What the two voices are
In an active sentence, the subject does the action: “The editor trimmed the introduction.” In a passive sentence, the subject receives the action: “The introduction was trimmed by the editor.” Both are grammatical, and both say the same thing. What changes is the focus. The active version puts the doer first; the passive version puts the receiver first.
A passive sentence is usually built from a form of “to be” plus a past participle: “was trimmed,” “is being reviewed,” “has been approved.” The doer, if mentioned at all, comes later after “by,” and it is often dropped entirely: “The introduction was trimmed.”
A quick test
Two checks help you find passive constructions in your own writing:
- Look for a “be” verb followed by a past participle (“was written,” “are considered”).
- Try adding “by someone” after the verb. If it still makes sense (“was trimmed by someone”), the sentence is probably passive.
Not every “be” verb signals a passive. “The draft is long” is just a description. “The draft is being revised” is passive, because something is happening to the draft.
Why active constructions often read better
Active sentences tend to be shorter and more direct. They name who is acting, and readers can usually picture the action sooner. Compare:
- Passive: “A decision was made to postpone the launch.”
- Active: “The team decided to postpone the launch.”
The active version is shorter, and it answers a question the passive leaves open: who decided? In instructions, the difference can matter even more, especially for web writing that people follow step by step. “The form should be submitted before the deadline” leaves room for doubt about who should submit it. “Submit the form before the deadline” does not.
Heavy use of the passive can make writing feel vague, bureaucratic or distant. Strings of passive sentences also tend to hide responsibility, whether or not the writer means to. That is one reason that plain language guidance generally encourages the active voice as a default. It is a sensible default, not an absolute rule.
When the passive is the better choice
Treating the passive as an error is a common mistake. It has several legitimate uses.
The doer is unknown or unimportant. “The window was broken overnight” is natural if you do not know who broke it. “Smartphones are manufactured in many countries” works because the manufacturer is not the point.
The receiver is the real topic. If a paragraph is about a particular document, keeping it in the subject position helps the reader follow. “The report was published in March and has been updated twice since” keeps attention on the report.
You want to avoid blame or keep a neutral tone. “The file was corrupted during transfer” avoids an accusation. But if hiding the doer misleads the reader, such as in an apology that avoids saying who made the mistake, the passive can come across as evasive.
Formal or technical contexts. Descriptions of methods often use the passive because the actor is not the focus: “Samples were stored at room temperature.” Even there, many writers now prefer the active when it does not feel awkward.
Smoother flow. Sentences usually read best when old information comes first and new information comes last. If the previous sentence ended with the idea of the new proposal, the next can begin with it: “The proposal was reviewed by three departments.” The passive lets you arrange the sentence that way.
How to convert a passive sentence
When you decide that a sentence would work better in the active voice, follow three steps:
- Find the doer of the action (the “by” phrase, or the person you left out).
- Make that doer the subject.
- Change the verb so it matches.
“The survey results were analyzed by the volunteers” becomes “The volunteers analyzed the survey results.”
If there is no named doer, you may need to decide who it is. “Mistakes were made” requires you to answer, “Who made them?” Sometimes the answer is “we,” and saying so can improve both clarity and honesty. Other times the doer really is unimportant, and the passive can stay.
A common trap: replacing one problem with another
Do not turn every passive sentence into an active one automatically. Doing so can produce clumsy results, such as inventing a vague actor (“People say,” “Someone should”) just to avoid a “be” verb. If the new sentence is no clearer than the old one, leave the old one.
Another trap is mistaking weak writing for passive writing. Padded phrases such as “there is a need for” or “it is important to note that” are not passive in the grammatical sense, but they cause similar problems. Cutting them is part of tightening prose, and it often matters more than the voice.
Using voice during revision
Voice is a sentence-level concern, part of the wider revision process, so it belongs after you have settled the structure and flow of a piece. A practical approach:
- Read through once and mark every passive sentence you find.
- For each one, ask who did the action and whether the reader needs to know.
- If the doer matters, or the sentence is easier to read in the active voice, rewrite it.
- If the receiver is the topic or the doer is unknown, keep the passive.
Reading aloud helps here, and a good glossary of editing terms can clarify any grammar labels you meet. Sentences that sound stiff or evasive when spoken are good candidates for rewriting.
Key takeaways
Active voice names the doer and usually makes sentences shorter, clearer and more direct. Passive voice puts the receiver first and works well when the doer is unknown, obvious or unimportant, or when you want to control emphasis and flow. Use the active voice as your default, and keep the passive where it helps the reader. Automatic grammar flags can find candidates, but only you can judge each one.