How do I identify passive voice?

Look for a form of 'to be' followed by a past participle — was written, is being reviewed, had been decided. A useful test is whether you can add 'by zombies' after the verb and still have a grammatical sentence: 'the proposal was rejected by zombies' works, so it is passive.

Is passive voice bad writing?

No. It is a normal grammatical construction with legitimate uses, and blanket advice to avoid it produces contorted sentences. Scientific writing, journalism about unknown actors, and sentences where the recipient matters more than the doer all use it correctly.

When should I use passive voice?

When the actor is unknown, when the actor is irrelevant, when the thing acted upon is the real subject of the passage, or when you want to keep the sentence subject consistent across a paragraph for flow.

Does Microsoft Word's passive voice warning matter?

Treat it as a prompt to check, not an instruction. Grammar checkers flag every passive construction regardless of whether it is appropriate, so following the suggestion blindly will make some sentences worse.

Active and Passive Voice: When Each One Is Right

Most advice says avoid the passive, which is wrong. How to tell them apart, the four cases where passive is better, and the one where it is dishonest.

Almost every style guide says the same thing: avoid the passive voice. Almost every style guide is wrong, or at least too blunt to be useful.

The passive is a normal grammatical construction with four legitimate uses. Following the blanket advice produces contorted sentences where a passive would have been clearer, and — more importantly — it misses the one case where the passive really is a problem, which is not a grammatical issue at all.

Telling them apart

Active: the actor comes first, then the action, then what was acted upon.

The committee rejected the proposal.

Passive: what was acted upon comes first, the action follows, and the actor is either demoted to the end or dropped entirely.

The proposal was rejected by the committee.

The proposal was rejected.

Grammatically, look for a form of to be — was, is, were, has been, is being — followed by a past participle.

The most reliable test is the zombie test: if you can insert "by zombies" after the verb and the sentence still works, it is passive.

The proposal was rejected by zombies. ✓ passive

The committee rejected by zombies the proposal. ✗ active

Two things that get misidentified constantly. "Was" alone is not passive — "the meeting was long" is a simple description. And the past tense is not the passive — "I wrote the report" is active and past.

Why the active is the default

It earns its default status for real reasons.

It is shorter. "The committee rejected the proposal" is five words; the passive version is seven. Across a document that adds up.

It says who did it. The actor is present and accountable, which is usually the information a reader most wants.

It is easier to process. Actor-action-object matches how English speakers expect sentences to arrive, so the reader does less work.

It carries energy. A sentence with a person doing something has momentum that a sentence with something being done lacks.

So when in doubt, go active. The point of this article is that "in doubt" covers less ground than the advice implies.

The four cases where the passive is better

1. The actor is unknown

My bike was stolen overnight.

Nobody knows who stole it. The active version — "someone stole my bike" — introduces a vague placeholder subject that adds nothing. The passive is more direct here, not less.

2. The actor is irrelevant

The samples were refrigerated overnight.

The road was resurfaced last summer.

In a lab report, who operated the fridge is not information anybody needs. In fact scientific writing uses the passive heavily and correctly, because the method matters and the technician does not. Forcing the active — "a research assistant refrigerated the samples" — adds a detail that distracts from the point.

3. The recipient is the real subject

Sometimes the thing acted upon is what the passage is actually about, and it belongs in the subject position.

Marie Curie was awarded the Nobel Prize in Physics in 1903, and a second in Chemistry in 1911.

The active version puts the committee first: "The Royal Swedish Academy of Sciences awarded Marie Curie…" That is a sentence about the Academy. If your paragraph is about Curie, the passive keeps her where she belongs.

4. Keeping the subject consistent

This is the use almost no style guide mentions, and it is the one that most improves flow.

Prose reads better when consecutive sentences keep the same subject. The passive lets you do that when the actor changes.

The manuscript sat unread for three years. It was eventually rescued by a junior editor, then rewritten twice, and finally published to almost no attention.

Forcing the active would swap subjects three times — the manuscript, then the editor, then the publisher — and the paragraph would lurch. The passive keeps the manuscript in the subject position throughout, which is what makes it read smoothly.

This is a genuine craft use, related to the rhythm work in sentence rhythm.

The case where the passive is a problem

Not grammar. Accountability.

Mistakes were made.

The decision was taken to close the department.

Concerns have been raised about the proposal.

Every one of these is grammatically fine and rhetorically dishonest. Each drops the actor precisely where the actor is the information: who made the mistakes, who decided, who raised concerns.

This is the passive doing concealment work, and it is endemic in corporate and political writing because it is useful — it lets you report an event without accepting responsibility for it or naming anyone who might object.

The test is not "is this passive?" but "is the missing actor the thing I most need to know?" If yes, the sentence is evading. If no, the passive is fine.

Applied to the examples above: yes, yes, and yes. Applied to "the samples were refrigerated overnight": no. Same construction, opposite verdicts.

This is also why blanket anti-passive advice is unhelpful. It catches "the samples were refrigerated" and lets "we have decided to restructure" through — when the second is where the reader was being managed.

Grammar checkers

Word, Google Docs, and Grammarly all flag passive constructions, and none of them can tell which of the five cases above applies. They pattern-match on to be plus participle.

Treat the flag as a prompt to check, not an instruction to change. Ask: is the actor unknown, irrelevant, less important than the recipient, or being kept out of the subject position for flow? If any of those, keep it. If none, and the actor is someone a reader would want named, rewrite it.

Following the suggestion blindly is how you end up with "a research assistant refrigerated the samples" in a paper about enzyme kinetics.

A practical pass

On a draft you have already written:

Search for "was," "were," "is," "are," "been," and "being." Most hits will be ordinary uses, not passives — that is fine, you are scanning.
For each genuine passive, ask who the actor is. If you cannot say, it is probably case 1 or 2 and the passive is right.
If you can say, ask whether the reader would want to know. If yes, rewrite it active. If no, leave it.
Check the paragraph, not just the sentence. If making one sentence active would break subject continuity across three others, the passive was serving flow.
Read it aloud. Passive pileups sound heavy long before you can name why.

Expect to change some and keep others. A page of prose with no passive constructions at all is as suspicious as one that is nothing but — it usually means someone applied a rule rather than making decisions.

The wider principle is the same as everywhere else in writing craft: the rules are descriptions of what usually works, not laws. Knowing why a rule exists tells you when to break it, which is the whole difference between following a style guide and having a style. More of that reasoning is in how to write like a human.