Active Voice and Passive Voice | Key Concepts & Examples

Active voice and passive voice are two important concepts in English grammar that describe the relationship between the subject and the action of a sentence. Understanding the difference between them helps learners write more clearly, accurately, and effectively. Active voice emphasizes the doer of the action, while passive voice highlights the action or its result. This article explains active and passive voice in detail, covering their definitions, structures, rules, pronoun changes, tense conversion, and examples from all major tenses. It is designed to help students, teachers, and competitive exam candidates gain a clear and practical understanding of how and when to use each voice correctly.

What is Active Voice?

Active voice is a form of sentence in which the subject performs the action of the verb. In active voice, the sentence structure is clear and direct, making it easy to understand who is doing the action. The usual order of an active voice sentence is subject, verb, and object. Active voice is commonly used in everyday speaking and writing because it sounds natural, strong, and straightforward. For example, in the sentence “She writes a letter,” the subject “she” performs the action of writing, which makes the sentence active.

Structure:

Subject + Verb + Object

Examples:

• She writes a letter.
• The teacher explains the lesson.
• Ali plays cricket.

What is Passive Voice?

Passive voice is a form of sentence in which the subject receives the action of the verb instead of performing it. In passive voice, the focus is on the action or the result rather than on the person who does the action. The object of the active sentence becomes the subject of the passive sentence, and the verb is changed into its past participle form with a suitable helping verb. The doer of the action may be mentioned using “by” or omitted if it is unknown or not important. Passive voice is commonly used in formal writing, reports, and situations where the action is more important than the doer.

Structure:

Object + helping verb + past participle (V3) + by + subject

Examples:

• A letter is written by her.
• The lesson is explained by the teacher.
• Cricket is played by Ali.

Why Do We Use Passive Voice?

We use passive voice when:

• The doer is unknown
• The action is more important
• The doer is obvious or not important

Examples:

• My wallet was stolen.
• English is spoken all over the world.
• The road is repaired.

Rules to Change Active Voice into Passive Voice

1. Identify the subject, verb, and object in the active sentence.
2. Make the object of the active sentence the subject of the passive sentence.
3. Use the correct helping verb according to the tense of the sentence (is, am, are, was, were, being, been, will be, etc.).
4. Change the main verb into its past participle form (verb 3).
5. Move the subject of the active sentence after the verb and add by before it.
6. Omit the “by + subject” part if the doer is unknown, unimportant, or obvious.
7. Make sure the helping verb agrees with the new subject in number (singular or plural).
8. Passive voice can be formed only when the sentence has an object (transitive verb).
9. Do not form passive voice for continuous perfect tenses and some future continuous forms, as they are not normally used.
10. Keep the meaning of the sentence the same while changing the structure.

 Change of Subject Pronouns to Object Pronouns in Passive Voice

When the subject of an active sentence is a pronoun, it changes to its object form in the passive sentence and usually comes after “by.” This ensures grammatical correctness and maintains clarity.

Subject Pronoun → Object Pronoun

• I → me
• We → us
• You → you
• He → him
• She → her
• It → it
• They → them

Notes:

“You” and “It” remain the same in both cases.

The “by + object pronoun” part can be omitted if the doer is unknown or unimportant.

Tense Change in Active and Passive Voice

While changing a sentence from active voice to passive voice, the tense of the sentence usually remains the same, but the verb form changes according to passive structure. Most simple, continuous, perfect, and future tenses retain their original tense in passive voice by using the appropriate form of “be” + past participle (V³). However, some continuous perfect tenses (such as present perfect continuous, past perfect continuous, and future continuous) do not have a natural or commonly used passive form because their passive constructions become grammatically awkward or unclear. Therefore, only those tenses that can clearly show the action and its result are normally used in passive voice.

Examples of Active Voice to Passive Voice – All Tenses

1. Present Simple Tense

• Active: She writes a letter.
• Passive: A letter is written by her.

2. Present Continuous Tense

• Active: He is painting the house.
• Passive: The house is being painted by him.

3. Present Perfect Tense

• Active: They have completed the work.
• Passive: The work has been completed by them.

4. Present Perfect Continuous Tense (No Passive Form)

• Active: She has been writing a letter.
• Passive: No natural passive form is used.

5. Past Simple Tense

• Active: He wrote a report.
• Passive: A report was written by him.

6. Past Continuous Tense

• Active: She was washing the clothes.
• Passive: The clothes were being washed by her.

7. Past Perfect Tense

• Active: They had finished the project.
• Passive: The project had been finished by them.

8. Past Perfect Continuous Tense (No Passive Form)

• Active: He had been repairing the car.
• Passive: No natural passive form is used.

9. Future Simple Tense

• Active: She will announce the result.
• Passive: The result will be announced by her.

10. Future Continuous Tense  (No Passive Form)

• Active: They will be preparing the dinner.
• Passive: No natural passive form is used.

11. Future Perfect Tense

• Active: He will have completed the task.
• Passive: The task will have been completed by him.

12. Future Perfect Continuous Tense (No Passive Form)

• Active: She will have been teaching the class.
• Passive: No natural passive form is used.