Passive voice misuse happens when a writer hides the doer with a form of “to be” plus a past participle, making the sentence harder to scan and weakening clarity. In scientific writing, passive clauses account for about 30% of all clauses, so passive voice isn't automatically wrong. The main problem appears when the actor matters but disappears from the sentence.
You've probably felt this while reviewing a report, essay, or business email. A sentence such as “The final decision was made after further consideration” sounds formal, but it leaves an obvious question unanswered: Who made the decision? A clearer version, “The committee made the final decision after further consideration,” gives the reader the action and the actor at once.
Recognizing the Silent Killer in Your Drafts
“The proposal was reviewed, revisions were requested, and approval was eventually granted.”
Nothing in that sentence is grammatically broken. Yet it feels heavy because the people responsible for each action have vanished. Who reviewed the proposal? Who requested revisions? Who granted approval?
Now compare it with this version:
“The editorial team reviewed the proposal, requested revisions, and granted approval.”
The second sentence is easier to follow because each action has a visible subject. The reader doesn't need to pause and reconstruct the chain of events.
Why writers miss the problem
Passive voice misuse often hides in writing that aims to sound formal. Writers may remove “we,” “the team,” “the manager,” or “the researchers” because they associate visible actors with an informal style. The result can look polished while making responsibility difficult to identify.
A sentence can also become passive during revision. You might start with “We changed the schedule,” then soften it into “The schedule was changed.” The revision may seem less personal, but it also removes useful information.
Reader test: If you need to ask “Who did that?” after reading a sentence, check whether passive voice has hidden the actor.
The friction becomes especially noticeable when several passive constructions appear together. “The data was collected, the samples were processed, and the conclusions were reported” keeps the focus on objects, but it gives the paragraph no clear human or institutional subject. Passive voice isn't a problem merely because it appears. It becomes a problem when the missing actor carries meaning.
What Passive Voice Misuse Is
A sentence can look polished while hiding the person responsible for the action. Passive voice follows a recognizable mechanical pattern: a form of “to be” appears with a past participle. Common signals include is, are, was, were, has been, have been, had been, will be, and being, followed by forms such as written, completed, reviewed, or approved. The University of North Carolina Writing Center's explanation of passive voice describes this pattern as a practical way to identify passive construction.
Consider the sentence:
“The report was written by Maya.”
- The report receives the action.
- Was is the form of “to be.”
- Written is the past participle.
- By Maya names the actor, though the actor can be omitted.
The active version changes the order:
“Maya wrote the report.”
Now Maya performs the action, wrote carries the main verb, and the report receives the action. The meaning stays similar, but the sentence lets the reader see who acted.
The structure is only the first check
Passive voice misuse occurs when the structure conceals an actor who matters, leaves that actor vague, or places it awkwardly in a “by” phrase. “The window was broken” may fit when nobody knows who broke it. “The finance team approved the budget” gives clearer information when that team's decision matters.
Passive voice isn't automatically wrong; it becomes problematic when the missing actor carries meaning. A grammatically correct sentence can still make the reader search for the action's source, then decide whether that missing information matters. That extra work can slow comprehension, especially in technical prose.
A review of 9 studies on English academic writing found consistent evidence that passive voice can reduce readability and comprehension, with passive texts associated with slower processing and lower comprehension scores (review of passive voice and academic readability). The finding does not condemn every passive sentence. It points to a practical editing question: does this construction help focus attention, or does it hide information the reader needs?
How to Spot and Fix Weak Sentences
Start with a quick scan. Look for a form of “to be” followed by a past participle, then ask one question: Who performed the action?
The sentence “The files were deleted” passes the first mechanical check. The next question determines whether revision is needed. If the files disappeared because of an unknown technical error, the passive may be useful. If an employee deleted them and the identity affects the situation, name that employee.
Use the “by zombies” test carefully
Hamilton's writing guide recommends adding “by zombies” after the verb. If the sentence still makes grammatical sense, it's probably passive. “The report was completed by zombies” sounds structurally possible, so “The report was completed” likely uses passive voice. “The team completed the report by zombies” doesn't make sensible grammatical or semantic use of the test because “the team” already performs the action.
The test is a prompt, not a final judgment. Some sentences contain “to be” without being passive:
- “The researchers are tired.”
- “The results were surprising.”
- “The team is ready.”
In these examples, tired, surprising, and ready function as descriptions, not past participles in a passive action.
Apply the transformation
Once you identify a needless passive sentence, use this simple rule:
Make the subject the doer of the action.
-
“The policy was changed by the director.”
“The director changed the policy.” -
“A mistake was discovered in the calculation.”
“The analyst discovered a mistake in the calculation.” -
“The customer's request was ignored.”
“The support team ignored the customer's request.”
If the original sentence doesn't name the actor, supply one only when the context supports it. Don't invent responsibility. If you don't know who acted, keep the passive or revise around the uncertainty: “The system deleted the files, but the cause remains unknown.”
For a broader editing framework focused on direct, active wording, see this AEO guide for active voice. Lumi's related guide on changing passive to active voice can also help you practice the same conversion pattern.
Before and After Examples for Clear Writing
The fastest way to understand passive voice misuse is to compare sentences in context. The strongest revision doesn't always make the sentence shorter. It makes the responsibility, sequence, or purpose easier to see.
| Weak Passive Sentence | Strong Active Sentence | Context |
|---|---|---|
| Mistakes were made during the launch. | We made mistakes during the launch. | Everyday writing |
| The kitchen was cleaned before the guests arrived. | Jordan cleaned the kitchen before the guests arrived. | Everyday writing |
| Content is generated daily for the company blog. | Our content team generates articles daily for the company blog. | SEO and blog writing |
| Keywords were added to improve the page structure. | The SEO editor added keywords to improve the page structure. | SEO and blog writing |
| The meeting was rescheduled by management. | Management rescheduled the meeting. | Professional communication |
| The client's concerns were addressed by the account director. | The account director addressed the client's concerns. | Professional communication |
| The samples were placed in a controlled environment. | The researchers placed the samples in a controlled environment. | Academic writing |
| The final recommendation was approved by the review panel. | The review panel approved the final recommendation. | Academic and professional writing |
Everyday prose
“Mistakes were made” is a familiar example because it sounds neutral while avoiding responsibility. “We made mistakes” is more direct when the writer represents the people involved. If the writer doesn't know who made them, “The launch included several mistakes” preserves uncertainty without pretending to identify the actor.
SEO and blog content
“Content is generated daily” centers the output but hides the process. “Our content team generates articles daily” tells readers who creates the material and gives the sentence a stronger subject-verb connection. It also avoids making content production sound automatic when people are responsible for planning and writing it.
Professional and academic writing
“The meeting was rescheduled by management” isn't incorrect, but “Management rescheduled the meeting” puts the decision-maker first. In a methods section, however, “The samples were placed in a controlled environment” may be suitable when the samples and procedure matter more than the individual researcher.
When a paragraph contains several unclear sentences, don't revise each one in isolation. Read the sequence and identify where the reader needs an accountable actor. The guide to rewriting a paragraph for clarity is useful when the problem extends beyond a single verb.
When Passive Voice Works
Strong writing uses both voices deliberately, choosing active voice for accountability and passive voice for focus. Passive voice earns its place when the action, result, or recipient matters more than the performer, or when the actor is unknown, obvious from context, or irrelevant to the point.
“The package was delivered this morning” works when the reader needs the delivery status, not the courier's identity. “The suspect was arrested” may suit a report when the arrest is the subject and the officers' names add nothing useful. “The bridge was damaged during the storm” keeps attention on the damage, especially when the storm, rather than a person, caused it.
University of Toronto guidance identifies several suitable uses: the actor may be unknown or unimportant, or the writer may want to emphasize the action or object (guidance on revising passive voice). Grammarly also points to experimental setups, where the recipient or procedure may deserve emphasis (passive voice guidance from Grammarly).
Academic writing needs judgment
Passive voice has a long history in scientific and academic prose. A 2014 study found that about 30% of all clauses in scientific writing were passive, with roughly 29% of passives appearing in methodology sections (study of passive voice in scientific writing). A 2001 comparative study reported that over 30% of verbs were passive in scientific research articles, compared with 2% in spontaneous conversation. These findings help explain why passive constructions can sound ordinary in formal research yet unnatural in everyday writing, using the same source.
Usage has also declined in some major academic markets. A corpus study covering 1985 to 2015 found passive use falling from 66.4% to 58.7% of passivizable verbs in British English and from 62.2% to 46.4% in American English (corpus study of passive voice in scientific articles). A separate long-run study of applied linguistics abstracts from 1990 to 2019 reported an overall decline, with a negative relationship between passive use and the rise of personal-pronoun active uses, especially in co-authored abstracts, using that same source.
Discipline matters too. A corpus study of 450 SSCI/SCI-indexed research articles from 1980 to 2020 found strong disciplinary differences in methods sections. Social sciences showed the steepest decline, while natural sciences stabilized after 2000. The change came mainly from reductions in procedural and causative passives (disciplinary study of passive voice in methods sections).
Use a simple test: Does naming the actor help the reader understand responsibility, evidence, or sequence? If it does, make the actor visible. If it does not, passive voice may keep the sentence focused. The goal is not to eliminate a grammatical form, but to ensure readers can quickly see what happened and who matters.
Practice and Final Tips for Writers
Take a paragraph from your own draft and mark every form of “to be.” Don't replace each one automatically. Check whether it joins a subject to a description, or whether it helps form a passive action.
Then try this short exercise:
- “The invoice was approved by the director.”
- “The files were misplaced.”
- “The results were analyzed using the selected method.”
- “The customer's complaint was resolved.”
Rewrite the sentences whose actors matter. Possible revisions include “The director approved the invoice” and “The support team resolved the customer's complaint.” For the second sentence, keep the passive if nobody knows who misplaced the files. For the third, choose based on your field and focus. “The research team analyzed the results using the selected method” is clearer when the team's action matters, while the passive may work when the method and results are central.
Editing rule: Find the actor first. Change the voice only after you know whether the actor belongs in the sentence.
Active voice isn't automatically informal, and passive voice isn't automatically academic. Strong writing uses both deliberately. After your own voice pass, a grammar checker can help flag awkward phrasing, punctuation, and sentence-level clarity issues. Treat the tool as a second review, not a replacement for deciding who needs to appear as the doer.
Lumi Humanizer can help refine awkward phrasing and make AI-assisted or heavily edited text sound more natural while preserving its meaning. Visit Lumi Humanizer to review your draft, then check each suggested change yourself so the final version keeps the right balance between clarity, agency, and appropriate passive voice.