Active-Passive Voice
Active and Passive Voice are two ways of expressing the same idea, but they differ in focus. In the active voice, the subject performs the action. In the passive voice, the subject receives the action, and the doer (agent) may or may not be mentioned.
Structure
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Active Voice: Subject + Verb + Object
Example: The teacher (S) explains (V) the lesson (O). -
Passive Voice: Object + Form of “be” + Past Participle + (by + Subject)
Example: The lesson (O) is explained (V) by the teacher (S).
Rules for Conversion
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Object of active → Subject of passive.
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Verb → “Be” form + Past Participle.
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Subject of active → Agent (“by” phrase) in passive (can be omitted if unimportant).
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Pronoun changes:
- I → me, We → us, He → him, She → her, They → them.
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Tense must be preserved.
Tense-Wise Conversion
| Tense | Active | Passive |
|---|---|---|
| Present Simple | She writes a letter. | A letter is written by her. |
| Past Simple | He bought a car. | A car was bought by him. |
| Future Simple | They will finish the work. | The work will be finished by them. |
| Present Continuous | She is reading a book. | A book is being read by her. |
| Past Continuous | He was writing a letter. | A letter was being written by him. |
| Present Perfect | They have completed the task. | The task has been completed by them. |
| Past Perfect | She had cleaned the room. | The room had been cleaned by her. |
| Future Perfect | He will have finished the project. | The project will have been finished by him. |
(Future Continuous is rarely used in passive voice.)
When to Use Passive Voice
- To emphasize the action rather than the doer.
- When the doer is unknown or unimportant.
- In formal/scientific writing.
Example: The experiment was conducted successfully.
Common Mistakes
- Forgetting to change pronouns correctly.
- Using the wrong form of “be” with the verb.
- Overusing passive voice, making sentences less direct.
Examples
Example 1 — Present Simple
Active: The chef cooks the meal.
Passive: The meal is cooked by the chef.
Example 2 — Past Simple
Active: They built the bridge.
Passive: The bridge was built by them.
Example 3 — Future Simple
Active: She will deliver the speech.
Passive: The speech will be delivered by her.
Example 4 — Present Continuous
Active: He is repairing the car.
Passive: The car is being repaired by him.