Few Polish verbs work as hard as zostać and its imperfective partner zostawać. The pair does three jobs that English keeps strictly apart: it means "become" (and like być, it puts the new status in the instrumental — został prezydentem "he became president"); it means "stay / remain / be left over" (zostań tu! "stay here"; zostało mało czasu "little time is left"); and it is the auxiliary of the dynamic passive (list został wysłany "the letter was sent"). The unifying idea is change and what is left after it — zostać is the perfective counterpart to być for transitions, and the engine that turns an action into a passive event.
The aspect pair at a glance
| Imperfective | Perfective | |
|---|---|---|
| Infinitive | zostawać | zostać |
| Meaning of the action | be becoming / be staying (process, repetition) | become / stay / be left (single completed event) |
| Present tense | zostaję, zostajesz… (a real present) | — (perfectives have no present) |
| Simple future | — (uses będę + zostawać) | zostanę, zostaniesz… (future meaning) |
As with every Polish aspect pair, the perfective zostać has no present tense: its present-looking forms (zostanę, zostaniesz) carry future meaning. The imperfective zostawać is the one with a genuine present (zostaję). Keep that split in mind as you read the tables below.
zostać (perfective) — full paradigm
The perfective is the form you will reach for most: a finished change ("became"), a completed staying ("stayed"), or the passive ("was done").
| Person | Future (perfective) | English |
|---|---|---|
| ja | zostanę | I will become / stay |
| ty | zostaniesz | you will become / stay |
| on / ona / ono | zostanie | he / she / it will become / stay |
| my | zostaniemy | we will become / stay |
| wy | zostaniecie | you (pl.) will become / stay |
| oni / one | zostaną | they will become / stay |
Note zostanę (-ę, "I") versus zostaną (-ą, "they") — one nasal vowel apart, exactly like będę / będą.
The past of a perfective is its most common use, because a completed change is usually being reported after the fact. Polish past tense agrees in gender and number:
| Subject | Past form | English |
|---|---|---|
| ja (m. / f.) | zostałem / zostałam | I became / stayed |
| ty (m. / f.) | zostałeś / zostałaś | you became / stayed |
| on / ona / ono | został / została / zostało | he / she / it became / stayed |
| my (vir. / non-vir.) | zostaliśmy / zostałyśmy | we became / stayed |
| wy (vir. / non-vir.) | zostaliście / zostałyście | you (pl.) became / stayed |
| oni / one | zostali / zostały | they became / stayed |
The masculine-personal (virile) plural is zostali (the men/mixed-group form), against the non-virile zostały (women, things, animals) — the same -li / -ły split that runs through the whole past tense.
Imperative — the perfective imperative is the natural "do it now" command, very common with this verb:
| Person | Form | English |
|---|---|---|
| ty | zostań! | stay! / remain! |
| my | zostańmy | let's stay |
| wy | zostańcie | stay! (pl.) |
Conditional: zostałbym / zostałabym ("I would become / stay"), built by adding the clitic -by- plus the personal ending to the past participle: zostałbym, zostałabyś, zostałby, zostalibyśmy…
zostawać (imperfective) — full paradigm
The imperfective describes the process of becoming or staying, or a habitual / repeated one. Its hallmark is the genuine present in -aję:
| Person | Present (imperfective) | English |
|---|---|---|
| ja | zostaję | I am becoming / staying |
| ty | zostajesz | you are becoming / staying |
| on / ona / ono | zostaje | he / she / it is becoming / staying |
| my | zostajemy | we are becoming / staying |
| wy | zostajecie | you (pl.) are becoming / staying |
| oni / one | zostają | they are becoming / staying |
Past (imperfective): zostawałem / zostawałam, zostawał / zostawała, plural zostawali / zostawały. Its future is the regular imperfective compound: będę zostawać (or będę zostawał / zostawała). Imperative: zostawaj (less common; the perfective zostań dominates).
Job 1 — "become" (+ instrumental)
This is zostać's deepest tie to być. Just as być takes a predicate noun in the instrumental (jestem nauczycielem "I am a teacher"), zostać marks the new status in the instrumental — it is the change-of-state partner to być:
Po studiach został nauczycielem w wiejskiej szkole.
After his studies he became a teacher at a village school. (nauczycielem = instrumental)
Chcę kiedyś zostać lekarką, jak moja mama.
One day I want to become a doctor, like my mum. (woman speaking, lekarką = instrumental)
Jak myślisz, kto zostanie nowym prezesem?
Who do you reckon will become the new chairman?
The same instrumental shows up with adjective-like roles and titles. Compare the static być with the dynamic zostać: jest dyrektorem "he is a director" → został dyrektorem "he became a director." For the full logic of the instrumental predicate, see the instrumental predicate page.
Job 2 — "stay / remain / be left over"
With no instrumental complement, zostać means physically or figuratively staying put, or — impersonally — being left over:
Zostań jeszcze chwilę, dopiero przyszłaś.
Stay a bit longer, you've only just got here. (woman addressed)
Dzieci zostały w domu z babcią.
The children stayed at home with grandma.
Zostało nam tylko dziesięć minut do pociągu.
We've only got ten minutes left until the train. (literally 'there stayed to us…')
W lodówce został jeden jogurt — zjedz go.
There's one yogurt left in the fridge — eat it.
The "left over" sense is impersonal and very frequent: zostało + a quantity, often with a dative person (zostało mi…, "I have… left"). Note the genitive that creeps in after small quantities and negation: nie zostało nic "nothing is left."
Job 3 — the dynamic (eventive) passive auxiliary
This is the job that makes zostać indispensable in formal Polish. Combined with a passive participle, zostać builds the eventive passive — the passive that reports an event ("the letter was sent"), as opposed to być + participle, which reports a state ("the letter is sent / is in a sent state"):
List został wysłany wczoraj wieczorem.
The letter was sent yesterday evening. (an event — zostać + participle)
Most został zbudowany w dwa lata.
The bridge was built in two years.
Sprawca zostanie ukarany.
The perpetrator will be punished. (future passive)
Decyzja została podjęta jednogłośnie.
The decision was taken unanimously.
The participle agrees with the subject in gender and number: list został wysłany (m.), paczka została wysłana (f.), listy zostały wysłane (pl.). Because zostać is perfective, this passive is intrinsically about a completed action; the imperfective process passive uses być + participle or a reflexive się construction. For the full być-vs-zostać passive contrast, see the passive voice page.
A note on negation and "won't be left"
Like other existential-flavoured uses, the "left over" sense pulls a genitive under negation, and the impersonal verb freezes in the singular neuter:
Nie zostało już mleka, muszę kupić.
There's no milk left, I have to buy some. (mleka = genitive)
Po imprezie nie zostało ani jednej czystej szklanki.
After the party not a single clean glass was left.
This parallels the nie ma / nie było / nie będzie genitive pattern; see the absence and nie ma page.
Don't confuse zostać with zostawić
Zostać ("become / stay / remain") is intransitive — nobody gets stayed. The look-alike zostawić / zostawiać ("to leave [something / someone] behind") is transitive and takes a direct object: zostawiłem klucze w domu "I left the keys at home." One letter of stem (the -w-) and a whole argument structure apart. See the zostawiać reference.
Zostałem w pracy do późna.
I stayed at work late. (zostać — I myself remained)
Zostawiłem teczkę w pracy.
I left my briefcase at work. (zostawić — I left an object behind)
Common Mistakes
❌ Został nauczyciel po studiach.
Incorrect — 'become' marks the new role in the instrumental, not the nominative.
✅ Został nauczycielem po studiach.
He became a teacher after his studies.
❌ Zostaję w domu jutro.
Incorrect — for a one-off future plan you need the perfective future zostanę, not the present zostaję.
✅ Zostanę w domu jutro.
I'll stay at home tomorrow.
❌ List był wysłany wczoraj o piątej.
Questionable — for a one-off completed event Polish prefers the eventive passive with zostać; być + participle reads as a state.
✅ List został wysłany wczoraj o piątej.
The letter was sent yesterday at five.
❌ Zostałem klucze w domu.
Incorrect — confusing zostać (stay) with zostawić (leave something); 'leave an object' needs zostawić + object.
✅ Zostawiłem klucze w domu.
I left the keys at home.
❌ Nie zostało mleko w lodówce.
Incorrect — under negation the leftover thing takes the genitive.
✅ Nie zostało mleka w lodówce.
There's no milk left in the fridge.
Key Takeaways
- zostać (pf) / zostawać (impf) — perfective future zostanę… zostaną; imperfective present zostaję… zostają. The perfective has no present; zostanę is future.
- Become
- instrumental (został lekarzem), mirroring być's predicate; stay / remain (zostań!, dzieci zostały); be left over (zostało mi mało czasu).
- The eventive passive: zostać + passive participle = an action that happened (został wysłany), versus być + participle = a resulting state.
- Under negation, the "left over" sense takes the genitive and freezes as singular nie zostało.
- Don't mix zostać (intransitive: stay/become) with zostawić (transitive: leave something behind).
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Start learning Polish→Related Topics
- być — to beA1 — Complete reference for być ('to be') — the most essential and most irregular Polish verb: full present, past (by gender), future, imperative, conditional and verbal-adverb tables, plus its three predicate patterns.
- Instrumental as Predicate (Jestem nauczycielem)A2 — Why 'I am a teacher' is jestem nauczycielem (instrumental) — the predicate noun after być, zostać and okazać się — and why a predicate adjective (jestem zmęczony) stays nominative.
- 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.
- zostawiać / zostawić — to leave (behind)B1 — Full conjugation of zostawiać / zostawić ('to leave something/someone behind'): imperfective present zostawiam/zostawiasz…/zostawiają (-am/-asz class), perfective future zostawię/zostawisz…/zostawią, past zostawił, imperative zostaw!, and the crucial split — zostawić (leave a thing behind, + accusative) vs wyjść/wychodzić (leave = depart from a place).
- Genitive of Absence: nie ma, brak, nie byłoA2 — How Polish says 'there is no X' — the frozen nie ma / nie było / nie będzie plus the genitive, and the brakować construction.