote by him. 正确：The book was written by him.
- 错误：My phone was stole. 正确：My phone was stolen.
be的时态与原句不一致
- They built this house in 2020. → This house was built in 2020.
- They will finish it tomorrow. → It will be finished tomorrow.
主谓不一致
- The car is made in Japan. / The cars are made in Japan.
- The house was built. / The houses were built.
进行时漏掉being
The road is repaired now. 不能准确表达“正在维修”。现在进行时被动应该是 The road is being repaired.
完成时漏掉been
如果想表达“工作已经被完成”，应该写 The work has been finished.，结构是have / has + been + 过去分词。
怎样快速判断一个句子是不是被动
看到be + 过去分词时，先判断它是否表达“主语承受动作”。例如 The door was opened. 中，door承受open这个动作，因此是典型被动。
但有些过去分词已经很像形容词。I'm interested in English. 更适合理解为“我对英语感兴趣”，而不是机械翻译成“我被英语使得感兴趣”。判断时既要看形式，也要看实际含义。
考试中的固定解题方法
题目为 The company produces thousands of cars every year. 时，可以按四步处理。
- 找SVO：主语The company，谓语produces，宾语thousands of cars。
- 宾语提前：Thousands of cars成为新主语。
- 判断时态和单复数：produces是一般现在时，cars是复数，所以使用are。
- 写过去分词：produce变为produced，得到Thousands of cars are produced every year。
如果执行者不重要，by the company可以省略。考试时始终按“找宾语—判时态—选be—写过去分词”的顺序检查。
主动变被动练习
- Someone broke the window. → The window was broken.
- They will announce the results tomorrow. → The results will be announced tomorrow.
- Someone is using my computer. → My computer is being used.
- They have cancelled the meeting. → The meeting has been cancelled.
- You must complete this form. → This form must be completed.
中文没有“被”字，英语仍可能是被动
不要依靠中文译文里有没有“被”来判断英文语态。This bridge was built in 1995. 自然翻译是“这座桥建于1995年”，而不是“这座桥在1995年被建造”。The shop is closed on Sundays. 通常翻译为“这家店星期天关门”。
英语关注的是语法结构和信息重点，中文翻译则会选择符合中文习惯的说法，两者不需要逐字对应。
生活中高频出现的被动表达
- Made in Japan. 日本制造。
- Smoking is prohibited. 禁止吸烟。
- Breakfast is served from 7:00 to 10:00. 早餐供应时间为7点到10点。
- Two people were injured. 两人受伤。
- Your application has been received. 您的申请已经收到。
- Your order has been shipped. 您的订单已经发货。
- Your password has been changed. 您的密码已经修改。
还可以整体熟悉be made、be built、be used、be called、be known、be written、be found、be created、be designed、be sold、be produced、be required、be allowed、be prohibited、be included、be cancelled、be delayed、be completed、be damaged、be stolen和be injured等常用组合。
最后用repair the car串起全部结构
- The car is repaired. 这辆车通常会被修理。
- The car was repaired yesterday. 这辆车昨天修过。
- The car will be repaired tomorrow. 这辆车明天会修。
- The car is being repaired. 这辆车正在维修。
- The car has been repaired. 这辆车已经修好了。
- The car was being repaired. 这辆车当时正在维修。
- The car had been repaired. 这辆车在那个时间之前已经修好。
- The car must be repaired. 这辆车必须修。
- The car can be repaired. 这辆车可以修。
- The car should be repaired. 这辆车应该修。