Polish has not one passive but a whole family of agent-defocusing constructions, and an advanced writer chooses among them deliberately. English collapses most of this into a single "be + past participle" (the bridge was built), so the choices feel invisible to learners. This page lays out all five strategies side by side and gives you the axes — register, aspect, whether there is a grammatical subject, whether the agent can be named — on which they differ. Treat the grid below as your mastery reference; the sections that follow explain each row.
The comparison grid
| Construction | Example | Register | Aspect | Has subject? | Agent expressible? |
|---|---|---|---|---|---|
| Generic oni ("they") | Zbudowali nowy most. | neutral / spoken | either | yes (covert "they") | no (deliberately vague) |
| się-passive / impersonal | Mosty buduje się szybko. | neutral, leans spoken | either | sometimes (promoted object) | no |
być
| Most jest zbudowany. | neutral / written | imperfective state | yes | rarely |
zostać
| Most został zbudowany. | neutral / written / formal | perfective event | yes | yes (przez + acc.) |
| -no/-to impersonal past | Zbudowano most. | written, formal, narrative | perfective (mostly) | no | no |
| trzeba/można/należy | Trzeba zbudować most. | varies | via infinitive | no | no |
1. Generic "they": the spoken default
The simplest way to background an agent is to use third-person plural with no stated subject. Zbudowali most literally is "they built a bridge," but with no antecedent "they" it means "the bridge got built / someone built the bridge." This is overwhelmingly the spoken choice.
Zamknęli sklep na remont.
They've closed the shop for renovation. (= the shop has been closed)
Mówią, że zima będzie ostra.
They say the winter will be harsh. (= it's said that…)
The agent is deliberately vague; you cannot then add "by the workers" — that would force you back into a real subject. Register: neutral, but markedly colloquial in flavour. You would not write it in a formal report.
2. The się-passive / impersonal
The reflexive się construction defocuses the agent while keeping the verb active in form. Two sub-uses matter. With a promoted object it behaves like a passive — the patient becomes the grammatical subject and the verb agrees with it:
Tutaj sprzedaje się świeży chleb.
Fresh bread is sold here.
Te książki dobrze się sprzedają.
These books sell well.
In the second, książki is the subject and the verb is plural to agree. With no promotable object, się gives a purely impersonal "one does X / people do X," and the verb stays third-person singular:
W Polsce dużo się czyta.
In Poland people read a lot.
Jak się tam dostać?
How does one get there?
Register: neutral but leaning spoken and general-statement-ish. It is the natural choice for recipes, instructions and rules of thumb. The agent is never expressible.
3. być + participle versus zostać + participle: state versus event
This is the pair English speakers most often blur, because English "was built" hides the difference. Polish forces a choice between a state and an event.
być + passive participle describes a resulting state — how things are. It is imperfective in feel and answers "what condition is it in?"
Drzwi są zamknięte.
The door is closed. (it's in a closed state)
List był już napisany, kiedy przyszedłem.
The letter was already written when I arrived. (a state, the writing was done)
zostać + passive participle describes the event of the change happening — the moment it became so. It is perfective and answers "what happened to it?" This is the construction that most closely matches the English dynamic passive, and it is the one that readily takes an agent with przez + accusative.
Drzwi zostały zamknięte przez dozorcę.
The door was closed by the caretaker. (the event of closing)
Ustawa została przyjęta przez Sejm.
The bill was passed by the Sejm. (formal, eventive, with agent)
The contrast is sharp: Most jest zbudowany says the bridge stands finished (state); Most został zbudowany says the bridge was built / got built (event). Choose zostać when the change of state is the point, when you want to date it, or when you want to name the agent; choose być when the resulting condition is the point.
4. The -no/-to impersonal past: agentless and accusative-keeping
The -no/-to form is a uniquely Slavic impersonal that English has no analogue for. It is built from the passive participle stem plus -no (or -to for certain verb classes) and means "one did / it was done," with no grammatical subject at all and — crucially — it keeps the object in the accusative rather than promoting it. Compare:
Zbudowano nowy most.
A new bridge was built. (someone built a new bridge)
Otwarto wystawę w piątek.
The exhibition was opened on Friday.
Note most and wystawę stay accusative — they are still grammatical objects, even though there is no subject. This is the signature of -no/-to: subjectless, transitive, accusative object retained. It is also strongly perfective and past in orientation, and it carries a distinctly formal, written, often historical-narrative register. Newspapers, official notices, and historiography love it.
W 1410 roku pokonano Krzyżaków pod Grunwaldem.
In 1410 the Teutonic Knights were defeated at Grunwald.
The agent can never be named — adding przez to a -no/-to form is ungrammatical. If you need the agent, switch to zostać + participle.
Postanowiono podnieść podatki.
It was decided to raise taxes.
5. trzeba / można / należy: when the construction shifts to modality
The last family is not strictly passive — these impersonal modals defocus the agent and add a modal colour. They are subjectless and take a bare infinitive. The dative can name who is affected, but there is no nominative subject.
- trzeba — "one must / it is necessary" (necessity)
- można — "one may / it is possible" (possibility, permission)
- należy — "one should / one is to" (prescriptive obligation, formal)
- wypada — "it is fitting / proper" (social propriety)
Trzeba zbudować nowy most.
A new bridge needs to be built.
Tu można palić?
Can one smoke here? / Is smoking allowed here?
Należy zachować ostrożność.
One should exercise caution. (formal notices, instructions)
These shift the meaning from "X was done" to "X must/may/should be done." They are the register-sensitive choice for rules and recommendations: należy is bureaucratic-prescriptive, trzeba is everyday-necessity, można is permission.
Choosing among them: a decision path
- Do you want to name the agent (by X)? → only zostać
- participle can (with przez).
- Is it a formal written narrative of a completed act, agent irrelevant? → -no/-to (Zbudowano most).
- Is it a resulting state, not an event? → być
- participle (Most jest zbudowany).
- Is it a general truth, rule, or instruction? → się (Chleb sprzedaje się tutaj).
- Is it really obligation/permission? → trzeba/można/należy.
- Casual speech, agent just vague? → generic oni (Zbudowali most).
Common Mistakes
❌ Most jest zbudowany przez robotników (meaning: the workers built it, the event).
Incorrect — the eventive agent-passive needs zostać, not być.
✅ Most został zbudowany przez robotników.
The bridge was built by the workers.
❌ Zbudowano most przez miasto.
Incorrect — -no/-to can never take a przez-agent.
✅ Most został zbudowany przez miasto. / Miasto zbudowało most.
The bridge was built by the city.
❌ Zbudowano nowy most (with most in nominative as if a subject).
Incorrect — -no/-to keeps the accusative object; it has no subject.
✅ Zbudowano nowy most. (most = accusative object)
A new bridge was built.
❌ W liście oficjalnym: Zamknęli drogę z powodu remontu.
Incorrect register — generic 'oni' is too colloquial for an official notice.
✅ Drogę zamknięto z powodu remontu. / Droga została zamknięta…
The road was closed due to roadworks.
❌ Tu się można palić.
Incorrect — można is already impersonal; adding się is redundant.
✅ Tu można palić.
One may smoke here.
Key Takeaways
- Polish backgrounds the agent in at least five ways; they differ by register, aspect, whether there is a subject, and whether the agent can be named.
- zostać
- participle is the eventive passive and the only one that names the agent (przez
- acc.).
- participle is the eventive passive and the only one that names the agent (przez
- być
- participle is the stative "is in X condition."
- -no/-to is subjectless, keeps the accusative object, is formal/written, and cannot take an agent.
- się suits general truths and instructions; generic oni suits casual speech.
- trzeba/można/należy are not passives but agentless modals — choose them when the meaning is really obligation or permission.
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Start learning Polish→Related Topics
- The Passive Voice: być and zostać + ParticipleB2 — Polish builds the passive with być (resulting state) or zostać (the event of becoming) plus a passive participle — a state-vs-event split English 'was' hides — with the agent in przez + accusative.
- The -no/-to Impersonal PastC1 — Polish's distinctively subjectless past form — zbudowano, znaleziono, otwarto — a frozen verb with no subject and no agent that keeps its object in the accusative, and is the voice of news, history and reports.
- Impersonal się and the się-PassiveB2 — The everyday Polish way to say 'one does / you do / people do' without a subject — the impersonal się of signs, rules and generalisations, plus the się-passive for backgrounding the agent.
- Choosing a Passive/Impersonal StrategyC1 — The full register-graded menu for backgrounding an agent in Polish — być/zostać + participle, the się-passive, the -no/-to impersonal past, and trzeba/można — and which one is idiomatic where an English speaker would reach for the be-passive.