英语作文被动语态何时该用？

1. 什么是被动语态？ (定义与构成)
2. 为什么要用被动语态？ (核心功能与优势)
3. 什么时候应该用被动语态？ (适用场景)
4. 什么时候应该避免用被动语态？ (注意事项)
5. 在英语作文中的高分技巧与范例
6. 常见错误与练习

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什么是被动语态？

被动语态 的核心思想是：动作的承受者成为句子的主语，而动作的发出者（如果需要提及的话）则放在后面。

构成公式： be动词 + 动词的过去分词

时态	be动词形式
一般现在时	am, is, are
一般过去时	was, were
一般将来时	will be
现在完成时	have/has been
过去完成时	had been
情态动词	can/may/should be 等

主动语态 vs. 被动语态

主动语态	被动语态
Scientists discovered a new planet.	A new planet was discovered (by scientists).
The government is building a new hospital.	A new hospital is being built (by the government).
Someone has stolen my bike.	My bike has been stolen (by someone).

注意：

• 动词 have (有) 和 happen (发生) 等没有被动语态。
• 系动词如 be, seem, look, become 等也没有被动语态。

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为什么要用被动语态？(核心功能与优势)

1. 强调动作的承受者：当动作的承受者比发出者更重要或更引人关注时，使用被动语态可以将其置于句首，突出主题。

   • The Mona Lisa was painted by Leonardo da Vinci. (重点是《蒙娜丽莎》这幅画，而不是达芬奇。)
   • A new policy was introduced last week. (重点是“新政策”，而不是谁引入的。)

2. 保持客观性：在学术、科技、新闻报道等正式文体中，当动作的发出者不明确、不重要或不便透露时，使用被动语态可以避免主观色彩，显得更加客观、严谨。

   
   （图片来源网络，侵删）
   • It is believed that the ancient Egyptians built the pyramids. (避免了说 "We believe..." 或 "Someone believes...")
   • The experiment was conducted under strict conditions. (重点在实验本身，而不是谁做的实验。)

3. 使句子结构更流畅：当连续使用多个以“人”为主语的句子时，会显得单调，通过使用被动语态，可以变换主语，使文章的节奏和结构更多样化。

   • Many people believe that technology is changing our lives. They argue that it makes us more connected. They also warn that it can lead to addiction. (略显单调)
   • It is widely believed that technology is changing our lives. It is argued that it makes us more connected. However, concerns are also raised that it can lead to addiction. (结构更平衡，更正式)

4. 避免使用模糊或不定的主语：如 "someone", "people", "they" 等，使句子更具体、更正式。

   • Someone left the window open. (比较口语化)
   • The window was left open. (更正式，客观地陈述了一个事实)

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什么时候应该用被动语态？(适用场景)

在英语作文中,以下场景非常适合使用被动语态：

• 学术写作：描述实验、研究、过程和发现。
  • The samples were analyzed using a spectrometer. (样本被分析...)
  • It has been suggested that... (有研究表明...)
• 新闻报道：报道事件，强调事件本身。
  • Five people were injured in the accident. (事故中有五人受伤。)
  • The new law will be passed next year. (新法律将在明年通过。)
• 正式通知或公告：
  • All applications must be submitted by Friday. (所有申请必须在周五前提交。)
  • The library will be closed for renovation. (图书馆将因装修而关闭。)
• 描述流程或操作指南：
  • First, the data should be collected. Then, it must be processed. (数据应被收集，它必须被处理。)
• 表达普遍观点或共识：
  • It is generally accepted that education is the key to success. (人们普遍接受教育是成功的关键。)

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什么时候应该避免用被动语态？(注意事项)

过度使用被动语态会使文章显得冗长、笨拙、缺乏力量，要学会识别并避免不必要的被动语态。

1. 当需要强调动作的发出者时：主动语态通常更直接、更有力。

   • Weak (Passive): The mistake was made by the manager. (错误被经理犯了。)
   • Strong (Active): The manager made the mistake. (经理犯了错误。)

2. 当句子变得冗长且难以理解时：被动语态有时会导致句子包含过多的从句和介词短语，使读者难以抓住核心信息。

   • Clunky (Passive): The final decision was made by the committee after a long discussion that had been taking place for several weeks. (委员会在进行了数周的讨论后做出了最终决定。)
   • Clear (Active): After discussing the issue for several weeks, the committee made the final decision. (在讨论了数周后，委员会做出了最终决定。)

3. 在非正式写作中：如个人邮件、故事、博客等，主动语态通常更自然、更亲切。

   • Less natural (Passive): I was very excited by the gift that was given to me by my friend.
   • More natural (Active): My friend gave me a gift, and I was very excited.

判断法则：问自己一句——“谁/什么做了这个动作？” 如果答案很重要，就用主动语态；如果不重要或不知道，就用被动语态。

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在英语作文中的高分技巧与范例

在引言和结论中表达普遍观点

使用 "It is believed that...", "It is widely argued that...", "There is no denying that..." 等句型，可以引出话题，显得非常客观和学术。

• 范例:
  • In the contemporary world, it is widely believed that technological advancement is the primary driver of social change.
  • There is no denying that environmental protection has become one of the most pressing issues of our time.

在主体段落中描述过程或现象

当分析一个社会现象、历史事件或科学实验时，使用被动语态可以使描述更客观、更侧重于事物本身。

• 范例 (讨论环境污染):
  • In recent decades, our planet has been increasingly damaged by human activities. Vast areas of forest are being cut down every year, and rivers and oceans are polluted by industrial waste. It is estimated that millions of species are threatened with extinction as a result.

灵活结合主动和被动语态

一篇优秀的作文不是只用一种语态,而是根据表达需要，将两者巧妙地结合起来，使文章富有节奏感和表现力。

• 范例 (讨论教育):
  • (Active start) Teachers play a crucial role in shaping students' futures. They not only impart knowledge but also inspire curiosity.
  • (Passive for emphasis) However, in many traditional classrooms, students are often treated as passive recipients of information. Critical thinking is rarely encouraged, and creativity is sometimes suppressed by rigid teaching methods.
  • (Active for solution) To address this problem, educators should adopt more student-centered approaches. They need to create an environment where questions are welcomed and exploration is rewarded.

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常见错误与练习

常见错误:

1. 时态错误：忘记 be 动词的正确形式。

   • 错误：The book is wrote by him.
   • 正确：The book was written by him.

2. 过去分词错误：将动词的过去分词形式用错（不规则动词）。

   • 错误：The building is build last year.
   • 正确：The building was built last year.

3. 介词 "by" 的误用：在不需指出动作发出者时，画蛇添足地加上 "by..."。

   • 冗余：The glass was broken by John.
   • 简洁：The glass was broken. (如果不知道是谁打破的，或者不重要，就不需要 "by John")

练习：

请将下面的主动语态句子改为被动语态,或根据语境选择合适的语态。

1. People are using too much plastic. -> Too much plastic ____.
2. The company will launch the new product next month. -> The new product ____ next month.
3. Someone had cleaned the room before we arrived. -> The room ____ before we arrived.
4. (写作题) 描述一下你所在城市的环境变化，请至少使用3个被动语态的句子。
   • Example: In my city, many old factories have been demolished. New parks and green spaces have been created to improve the quality of life. The air is being cleaned up by stricter regulations on car emissions.

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被动语态是英语写作中的一个强大工具,它不是主动语态的替代品，而是其补充，关键在于理解其功能，把握其适用场景，并学会灵活运用，在学术和正式写作中，恰当使用被动语态能让你的文章显得更加客观、严谨、正式，从而给读者和阅卷老师留下深刻的专业印象。