Walk down any street in Madrid and you will see this construction on a hundred shop windows: Se vende, Se alquila, Se necesita camarero, Se hablan idiomas. This is the pasiva refleja — sometimes called the "se passive" or "reflexive passive" — and it is the construction Spanish reaches for whenever English would say X is/are sold, X is/are spoken, X is being built, without naming who does the action. For everyday peninsular Spanish it is far more frequent than the textbook ser-passive (la casa fue vendida), which in spoken Spanish would sound almost comically formal in a shop-window context.
This page covers how the pasiva refleja is formed, when the verb is singular and when plural, the registers and text types where it dominates, and — critically — how to keep it apart from the impersonal se (se vive bien aquí) that looks deceptively similar.
The construction at a glance
The pasiva refleja has three pieces:
- The pronoun se (always, invariable).
- A verb in the third person, singular or plural.
- A grammatical subject that is the patient of the action — the thing being sold, built, spoken, eaten — almost always a non-human noun.
The agent (the person doing the action) is not expressed. That is the whole point of the construction: the speaker either does not know, does not care, or considers it irrelevant who is doing the action.
Se vende piso en el centro, dos dormitorios, terraza.
Flat for sale in the centre, two bedrooms, terrace. (classified ad)
Se hablan tres idiomas en esta empresa: español, inglés y alemán.
Three languages are spoken at this company: Spanish, English and German.
Aquí se hacen las mejores croquetas de Madrid, te lo aseguro.
They make the best croquettes in Madrid here, I'm telling you.
In the last example, English defaults to they make — a vague generic they — exactly because English avoids the passive when the agent is unknown. Spanish has the opposite preference: when there is no specific agent, the pasiva refleja is the natural choice.
Number agreement: this is the heart of the rule
The single most important fact about the pasiva refleja is that the verb agrees in number with the patient, not with se. Se is invariable; the verb tracks whatever is being sold, built, or spoken about.
| Patient is singular | Patient is plural |
|---|---|
| Se vende piso. | Se venden pisos. |
| Se alquila habitación. | Se alquilan habitaciones. |
| Se necesita camarero. | Se necesitan camareros. |
| Se construirá un puente nuevo. | Se construirán dos puentes nuevos. |
| Se habla español. | Se hablan español, inglés y francés. |
The agreement is genuinely sensitive: if the patient changes from singular to plural between two clauses, the verb must change with it.
Se vendió una casa el mes pasado, pero este mes se han vendido cinco.
One house was sold last month, but this month five have been sold.
Aquí se sirve un café excelente y se preparan tostadas a cualquier hora.
They serve excellent coffee here and toast is made at any hour.
Where the pasiva refleja lives: registers and text types
This construction is not a stylistic curiosity — it is the dominant passive of everyday peninsular Spanish. You will see it everywhere:
- Classified ads and shop signs: Se alquila, Se traspasa, Se vende, Se busca, Se necesita personal.
- Recipes: Se pelan las patatas, se cortan en rodajas finas y se fríen en aceite caliente. The whole genre of recipe-writing in Spanish runs on this construction.
- Instructions and manuals: Se retira la tapa, se introduce la pila y se cierra de nuevo. Compare English "Remove the lid, insert the battery..." — imperative — versus Spanish's preference for the impersonal se.
- Journalistic Spanish: headlines like Se aprueba la nueva ley de vivienda; news leads like Se ha detenido a tres sospechosos.
- Academic and technical prose: En este estudio se analizan los datos recogidos entre 2015 y 2020.
- Public signs and laws: Se prohíbe fumar, No se admiten devoluciones, Se ruega silencio.
Se pelan las patatas, se cortan en dados pequeños y se sofríen con un poco de cebolla.
Peel the potatoes, cut them into small cubes and lightly fry them with some onion. (recipe)
Según el informe, se han recuperado más de mil empleos en el sector turístico.
According to the report, more than a thousand jobs have been recovered in the tourism sector.
Se ruega no hacer ruido después de las once de la noche.
Please do not make noise after eleven at night. (sign in a building)
The patient is always non-human (or close to it)
The pasiva refleja works smoothly when the patient — the grammatical subject — is a thing, an idea, an animal, or some abstract entity. Casas, idiomas, un puente, una ley, tres sospechosos (as a non-specific group). What you almost never see in real peninsular Spanish is a pasiva refleja with a specific, definite human as the patient.
If the patient is a definite human — a named person, a specific known group — Spanish switches strategies. It moves to the impersonal se construction with personal a: Se busca a Juan, Se detuvo al sospechoso. We will come back to this in the next section, because it is the single biggest source of confusion between the pasiva refleja and the impersonal se.
Se venden coches usados en el polígono industrial.
Used cars are sold at the industrial estate. (patient = coches, non-human, plural verb)
Se busca a los responsables del incendio.
The people responsible for the fire are being sought. (definite human patient — impersonal se construction with personal a, singular verb)
Notice that the second sentence is not se buscan los responsables with plural agreement. The presence of personal a and a definite human object kicks the sentence out of pasiva refleja territory and into impersonal se, where the verb stays singular and los responsables is no longer the grammatical subject — it is a direct object. The next page on this list (impersonal se: se vive bien aquí) covers that construction in full.
How it differs from the ser-passive
English passives map onto two different Spanish constructions, and learners need to develop intuition about which to reach for. Compare:
| English passive | Spanish ser-passive (formal/written) | Spanish pasiva refleja (everyday) |
|---|---|---|
| The house was sold. | La casa fue vendida. | Se vendió la casa. |
| The bridge will be built next year. | El puente será construido el año que viene. | Se construirá el puente el año que viene. |
| Three languages are spoken here. | Tres idiomas son hablados aquí. (awkward) | Aquí se hablan tres idiomas. |
The ser-passive is grammatically correct in all three rows, but in the third row it sounds bookish to the point of artificiality. In a shop-window or in spoken Spanish the pasiva refleja is the only natural option. Rule of thumb: if the agent does not appear with por, the pasiva refleja is almost always the better choice in peninsular Spanish.
Tense, mood, and aspect: it works everywhere
The pasiva refleja is not limited to the present. Any tense or mood that allows a third-person form allows this construction.
| Tense / mood | Singular patient | Plural patient |
|---|---|---|
| Presente | Se vende piso. | Se venden pisos. |
| Pretérito | Se vendió la casa. | Se vendieron las casas. |
| Imperfecto | Se vendía mucho vino entonces. | Se vendían muchos vinos entonces. |
| Futuro | Se construirá un puente. | Se construirán dos puentes. |
| Pretérito perfecto | Se ha vendido el cuadro. | Se han vendido los cuadros. |
| Subjuntivo presente | Quiero que se publique el artículo. | Quiero que se publiquen los artículos. |
| Condicional | Se vendería mejor con descuento. | Se venderían mejor con descuento. |
En el siglo pasado se construían las casas con piedra y madera.
In the last century houses were built with stone and wood.
Espero que se publiquen pronto los resultados del estudio.
I hope the study's results are published soon.
Telling pasiva refleja apart from impersonal se
This is the trap that catches every learner. Both constructions begin with se + a 3rd-person verb. The difference is whether the verb agrees with a patient or stays singular.
| Pasiva refleja | Impersonal se | |
|---|---|---|
| Patient (grammatical subject)? | Yes — a thing. | No, or definite human (direct object with personal a). |
| Verb number | Agrees with patient (singular or plural). | Always singular. |
| Example singular | Se vende piso. | Aquí se vive bien. |
| Example plural | Se venden pisos. | Se busca a los testigos. (not se buscan) |
Quick test: try replacing se with a passive in English. "Pisos are sold" works → pasiva refleja, verb plural. "One lives well here" / "They live well here" is what you reach for → impersonal se, verb singular. Cross-link to Se impersonal: se vive bien aquí for the full treatment.
Common Mistakes
❌ Se vende casas en el centro.
Incorrect — patient (casas) is plural, verb must be plural.
✅ Se venden casas en el centro.
Houses are sold in the centre.
This is the number-one mistake. English speakers (and learners coming from Latin American Spanish where this rule has eroded in some dialects) leave the verb singular regardless of the patient. In standard peninsular Spanish the verb must agree with the patient. Se vende casas sounds wrong to a Spanish ear the way the houses is for sale sounds wrong in English.
❌ Las casas son vendidas en el centro.
Grammatically possible but unnatural — the ser-passive without a named agent.
✅ Se venden casas en el centro.
Houses are sold in the centre.
Trying to translate the English passive word-for-word with ser + participle. The construction is grammatical but in everyday peninsular Spanish it sounds bookish or imported. When no agent is named, the pasiva refleja is the natural choice.
❌ Se buscan los testigos del accidente.
Incorrect for a definite human group — needs personal a and singular verb.
✅ Se busca a los testigos del accidente.
The witnesses of the accident are being sought.
When the patient is a definite, identifiable human or group of humans, Spanish forces the impersonal se construction with personal a and a singular verb. Treating definite humans as ordinary grammatical subjects of a pasiva refleja sounds wrong.
❌ El año pasado se vendió muchas casas.
Incorrect — patient is plural muchas casas, verb must be vendieron.
✅ El año pasado se vendieron muchas casas.
Many houses were sold last year.
The temptation is to treat se as a fixed singular subject, but se has no number — it is the patient that drives agreement.
❌ Se vende coches usados, pero se alquila pisos amueblados.
Incorrect — both patients are plural, both verbs need plural.
✅ Se venden coches usados, pero se alquilan pisos amueblados.
Used cars are sold, but furnished flats are rented.
A sentence with two coordinated pasiva refleja clauses must agree consistently. Mismatched agreement (one singular, one plural where both patients are plural) is a classic learner slip.
Key Takeaways
- Form: se
- 3rd-person verb + patient (the thing being acted on).
- Agreement: the verb agrees in number with the patient. Se venden casas (plural), se vende una casa (singular).
- No agent: the construction is used precisely because the agent is unknown or irrelevant. If you need to name the agent (por Cervantes), switch to the ser-passive.
- Patients are typically non-human. Definite human patients trigger the impersonal se construction with personal a and a singular verb instead.
- Register: dominant in signs, ads, recipes, instructions, journalism, and academic prose. Far more common than the ser-passive in everyday peninsular Spanish.
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Start learning Spanish→Related Topics
- Se impersonal: se vive bien aquíB1 — The impersonal se construction — se + always-singular verb — used for generic, agent-less statements where English reaches for 'one,' 'you,' 'they,' or 'people.' The default way to make a generalization in peninsular Spanish.
- Pasiva con ser: el libro fue escritoB1 — The full ser-passive: ser in any tense + past participle agreeing with the subject + optional por + agent. Register: formal, written, journalistic.
- Voz activa y voz pasivaB1 — What the passive voice is, when Spanish uses it, and why Spanish prefers active alternatives or the se-passive far more often than English does.
- Restricciones de la pasiva con serB2 — Why the ser-passive is much less freely available in Spanish than the English passive is in English — the verbs that reject it, the aspects that block it, and what Spanish reaches for instead.
- Los muchos usos de 'se'B2 — Spanish 'se' wears at least eight different hats — reflexive, reciprocal, pseudoreflexive, le-to-se substitute, passive, impersonal, accidental, and intensifier. This page maps the whole territory.