Voice helps a writer or speaker signal what should stand out in a sentence. Active voice foregrounds the agent and the action, while passive voice foregrounds the receiver of the action or the result. The choice also depends on register, because scientific, legal, journalistic, and technical writing often needs a different level of distance or objectivity than conversation. Related style choices also appear in Formal Speech and Informal Speech.

Scientific reports and academic papers often prefer passive voice when the method, process, or result matters more than the person doing the action. This creates a neutral and impersonal tone that suits objective description. Passive forms are especially common in research writing, where the focus stays on what was done and what was found.

Idea	Example
Passive voice foregrounds methods and results.	The samples were analyzed in the laboratory.
Academic prose often avoids repeated mention of the researcher.	The theory was tested across several experiments.
Scientific writing often presents actions as completed processes.	The solution was heated until it changed color.

In informal spoken English, active voice is usually preferred because it sounds direct, natural, and economical. Passive voice can sound wordier, more distant, or less personal in conversation. Learners often choose active voice in everyday speech unless the speaker wants special emphasis on the result.

Idea	Example
Active voice sounds direct in conversation.	My friend fixed the car yesterday.
Passive voice can sound distant in speech.	The car was fixed yesterday.
Informal language usually favors clarity over impersonality.	We changed the plan after lunch.

Procedures, instructions, and technical descriptions often use passive voice when the object or step matters more than the person performing it. This style keeps attention on the sequence of actions and helps the text feel neutral and precise. It is common in manuals, lab procedures, and similar instructional genres.

Idea	Example
Passive voice suits step by step procedures.	The device is assembled before it is tested.
Instructions can sound objective when the actor is unimportant.	The files are stored in a secure folder.
Technical writing often emphasizes the process.	The mixture is stirred for five minutes.

Journalistic writing often uses passive voice when the agent is unknown, unimportant, or sensitive. This allows the sentence to present facts without naming the actor too early or at all. Passive voice can therefore support a restrained and objective tone in news reporting.

Idea	Example
Passive voice can hide an unknown agent.	The window was broken during the night.
Objective reporting may emphasize the event instead of the doer.	The policy was approved after debate.
Sensitive stories may avoid direct identification.	Several documents were leaked to the press.

Legal and official writing often favors passive voice because it sounds impersonal, formal, and careful. The structure helps focus on obligations, decisions, and results rather than on individuals. This style is common in contracts, regulations, and official notices.

Idea	Example
Passive voice supports formality in legal texts.	The application was rejected by the committee.
Official language often sounds impersonal.	The report was filed on time.
Legal writing may focus on the action itself.	The license was renewed by the agency.

Passive voice is usually formed with be plus a past participle. When the doer must be named, a by phrase introduces the agent. The tense of be changes to match the time of the action, so the auxiliary is part of the meaning.

Idea	Example
Passive voice uses be plus past participle.	The bridge was built in 1998.
A by phrase introduces the agent.	The speech was delivered by the president.
The auxiliary changes with tense.	The letters are being sorted now.

Active voice makes the agent the subject and often feels more direct and energetic. Passive voice makes the receiver or result the subject and is useful when that element deserves emphasis. A sentence should be shaped by what the writer wants the reader to notice first.

Idea	Example
Active voice highlights the doer.	The engineer designed the system.
Passive voice highlights the receiver.	The system was designed by the engineer.
Voice changes the focus of the sentence.	The committee approved the plan.

To change active voice into passive voice, identify the agent, move the receiver into subject position, and adjust the verb form and tense. The original subject becomes a by phrase only when it is needed. This process also depends on sentence structure, so it connects closely with Clauses and Word Order.

Idea	Example
The receiver becomes the new subject.	The chef prepared the meal.
The verb changes to passive form.	The meal was prepared by the chef.
The agent can move into a by phrase.	The letter was written by Maria.

Passive voice cannot be formed from every verb, because intransitive verbs do not have a direct object to become the new subject. Another common problem is using the wrong auxiliary tense after converting an active sentence to passive. Some idiomatic passives and regional preferences also vary, so style is not always identical in every variety of English.

Idea	Example
Intransitive verbs do not form normal passive structures.	The baby slept.
The auxiliary must match the original tense.	The task was completed yesterday.
Usage can vary across styles and regions.	The proposal was accepted quickly.

Active and passive voice are not competing forms with equal value in every situation, because each one serves a different purpose. Active voice is usually best when the agent and action should feel vivid, direct, or conversational, while passive voice is often better when the result, process, object, or level of formality should come first. Skilled writing depends on choosing the voice that matches the register, the audience, and the information structure of the sentence.