Active and Passive Voice in English Grammar: Rules and Examples

Active and passive voice in English grammar are essential topics for improving sentence structure and writing accuracy. Understanding active and passive voice rules helps students identify sentence patterns, change voice correctly and use different tenses with confidence. Whether you are improving your English skills or preparing for competitive exams, this article covers the difference between active and passive voice, tense wise rules, conversion formulas and examples to improve your grammar skills.

What Is Active Voice in English Grammar?

Active voice is a sentence structure in which the subject performs the action expressed by the verb. The subject usually comes before the verb, followed by the object.

Active Voice Formula: Subject + Verb + Object

Examples of Active Voice:

• The teacher explains the lesson.
• She writes a letter.
• The police arrested the thief.
• The students completed the assignment.
• He is reading a newspaper.

In these examples, the subjects (the teacher, she, the police, the students, and he) perform the actions.

When to use active voice:

• When the person performing the action is important.
• When you want to make a sentence clear and direct.
• When writing everyday conversations, reports, and instructions.
• When the doer of an action needs to be clearly identified.

Active voice is widely used in everyday English because it makes sentences straightforward and easy to understand.

What Is Passive Voice in English Grammar?

Passive voice is a sentence structure in which the subject receives the action rather than performing it. The focus is on the person or thing affected by the action.

Passive Voice Formula: Object + Appropriate Form of 'Be' + Past Participle (V3) + (by + Subject)

Examples of Passive Voice:

• The lesson is explained by the teacher.
• A letter is written by her.
• The thief was arrested by the police.
• The assignment was completed by the students.
• A newspaper is being read by him.

In passive voice, the original object becomes the subject of the sentence. The verb changes into an appropriate form to be followed by the past participle of the main verb.

The phrase beginning with “by” identifies the person performing the action. However, it can be omitted when the doer is unknown, obvious or unimportant.

When to use passive voice:

• When the action or result is more important than the doer.
• When the person performing the action is unknown.
• When writing formal reports, scientific descriptions, and official notices.
• When you want to emphasise the person or thing affected by an action.

For example, "The road was repaired yesterday" focuses on the completed work rather than the workers who repaired it.

Difference Between Active and Passive Voice

The main difference between active and passive voice is the focus of the sentence. Active voice emphasises the person performing the action, while passive voice emphasises the person or thing receiving it.

Both forms can be grammatically correct. The choice depends on what you want to emphasize and the purpose of the sentence.

Rules for Changing Active Voice into Passive Voice

Understanding the rules for changing active voice into passive voice is essential for English grammar exercises and competitive examinations.

Follow these steps to convert an active sentence into passive voice.

Rule 1: Identify the Subject, Verb, and Object

First, identify the subject, verb and object in the active sentence.

Example:

Active: The boy kicks the ball.

• Subject: The boy
• Verb: Kicks
• Object: The ball

The object "the ball" becomes the subject of the passive sentence.

Passive: The ball is kicked by the boy.

Rule 2: Move the Object to the Beginning

In passive voice, the object of the active sentence usually becomes the subject of the passive sentence.

Active: The chef prepares the food.

Passive: The food is prepared by the chef.

Rule 3: Use the Correct Form of 'Be'

Choose the appropriate form of the verb according to the tense of the original sentence. Common forms include am, is, are, was, were, be, being, and been.

Examples:

• Active: She writes a story.
• Passive: A story is written by her.
• Active: She wrote a story.
• Passive: A story was written by her.
• Active: She will write a story.
• Passive: A story will be written by her.

Rule 4: Change the Main Verb into Its Past Participle Form (V3)

The main verb in a passive sentence must be in its past participle form.

Examples:

For example:

Active: They built a bridge.

Passive: A bridge was built by them.

Remember that V2 is not always the same as V3. For instance, "wrote" is the past tense of "write", whereas "written" is its past participle.

Rule 5: Change the Subject into the Appropriate Object Pronoun

When the original subject is included after by, change the subject pronoun into its corresponding object pronoun.

Examples:

• Active: He helps me.
• Passive: I am helped by him.
• Active: They invited us.
• Passive: We were invited by them.
• Active: She teaches him.
• Passive: He is taught by her.

Rule 6: Maintain the Original Tense

The tense of the sentence must remain the same when changing active voice into passive voice. The verb structure changes, but the original time reference is preserved.

Active: They are painting the house.

Passive: The house is being painted by them.

Active: They had completed the project.

Passive: The project had been completed by them.

Rule 7: Use 'By' Only When Necessary

The word by introduces the person or thing performing the action in a passive sentence. However, it is not always necessary.

Active: Someone stole my bicycle.

Passive: My bicycle was stolen.

Active: The workers cleaned the office.

Passive: The office was cleaned by the workers.

Active and Passive Voice Rules for All Tenses

One of the most important parts of learning active and passive voice in English grammar is understanding how sentence structures change across tenses. The following table provides the common tense-wise formulas and examples.

Important Note on Tense Conversion

The passive forms of the present perfect continuous, past perfect continuous, future continuous, and future perfect continuous are generally avoided because they are rarely used in standard English. They are usually not included in basic active and passive voice conversion tables.

Also, passive voice generally requires a verb that can take an object. For example, "She sleeps" cannot normally be changed into passive voice because "sleeps" does not take a direct object.

Active and Passive Voice Examples in Different Sentence Types

Different types of sentences follow different rules when changing from active voice to passive voice. Here are common examples to help you understand the conversion process.

1. Assertive Sentences

Assertive sentences make statements. Their basic structure changes according to the tense of the original sentence.

Examples:

• Active: The teacher teaches English.
• Passive: English is taught by the teacher.
• Active: The company launched a new product.
• Passive: A new product was launched by the company.

2. Interrogative Sentences

Interrogative sentences ask questions. When changing them into passive voice, retain the question structure and use the appropriate form of be or the relevant auxiliary verb.

Examples:

• Active: Does she write poems?
• Passive: Are poems written by her?
• Active: Did the police catch the thief?
• Passive: Was the thief caught by the police?
• Active: Have they completed the work?
• Passive: Has the work been completed by them?

3. Imperative Sentences

Imperative sentences express commands, requests, instructions, or advice. Passive constructions often use forms such as "Let...be" or "You are requested to...", depending on the meaning and context.

Examples:

• Active: Open the door.
• Passive: Let the door be opened.
• Active: Complete the assignment.
• Passive: Let the assignment be completed.
• Active: Please help the child.
• Passive: You are requested to help the child.

The most natural passive form depends on the intended meaning. In everyday English, a sentence such as "You are requested to help the child" may sound more natural than a literal conversion.

4. Negative Sentences

Negative sentences contain words such as not or negative auxiliary verbs. The negative meaning must remain unchanged after conversion.

Examples:

• Active: She does not like coffee.
• Passive: Coffee is not liked by her.
• Active: They did not finish the work.
• Passive: The work was not finished by them.
• Active: He has not submitted the report.
• Passive: The report has not been submitted by him.

5. Active and Passive Voice Examples in Different Sentence Types

Modal verbs such as can, could, may, might, must, should, and ought to can be used in passive voice.

Formula: Object + Modal Verb + Be + Past Participle (V3)

Examples:

• Active: She can solve the problem.
• Passive: The problem can be solved by her.
• Active: You must follow the rules.
• Passive: The rules must be followed by you.
• Active: They should complete the task.
• Passive: The task should be completed by them.
• Active: We may postpone the meeting.
• Passive: The meeting may be postponed by us.

Improve Your English Communication Skills with CC Learning App

Looking to speak English more clearly and confidently? The CC Learning App offers practical spoken English classes for students, working professionals, and job seekers. Through interactive live classes, regular speaking exercises, trainer support and personalised guidance, learners can develop their grammar, vocabulary, pronunciation and fluency.

The coaching also helps learners improve their interview skills, presentation abilities, and everyday English communication through practical examples. Whether you are learning English from the basics or looking to refine your existing skills, CC Learning App offers flexible learning options to suit different proficiency levels. Join this multi-learning platform and work towards communicating more effectively in academic, professional and everyday situations.

Frequently Asked Questions

1. What is the difference between active and passive voice?

In an active voice, the subject performs the action. In a passive voice, the subject receives the action. For example, "Ravi writes a letter" is an active voice, while "A letter is written by Ravi" is a passive voice.

2. What is the formula for passive voice?

The basic formula is Object + appropriate form of 'be' + past participle (V3) + optional 'by' phrase. The exact structure depends on the tense and type of sentence.

3. How do you change active voice into passive voice?

Identify the subject, verb, and object. Move the object to the beginning, use the correct form of be, change the main verb to V3, and include the original subject after by when necessary.

4. Can all active voice sentences be changed into passive voice?

No. Sentences with intransitive verbs that do not take an object generally cannot be converted into passive voice using the standard rules.

5. Which tense is commonly used in passive voice?

Passive voice can be used in several tenses, including simple present, present continuous, present perfect, simple past, past continuous, past perfect, and simple future. The appropriate structure depends on the intended meaning.

6. Is passive voice incorrect in English grammar?

No. Passive voice is grammatically correct when used appropriately. It is useful when the action or its receiver is more important than the person performing it.

7. How can I practise active and passive voice for competitive exams?

Study the rules for each tense, practise sentence conversion, revise irregular verb forms, and solve previous-year questions and grammar exercises relevant to your examination.