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英语语法被动语态总结一、被动语态的构成形式1. 被动语态的基本时态变化被动语态通常为十种时态的被动形式, 被动语态由be＋过去分词构成，be随时态的变化而变化。
以do为例，各种时态的被动语态形式为：1) am/is/are +done (过去分词) 一般现在时例Visitors are requested not to touch the exhibits.2）has /have been done 现在完成时例All the preparations for the task have been completed, and we're ready to start.3）am/is /are being done 现在进行时例 A new cinema is being built here．4）was/were done 一般过去时例I was given ten minutes to decide whether I should reject the offer.5）had been done 过去完成时例By the end of last year, another new gymnasium had been completed in Beijing.6）was/were being done 过去进行时例 A meeting was being held when I was there.7）shall/will be done 一般将来时例Hundreds of jobs will be lost if the factory closes.8）should/would be done 过去将来时例The news would be sent to the soldier's mother as soon as it arrived.9）shall/will have been done 将来完成时（少用）例Theproject will have been completed before July.2. 被动语态的特殊结构形式1)带情态动词的被动结构。
语法中的被动语态与完成被动语态被动语态是英语语法中的一项重要内容，它的应用范围非常广泛。
在本文中，我们将讨论被动语态的不同形式，特别是被动语态和完成被动语态之间的区别。
一、被动语态的基本形式被动语态的基本构成为：“be”动词（即am、is、are、was、were等）+ 过去分词。
例如：1. 主动语态：She writes a letter.被动语态：A letter is written by her.2. 主动语态：They are building the bridge.被动语态：The bridge is being built by them.在被动语态中，动作的执行者或者是不确定的，或者是不重要的。
被动语态通常用于以下情况：- 作者对被动语态更感兴趣；- 需要强调动作的接受者而非执行者；- 重复使用主语会导致重复或歧义的情况。
二、完成被动语态的基本形式完成被动语态是由助动词“have”（形式：have、has、had）加上过去分词来构成的。
它用于表示在过去某个时间点之前已经完成的动作。
例如：1. 主动语态：They have built the house.完成被动语态：The house has been built by them.2. 主动语态：He had finished the project by yesterday.完成被动语态：The project had been finished by him by yesterday.完成被动语态强调的是已经完成的动作，它通常用于以下情况：- 表示过去某个时间点之前已经完成的动作；- 强调过去完成的动作的结果。
三、被动语态与完成被动语态的区别被动语态和完成被动语态之间的主要区别在于时间和动作的完成程度。
1. 时间：被动语态通常使用一般现在时，而完成被动语态则使用各种过去时态（如一般过去时、过去完成时等）。
2. 动作的完成程度：被动语态只表示动作的被动，而完成被动语态则强调动作的完成。
被动语态语法知识点总结一、被动语态的基本结构被动语态是英语中的一种语法结构，通过将动作的承受者置于句子的主语位置，强调动作的接受者而非执行者。
被动语态的基本结构为：be动词（am, is, are, was, were）+过去分词。
例如：Active voice（主动语态）：The dog chased the cat.（狗追赶着猫。
）Passive voice（被动语态）：The cat was chased by the dog.（猫被狗追赶。
）二、被动语态的用法1. 强调动作的承受者：被动语态可以将动作的承受者放在句子的主语位置，使其成为句子的焦点。
例如：Active voice: He wrote a book.（他写了一本书。
）Passive voice: A book was written by him.（一本书被他写了。
）2. 隐藏执行者：有时候，句子的执行者并不重要或显而易见，这时可以使用被动语态来隐藏执行者。
例如：Active voice: They built this house.（他们建造了这座房子。
）Passive voice: This house was built by them.（这座房子被他们建造了。
）3. 表示客观事实：被动语态常用于描述客观事实或一般真理。
例如：Active voice: People speak English all over the world.（全世界人们讲英语。
）Passive voice: English is spoken all over the world.（英语在全世界都被讲。
）4. 句子的主语是动作的承受者：当动作的承受者比执行者更重要时，可以使用被动语态将其放在句子的主语位置。
例如：Active voice: The car hit the tree.（汽车撞到了树。
）Passive voice: The tree was hit by the car.（树被汽车撞到了。
被动语态英语被动语态的句子是以《be动词+过去分词》的形式来表达，如果要特别强调动作或行为的执行者时，句子后面需接by～，译为“被（由）……”。
1 被动语态的句型肯定句：主语+be +过去分词+（by～）.否定句：主语+be not +过去分词+（by～）.一般疑问句：Be +主语+过去分词+（by～）？特殊疑问句：疑问词+be +主语+过去分词+（by～）？被动语态的时态是由be的时态决定的，be是什么时态，全句就是什么时态，be动词后面的过去分词不变。
一、被动语态的用法：1. 一般现在时的被动语态构成：is / am / are + 及物动词的过去分词Our classroom is cleaned everyday.I am asked to study hard.Knives are used for cutting things.2. 一般过去时的被动语态构成：was / were + 及物动词的过去分词A new shop was built last year.Dinosaur eggs were laid long long ago.3. 一般将来时的被动语态构成：will+ be + 及物动词的过去分词A new hospital will be built in our city.Many more trees will be planted next year.4. 现在进行时的被动语态构成：am / is / are + being + 及物动词的过去分词Uncle Wang is mending my bike now.→My bike is being repaired by Tom now.They are planting trees over there. →Trees are being planted over there by them.5. 现在完成时的被动语态构成：has / have + been + 及物动词的过去分词This book has been translated into many languages.Many man-made satellites have been sent up into space by many countries.6.过去进行时的被动语态构成：was/were + being + 及物动词的过去分词The boy was being operated on when his parents hurried to the hospital.The new road was being made.*过去将来时：should/would+及物动词的过去分词*过去将来完成时: should/would+have been +及物动词的过去分词7.过去完成时的被动语态构成：had + been + 及物动词的过去分词The classroom hadn’t been cleaned before the teacher came.The tickets had been sold out berore I came to the cinema.8.将来完成时的被动语态构成：shall/will + have doneThey will have been married for 20 years by then.The project will have been completed before May.9.含有情态动词的被动语态构成：情态动词+ be + 及物动词的过去分词Young trees must be watered often.Your mistakes should be corrected right now.The door may be locked inside.Your homework can be handed in tomorrow.二、怎样把主动语态改成被动语态?把主动语态改为被动语态非常简单，可以遵循以下几个步骤：1. 先找出谓语动词；2. 再找出谓语动词后的宾语；3. 把宾语用作被动语态中的主语；4. 注意人称、时态和数的变化。
高中英语语法---被动语态语态也是动词的一种形式，表示主语与谓语之间的关系。
英语有两种语态：主动语态和被动语态。
主动语态表示主语是谓语动作的执行者，如：People grew rice in this area some years ago.被动语态表示主语是谓语动作的承受者，如：A new swimming pool will be built on our school.一.被动语态的构成被动语态的形式是由“助动词be+动词的过去分词”构成。
助动词be随着主语的人称，数，时态和语气的不同而变化。
各种时态的被动语态形式如下：1.一般现在时am/is/are+V(p.p)人们利用电能运转机器。
People use electricity to run machines. Electricity is used to run machines.Is electricity used to run machines? Yes, it is . / No, it isn't.2.一般过去时was/were + V(p.p)昨天我们在山坡上种了许多树。
We planted many trees on the hill yesterday.Many trees were planted on the hill yesterday.Were many trees planted on the hill yesterday? Yes, they were. / No, they were not. 3.一般将来时will/shall +be+V(p.p)下星期我们将举行一场运动会。
We will hold a sports meeting next week.A sports meeting will be held next week.Will a sports meeting be held next week? Yes, it will. / No, it won't.4.过去将来时should/would +be+V(p.p)他告诉我们人们将在他家乡建一个大水坝。
被动语态的九种结构被动语态是英语中的一种语法结构，用于强调动作的承受者或对象，而不是执行者。
以下是被动语态的九种常见结构：1.一般现在时的被动语态：be + 过去分词例句：The letter is written by Tom.（这封信是汤姆写的。
）2.一般过去时的被动语态：was/were + 过去分词例句：The book was published last year.（这本书是去年出版的。
）3.一般将来时的被动语态：will be + 过去分词例句：The project will be completed by next month.（这个项目将在下个月完成。
）4.现在进行时的被动语态：am/is/are being + 过去分词例句：The house is being decorated by the workers.（这栋房子正在被工人们装饰。
）5.过去进行时的被动语态：was/were being + 过去分词例句：The car was being repaired when I arrived.（我到达时，汽车正在被修理。
）6.现在完成时的被动语态：has/have been + 过去分词例句：The movie has been watched by millions of people.（这部电影已经被数百万人观看过。
）7.过去完成时的被动语态：had been + 过去分词例句：The assignment had been submitted before the deadline.（作业已在截止日期之前提交。
）8.情态动词的被动语态：情态动词 + be + 过去分词例句：The proposal should be considered carefully.（这个提案应该被认真考虑。
）9.进行时的情态动词被动语态：情态动词 + be + being + 过去分词例句：The problem must be being discussed by the team.（这个问题一定正在团队中被讨论。
英语中的被动语态被动语态是英语语法中常用的一种语态形式。
它可以用来表达替换主语的被动语气，使得被动语态句子更加突出动作的接受者或者状态的承受者。
在英语中，被动语态是一种重要的语法结构，对于学习英语的人来说，掌握被动语态的用法非常重要。
一、被动语态的定义及构成方式被动语态是通过在动词前加上助动词“be”的过去分词形式来构成的。
这里的助动词的种类包括“am, are, is, was, were, have(或has), had, will”，并且根据时态的不同将其进行了变化。
例如：一般现在时： am/are/is + 过去分词过去时： was/were + 过去分词现在完成时： have/has + 过去分词将来时： will + be + 过去分词构成被动语态的方式可以用一个简单的公式来表示，即：主语+ 助动词 + 过去分词。
例如：主动： The boy hit the ball.（男孩打了球。
）被动： The ball was hit by the boy.（球被男孩打了。
）二、被动语态的用途1、突出动作的承受者或者状态的承受者被动语态的最主要的用途就是通过替换主语来打出动作的承受者或状态的承受者的差异。
例如：主动： My father bought a new car yesterday.（我爸爸昨天买了一辆新车。
）被动： A new car was bought by my father yesterday.（昨天一辆新车被我爸爸买了。
）2、避免使用主语如果某些情况下，使用主语会使得句子过于重复或者语法不对，那就可以使用被动语态来代替主语。
例如：主动： People say that he is the best student in our school.（人们说他是我们学校最好的学生。
）被动： It is said that he is the best student in our school.（据说他是我们学校最好的学生。
英语语法：被动语态用法大全英语语法：被动语态用法大全概念语态(Voice)是动词的一种形式，用以表示主语和谓语之间的关系。
英语的语态包括两种形式：主动语态(active voice)和被动语态(passive voice)。
主动语态表示主语是动作的执行者，被动语态表示主语是动作的承受者。
被动语态是动词的一种特殊形式，一般来说，只有需要动作对象的及物动词才有被动语态。
主动语态表示主语是动作的执行者。
巧记为：主动、主动、主去动。
Many people speak English.谓语：speak的动作是由主语many people来执行的。
被动语态表示主语是动作的承受者，即行为动作的对象。
巧记为：被动、被动、主被动。
English is spoken by many people.主语English是动词speak的承受者。
He opened the door.他开了门。
(主动句)The door was opened.门被开了。
(被动句)构成His bicycle was stolen.The building has been built in 2000.通过上面的例句，可以看出，“被动语态”的构成是：be + 过去分词 ( + by + 动作执行者) 形式被动语态由助动词be加及物动词的过去分词构成，强调动作是由什么人或什么东西而发出时，常用介词“by +行为发出者”，即be+done+by+行为发出者。
被动语态可用于各种时态，通过助动词be的变化来表示：1、一般现在时的被动语态. am / is / are + 动词的过去分词Our classroomis cleaned every day.This car is made in China.2、一般过去式的被动语态: was / were + 动词的过去分词His desk was cleaned just now.The station was built in 1928.3、现在进行时的被动语态: am / is / are + being + 动词的过去分词A new factory is being built in our city now.Some trees are being cut down in the park.4、过去进行时的被动语态: was / were + being + 动词的过去分词A new factory was being built in our city at that time.Some babies were being looked after by Miss Chen last year.5、一般将来时的被动语态:(A) will / shall + be + 动词的过去分词(B) am / is / are + going to be +动词的过去分词.Some new factories will be built in our city this year.Your watch is going to be mended in an hour.6、过去将来时的被动语态:(1)would / should + be + 动词的过去分词(2)was / were +going to be + 动词的过去分词.She said that some new factories would be built soon in our city.He thought that your watch was going to be mended after an hour.7、现在完成时的被动语态:have / has + been + 动词的过去分词Some new factories have been built in the city since last year.Your watch has been mended already.8、过去完成时的被动语态:had + been + 动词的过去分词He said that some new factories had been built in the city.I didnt know that my watch had been mended .9、含情态动词的被动式：can/may/must + be + done(1)You must hand in your homework after class.Your homework must be handed in after class.(2)He can write a letter with the computer.A letter can be written with the computer by him.初中英语八大时态一般现在时一般过去时一般将来时现在进行时过去进行时过去将来时现在完成时过去进行时运用第一种情况：不知道动作的执行者，就是不知道谁干的Dan's bike was stolen last week. 丹的自行车上周被偷了。
参阅《张道真实用英语语法》一、常见被动语态He was brought up by her aunt. 他是他姑姑带大的。
I am given a lot of work to do. 他们给了我大量工作。
The spacecraft will be launched tomorrow. 太空船将于明天发射。
The case is being investigated. 这案子正在调查之中。
He was being looked after by his sister. 他正由他妹妹照顾着。
My brother has been sent to work in Tibet. 我弟弟被派去西藏工作了。
He told me that the factory had been closed down. 他告诉我这家工厂已经倒闭。
二、带情态动词的被动语态You might be asked to speak at the meeting. 可能会请你在会上发言。
This must be considered carefully. 这事必须仔细考虑。
Such expenses could have been avoided. 这些开支本来是可以避免的。
三、非谓语动词的被动语态It's a privilege to be allowed to study here. 获准在这里学习是难得的荣幸。
He begged to be forgiven. 他请求宽恕。
I'd like this room to be redecorated. 我想让这个房间重新装饰一下。
His dream was to be admitted to a good university. 他的梦想是获准进入一所好大学。
She was invited to a garden party to be held that night. 她被邀请参加那天晚上举行的游园会。
英语语法被动语态知识点梳理在英语语法中，被动语态是一个重要且常用的语法点。
理解和掌握被动语态对于准确、流畅地表达意思以及提高英语语言能力都有着至关重要的作用。
下面咱们就来详细梳理一下被动语态的相关知识。
一、被动语态的构成被动语态的基本构成是“be ＋过去分词”。
其中，“be”动词要根据不同的时态和主语进行变化，过去分词则保持不变。
比如，一般现在时的被动语态是“am/is/are ＋过去分词”，一般过去时是“was/were ＋过去分词”，现在进行时是“am/is/are ＋ being ＋过去分词”，过去进行时是“was/were ＋ being ＋过去分词”，现在完成时是“have/has ＋ been ＋过去分词”，过去完成时是“had ＋ been ＋过去分词”等等。
举几个例子帮助大家理解：“ The book is written by him ”（一般现在时的被动语态）“ The tree was cut down yesterday ”（一般过去时的被动语态）“ The problem is being discussed now ”（现在进行时的被动语态）“ The work had been finished before he came ”（过去完成时的被动语态）二、被动语态的使用场景1、不知道或没必要指出动作的执行者当我们关注的是动作本身而不是执行者时，就会使用被动语态。
例如：“The window was broken ”（不知道是谁打破了窗户）2、强调动作的承受者为了突出动作的承受者，会使用被动语态。
比如：“This song is loved by many people ”（强调很多人喜欢这首歌，而不是强调谁让很多人喜欢这首歌）3、出于礼貌或委婉在某些情况下，使用被动语态可以使表达更委婉、更礼貌。
比如：“It is suggested that you should come earlier ”（用被动语态比直接说“ We suggest that you should come earlier ”更委婉）三、主动语态变被动语态的方法1、把主动语态中的宾语变成被动语态的主语。
被动语态一、被动语态在各种时态中的结构一般现在时：be done（be随人称变化）一般过去时：was/were done一般将来时：will be done现在进行时：be being done（前面的be随人称变化，后面的being固定）过去进行时：was/were being done（being固定）现在完成时：have/has been done过去完成时：had been done过去将来时：would be done将来完成时：will have been done将来进行时：will be being done（being固定）将来完成进行时：will have been being done现在完成进行时：have been being done过去将来完成时：would have been done过去完成进行时：had been being done过去将来进行时：would be being done过去将来完成进行时：would have been being done二、被动语态的基本用法：被动语态表示一种主语和谓语之间的关系，当主语是动作的承受者时，就需要用到被动语态，汉语中所说的，“汽车被撞坏了”“钢笔被修好了” 等句子就是一种被动语态的句子，在汉语中常用“被”“由”等词来表示这种被动语态。
在英语中则用动词的被动语态形式来表示。
被动语态中还可用by 短语加在句后表示被动语态中动作的发出者。
也就是谓语动词动作的逻辑上的主语，被动语态常用在下列情况。
1、不知道谁是谓语动词动作的执行者时，或者没有必要说出谁是执行者时。
The glass was broken last night. 玻璃昨天被打破了。
His bike has been stolen. 他的自行车被偷了。
He was asked to go there once more. 他被要求再去那儿一次。
2、为了强调或突出动作的承受者时。
英语语法：被动语态用法大全英语语法中的被动语态是我们常常用到的一种语句结构，下面就是我给大家带来的英语语法：被动语态用法大全，盼望能关心到大家!英语语法：被动语态用法大全概念语态(Voice)是动词的一种形式，用以表示主语和谓语之间的关系。
英语的语态包括两种形式：主动语态(active voice)和被动语态(passive voice)。
主动语态表示主语是动作的执行者，被动语态表示主语是动作的承受者。
被动语态是动词的一种特别形式，一般来说，只有需要动作对象的及物动词才有被动语态。
主动语态表示主语是动作的执行者。
巧记为：主动、主动、主去动。
Many people speak English.谓语：speak的动作是由主语many people 来执行的。
被动语态表示主语是动作的承受者，即行为动作的对象。
巧记为：被动、被动、主被动。
English is spoken by many people.主语English是动词speak的承受者。
He opened the door.他开了门。
(主动句)The door was opened.门被开了。
(被动句)构成His bicycle was stolen.The building has been built in 2000.通过上面的例句，可以看出，“被动语态”的构成是：be + 过去分词 ( + by + 动作执行者)形式被动语态由助动词be加及物动词的过去分词构成，强调动作是由什么人或什么东西而发出时，常用介词“by +行为发出者”，即be+done+by+行为发出者。
被动语态可用于各种时态，通过助动词be的变化来表示：1、一般现在时的被动语态. am / is / are + 动词的过去分词Our classroom is cleaned every day.This car is made in China.2、一般过去式的被动语态: was / were + 动词的过去分词His desk was cleaned just now.The station was built in 1928.3、现在进行时的被动语态: am / is / are + being + 动词的过去分词A new factory is being built in our city now.Some trees are being cut down in the park.4、过去进行时的被动语态: was / were + being + 动词的过去分词A new factory was being built in our city at that time.Some babies were being looked after by Miss Chen last year.5、一般将来时的被动语态:(A) will / shall + be + 动词的过去分词(B) am / is / are + going to be +动词的过去分词.Some new factories will be built in our city this year.Your watch is going to be mended in an hour.6、过去将来时的被动语态:(1)would / should + be + 动词的过去分词(2)was / were +going to be + 动词的过去分词.She said that some new factories would be built soon in our city.He thought that your watch was going to be mended after an hour.7、现在完成时的被动语态:have / has + been + 动词的过去分词Some new factories have been built in the city since last year.Your watch has been mended already.8、过去完成时的被动语态:had + been + 动词的过去分词He said that some new factories had been built in the city.I didnt know that my watch had been mended .9、含情态动词的被动式：can/may/must + be + done(1)You must hand in your homework after class.Your homework must be handed in after class.(2)He can write a letter with the computer.A letter can be written with the computer by him.学校英语八大时态一般现在时一般过去时一般将来时现在进行时过去进行时过去将来时现在完成时过去进行时运用第一种状况：不知道动作的执行者，就是不知道谁干的Dans bike was stolen last week. 丹的自行车上周被偷了。
被动语态一、什么是被动语态？英语中时态很多，但语态不多，只有两种,即：主动语态和被动语态。
所谓“被动语态”,相当于中文中常说的“被……”、“由……”的句式，如：“他的自行车被偷了。
”，“这座楼房是由他们建造的.”二、动语态的运用(1）不知道谁是动作的执行者或没有必要。
例如：Paper is made from wood。
（纸是由木材生产出来的。
）The house is quite old。
It was built in 1950. （这座房子太旧了。
它是1950年建成的。
)He was wounded in the fight. （他在战斗在受伤了.）Electricity is used to run machines. （电是用来开动机器的。
）(2）需要强调动作的对象时。
例如:Calculator can't be used in the maths exam。
（计算器不能用于数学考试.）Books and newspapers in the reading room mustn’t be taken away. （阅览室的书籍和报纸不准带走。
）He was awarded first prize in that contest。
（他在比赛中获得了第一。
）（3）为了使语气婉转,避免提到是谁做的这件事。
例如：The construction of the new lab must be completed by the end of next month。
（新实验室必须在下个月底前完工.）三、各种时态的被动语态举例一般地讲，被动语态可用于英语的各种时态.被动语态的结构为“助动词be＋及物动词的过去分词(p．p）”。
被动语态的不同时态是通过be的时态变化来表示的，其人称和数方面应与主语保持一致。
其具体变化为：1、一般现在时的被动语态. am / is / are + 动词的过去分词Our classroom is cleaned every day.This car is made in China.2、一般过去式的被动语态: was / were + 动词的过去分词His desk was cleaned just now。
英语语法：被动语态用法大全英语语法中的被动语态是我们经常用到的一种语句结构，下面就是小编给大家带来的英语语法：被动语态用法大全，希望能帮助到大家!英语语法：被动语态用法大全概念语态(Voice)是动词的一种形式，用以表示主语和谓语之间的关系。
英语的语态包括两种形式：主动语态(active voice)和被动语态(passive voice)。
主动语态表示主语是动作的执行者，被动语态表示主语是动作的承受者。
被动语态是动词的一种特殊形式，一般来说，只有需要动作对象的及物动词才有被动语态。
主动语态表示主语是动作的执行者。
巧记为：主动、主动、主去动。
Many people speak English.谓语：speak的动作是由主语many people来执行的。
被动语态表示主语是动作的承受者，即行为动作的对象。
巧记为：被动、被动、主被动。
English is spoken by many people.主语English是动词speak的承受者。
He opened the door.他开了门。
(主动句)The door was opened.门被开了。
(被动句) 构成His bicycle was stolen.The building has been built in 2000.通过上面的例句，可以看出，被动语态的构成是：be + 过去分词( + by + 动作执行者)形式被动语态由助动词be加及物动词的过去分词构成，强调动作是由什么人或什么东西而发出时，常用介词by +行为发出者，即be+done+by+行为发出者。
被动语态可用于各种时态，通过助动词be的变化来表示：1、一般现在时的被动语态. am / is / are + 动词的过去分词Our classroom is cleaned every day.This car is made in China.2、一般过去式的被动语态: was / were + 动词的过去分词His desk was cleaned just now.The station was built in 1928.3、现在进行时的被动语态: am / is / are + being + 动词的过去分词A new factory is being built in our city now.Some trees are being cut down in the park.4、过去进行时的被动语态: was / were + being + 动词的过去分词 A new factory was being built in our city at that time.Some babies were being looked after by Miss Chen last year.5、一般将来时的被动语态:(A) will / shall + be + 动词的过去分词(B) am / is / are + going to be +动词的过去分词.Some new factories will be built in our city this year.Your watch is going tobe mended in an hour.6、过去将来时的被动语态:(1)would / should + be + 动词的过去分词(2)was / were +going to be + 动词的过去分词.She said that some new factories would be built soon in our city.He thought that your watch was going to be mended after an hour.7、现在完成时的被动语态:have / has + been + 动词的过去分词Some new factories have been built in the city since last year.Your watch has been mended already.8、过去完成时的被动语态:had + been + 动词的过去分词He said that some new factories had been built in the city.I didnt know that my watch had been mended .9、含情态动词的被动式：can/may/must + be + done(1)You must hand in your homework after class.Your homework must be handed in after class.(2)He can write a letter with the computer.A letter can be written with the computer by him. 初中英语八大时态一般现在时一般过去时一般将来时现在进行时过去进行时过去将来时现在完成时过去进行时运用第一种情况：不知道动作的执行者，就是不知道谁干的Dans bike was stolen last week. 丹的自行车上周被偷了。
