Active versus passive voice

Voice describes the relationship between a sentence's subject and its verb. Active and passive voice can express the same event, but they put different information in the foreground. Editing questions often test whether you can identify the subject, locate the doer of the action, and decide whether a revision preserves the intended meaning.

Active voice: the subject does the action

In active voice, the grammatical subject performs the verb's action. In “The students analyzed the passage,” students is the subject, analyzed is the verb, and the passage is the object. Active constructions often make the actor and action easy to identify.

Passive voice: the subject receives the action

In passive voice, the subject receives the action. “The passage was analyzed by the students” makes the passage the subject, while a phrase beginning with by identifies the actor. Passive forms commonly use a form of be—am, is, are, was, were, be, been, or being—followed by a past participle such as written, chosen, or analyzed.

A quick way to identify passive voice

1. Find the main verb phrase, including any helping verbs.
2. Ask whether the grammatical subject performs the action or receives it.
3. Look for a form of be plus a past participle, such as was selected or has been completed.
4. If needed, add a by-phrase to reveal who performs the action: “The report was prepared by the analyst.”

The be-plus-participle pattern is a clue, not a complete test. “The door is closed” may describe a state rather than an action. “She is running” is active progressive, not passive, because she performs the running. Check meaning and sentence structure instead of labeling every be verb as passive.

When passive voice is useful

Passive voice can be effective when the receiver of the action is the topic, the actor is unknown, or the actor does not matter: “The building was completed in May.” Scientific and formal writing may use passive constructions to emphasize a process or result. The question is whether the choice serves the sentence, not whether passive voice appears at all.

When active voice improves a sentence

Passive voice can make a sentence vague if it hides an actor the reader needs to know. “The records were altered” leaves out who altered them. If responsibility matters, an active revision is clearer: “The clerk altered the records.” Active voice can also reduce wordiness when the passive version uses a long by-phrase or vague helper phrase.

How to revise without changing tense or meaning

To change passive to active, identify the actor in the by-phrase or context, make that actor the subject, and keep the verb tense. “The samples were tested by the laboratory” becomes “The laboratory tested the samples.” If the actor is unknown, do not invent one. “The documents were removed” may be the most accurate version when the sentence does not say who removed them.

Common editing traps

• Calling a sentence passive just because it contains is, was, or were.
• Changing the tense while moving the actor into subject position.
• Adding an actor that the original passage does not identify.
• Revising every passive sentence even when the receiver, process, or result should remain the focus.
• Confusing passive voice with a sentence that has no direct object; voice depends on how the subject relates to the action.

A two-question exam check

First ask, “Who or what performs the action?” Then ask, “Does the current subject perform it or receive it?” If clarity improves by naming the actor as the subject, an active revision may be better. If the actor is unknown or less important than the result, passive voice may be appropriate.

Key takeaway

Active voice places the doer in the subject position; passive voice places the receiver there. Recognize the structure, then revise only when the change improves clarity and keeps the original tense and meaning.

Find the subject that performs or receives the action

In active voice, the grammatical subject performs the action: “The reviewer checked the application.” In passive voice, the subject receives the action: “The application was checked by the reviewer.” Passive voice typically uses a form of be plus a past participle, sometimes with a by-phrase naming the actor. Voice changes sentence focus; it does not change the underlying event.

Passive voice is useful when the actor is unknown, obvious, or less important than the result: “The documents were misplaced.” It can also suit a method description where the procedure matters more than who performed it. Active voice is often shorter and makes responsibility clear. Choose according to purpose rather than treating passive voice as automatically wrong.

Recognize passive constructions accurately

A form of be plus a participle is not always passive. In “The reviewer is tired,” tired is an adjective describing a state. In “The reviewer is checking the application,” checking is a present participle in a progressive active construction. A passive requires the subject to receive an action: “The application is being checked.” Identify the relationship between subject and verb.

Some passive sentences omit the actor: “The deadline was extended.” If knowing who extended it matters, add the actor: “The board extended the deadline.” If the actor does not matter, the passive may be concise. Avoid inventing an actor that the source does not identify.

Revise voice without changing meaning

To change passive to active, identify the actor in the by-phrase or context, make it the subject, and adjust the verb: “The policy was approved by the committee” becomes “The committee approved the policy.” Preserve tense and aspect: “was being reviewed” becomes “the staff were reviewing,” not simply “reviewed.” If the actor is unknown, retain the passive or choose a neutral construction.

Overuse of passive voice can hide accountability or create long sentences, but a series of active verbs can become repetitive. Vary sentence structure when it helps the reader. In an exam editing question, choose the version that is grammatical, clear, and faithful to the original emphasis.

• Active: subject performs the action.
• Passive: subject receives the action, often with be + past participle.
• Do not classify every be + word as passive; examine meaning and verb form.
• Name the actor when responsibility matters and evidence identifies it.
• Preserve tense and meaning when changing voice.