Once you know the tools — the active voice, the ser-passive, the passive se, and the impersonal se — the next question is which one to actually use in a given sentence. Spanish has clear preferences, and getting them right is one of the fastest ways to make your writing sound natural instead of translated.
This page walks through the decision process and gives you a practical ranking for everyday use.
The general ranking
In Spanish, roughly in order of how commonly they appear in natural prose:
- Active voice — the default. Use it whenever you have or can invent a subject.
- Passive se — the default when there is no agent to name and the thing acted upon has a number (one thing or many).
- Impersonal se — for truly generic statements about "people".
- Ser-passive — reserved for formal writing, news, history, and cases where the agent is genuinely important.
English speakers usually start too high on this list. Resist the urge to reach for ser + participle just because English used a passive.
Step 1: Can you use the active voice?
If you know (or can reasonably guess) who did it, the active voice is almost always best.
El presidente firmó el decreto ayer.
The president signed the decree yesterday.
Compare this to the ser-passive version: El decreto fue firmado por el presidente ayer. Both are grammatical; the active version is shorter, lighter, and far more common. Use it.
Even when the doer is vague, Spanish cheerfully uses an implicit "they" — the third-person plural — to keep sentences active. This replaces many English passives effortlessly.
Me robaron la bicicleta.
My bicycle was stolen. (literally: they stole the bicycle from me)
If you find yourself writing fue robada or es dicho, back up and try the they-active first. It is almost always better.
Step 2: No agent and the verb has an object? Use passive se.
When the doer really is irrelevant and you want a passive-flavored statement, passive se is the neutral default. Pick it for signs, recipes, announcements, and agent-free statements in general prose.
Se inauguró el nuevo hospital la semana pasada.
The new hospital was inaugurated last week.
Se venden boletos en la entrada.
Tickets are sold at the entrance.
Remember that the verb agrees with the thing (el hospital, boletos), and no por-agent can be added. If you need to name an agent, you cannot use passive se — you must switch to the active or the ser-passive.
Step 3: Generic statement with no patient? Use impersonal se.
When the sentence is about generic human behavior ("one does X"), especially with intransitive verbs, impersonal se is the right tool.
Se vive tranquilo en el pueblo.
Life is calm in the village. (One lives calmly in the village.)
No thing is being acted on, so passive se is not available. The verb stays singular, se is the only subject marker, and the sentence conveys a generalization.
Step 4: Does the agent really matter? Then use ser + participle.
The ser-passive earns its keep when the agent is the point of the sentence: attribution, authorship, historical responsibility, or formal announcement. In those cases, a named por-agent is what you want, and neither passive se nor an implicit they captures the same nuance.
La novela fue escrita por Mario Vargas Llosa en 1963.
The novel was written by Mario Vargas Llosa in 1963.
El acuerdo fue firmado por los tres presidentes.
The agreement was signed by the three presidents.
Both sentences highlight who did the action. That is exactly where the ser-passive is appropriate. Outside of that niche, prefer one of the other tools.
Side-by-side comparison
Let's take a single idea and see all four options:
| Construction | Example | Typical use |
|---|---|---|
| Active | Publicaron el libro en 2020. | Everyday neutral speech |
| Passive se | Se publicó el libro en 2020. | Neutral, no agent mentioned |
| Ser-passive | El libro fue publicado por una editorial mexicana en 2020. | Formal, agent is important |
| Impersonal se | Se cree que el libro es importante. | Generic opinion, no patient |
All four are correct Spanish. The choice is about register, information flow, and whether you need to name who did it. For more on why the ser-passive is the least frequent option, see Restrictions on the Passive.
Common translation traps
A few English constructions trip learners up repeatedly. Here are the Spanish-native fixes:
- "I was told" → Me dijeron. (active they)
- "The window was broken" → Se rompió la ventana. (passive se)
- "The house was built in 1920" → La casa se construyó en 1920. / Se construyó la casa en 1920. (passive se)
- "Spanish is spoken here" → Aquí se habla español. (impersonal se, but often analyzed as passive)
- "The treaty was signed by the three presidents" → El tratado fue firmado por los tres presidentes. (ser-passive — agent matters)
Me robaron la cartera en el autobús.
My wallet was stolen on the bus.
Se construyó el puente en seis meses.
The bridge was built in six months.
Final checklist
Before writing any passive-flavored sentence, run through this mental checklist:
- Can I make this active with a clear subject? Yes → active voice.
- Can I use active with an implicit "they"? Yes → active (they).
- Is there no doer worth mentioning, and a clear thing being acted on? Yes → passive se.
- Is the statement purely generic, with no patient? Yes → impersonal se (or uno).
- Is the agent the whole point, and the register formal? Yes → ser-passive.
Follow this order and your Spanish will feel natural instead of forced. The ser-passive is a real, useful construction — but it is the last resort, not the first tool you grab.
Related Topics
- Passive with Ser + Past ParticipleB2 — Form the true passive voice in Spanish using ser plus a past participle that agrees with the subject.
- Passive Se (Se Venden Casas)B2 — Use se plus a third-person verb to form the passive voice without naming an agent, with the verb agreeing in number with its subject.
- Impersonal Se (Se Habla Español)B2 — Use se with a third-person singular verb to make generic statements about people, equivalent to English one, they, or you.
- Restrictions on the PassiveB2 — Why the ser-passive is less common in Spanish than in English, and what sentences simply do not work in it.