In the <strong>active</strong> voice the subject performs the action: <em>the committee rejected the proposal</em>. In the <strong>passive</strong> voice the subject receives it, and the doer moves to the end or disappears: <em>the proposal was rejected (by the committee)</em>. Active is usually shorter and clearer; passive is useful when the doer is unknown, obvious or deliberately left out.
The core difference
Voice is about who occupies the subject slot. Active sentences run doer → action → thing acted on. Passive sentences flip that: the thing acted on comes first, the verb picks up a form of be plus a past participle, and the doer either trails behind in a by phrase or vanishes.
- Active: The surveyor inspected the roof.
- Passive: The roof was inspected by the surveyor.
- Passive, doer dropped: The roof was inspected.
The test
Try adding "by zombies" after the verb. If the sentence still works — the roof was inspected by zombies — it is passive. If it collapses — the surveyor inspected by zombies — it is active. Formally: a passive needs a form of be (is, are, was, were, been, being) plus a past participle. Both parts must be there.
When to prefer active
Most of the time. It is shorter, it names who is responsible, and it reads with more momentum. We missed the deadline owns the problem; the deadline was missed quietly hides who missed it. In instructions, reports and anything persuasive, the active voice does more work per word.
When passive is the right choice
- The doer is unknown: My bike was stolen overnight.
- The doer is irrelevant or obvious: The samples were refrigerated for 48 hours. (Nobody cares which technician.)
- You want the receiver as the topic: Forty thousand homes were left without power.
- Tact: An error was made in the invoice — sometimes diplomacy is worth the vagueness.
The common misdiagnosis
Grammar checkers and writing advice routinely flag things that are not passive at all. There were several problems is not passive — it has no past participle. She was tired is not passive — tired is functioning as an adjective describing a state, not an action done to her. The building is old, I am going, it seems broken: none of these are passive. Any be verb makes prose feel static, which is a separate stylistic issue from voice.
Be honest about the advice
"Never use the passive" is a slogan, not a rule. Scientific and legal writing use it constantly and correctly, and skilled writers reach for it whenever the receiver of the action is the real subject of the sentence. The genuine fault is unbroken passive prose that never says who did anything — not the construction itself.
Frequently Asked Questions
How do I spot the passive voice quickly?
Look for a form of be (is, are, was, were, been, being) followed by a past participle, then check whether you could add "by someone" after it. "The files were deleted by someone" works, so it is passive.
Is the passive voice grammatically wrong?
No. It is a standard, fully grammatical construction with real uses — unknown actors, scientific method, keeping the topic in the subject position. The advice to avoid it is about clarity and emphasis, not correctness.
Is "I was tired" passive?
No. "Tired" is working as an adjective describing a state, not an action performed on you. The zombie test proves it: "I was tired by zombies" does not mean the same thing.