This page covers the aspect pair wierzyć (imperfective) / uwierzyć (perfective), "to believe." The grammar to master here is the split government: wierzyć + dative means "believe / trust someone" (wierzę ci, "I believe you"), while wierzyć w + accusative means "believe in — in the existence or value of — something" (wierzę w ciebie, "I believe in you"). English uses the single verb "believe" for both, so this distinction — trust versus faith — is invisible to an English speaker until they learn it.
What this verb means
Wierzyć / uwierzyć covers three constructions:
- wierzyć komuś (+ dative) — to believe / trust a person, to take their word as true.
- wierzyć w coś / w kogoś (+ w + accusative) — to believe in the existence of, or to have faith/confidence in.
- wierzyć, że... — to believe that (a clause).
Wierzę ci, naprawdę.
I believe you, really.
Od dziecka wierzy w duchy.
She's believed in ghosts since childhood.
Present tense (imperfective wierzyć)
Wierzyć is a regular -ę / -isz verb. Like all verbs of this class, the spelling reflects the soft rz; nothing alternates.
| Person | Form | English |
|---|---|---|
| ja | wierzę | I believe |
| ty | wierzysz | you believe |
| on / ona / ono | wierzy | he / she / it believes |
| my | wierzymy | we believe |
| wy | wierzycie | you (pl.) believe |
| oni / one | wierzą | they believe |
The imperfective is the default for a held, ongoing belief — most uses of "I believe" in the present are wierzę, because believing is a state, not a one-off event.
Nie wierzę w przypadki.
I don't believe in coincidences.
Perfective future (uwierzyć)
The perfective uwierzyć adds the prefix u- and means "to come to believe, to become convinced." Its conjugation is identical to the imperfective except for that prefix.
| Person | Form | English |
|---|---|---|
| ja | uwierzę | I will believe / come to believe |
| ty | uwierzysz | you will believe |
| on / ona / ono | uwierzy | he / she / it will believe |
| my | uwierzymy | we will believe |
| wy | uwierzycie | you (pl.) will believe |
| oni / one | uwierzą | they will believe |
Kiedy zobaczysz to na własne oczy, uwierzysz mi.
When you see it with your own eyes, you'll believe me.
Nie mogę uwierzyć, że to już piątek!
I can't believe it's Friday already!
Past tense (gendered)
| Imperfective (wierzyć) | Perfective (uwierzyć) | |
|---|---|---|
| ja (m.) | wierzyłem | uwierzyłem |
| ja (f.) | wierzyłam | uwierzyłam |
| ty (m.) | wierzyłeś | uwierzyłeś |
| ty (f.) | wierzyłaś | uwierzyłaś |
| on | wierzył | uwierzył |
| ona | wierzyła | uwierzyła |
| ono | wierzyło | uwierzyło |
| my (masc.-pers.) | wierzyliśmy | uwierzyliśmy |
| my (non-m.-pers.) | wierzyłyśmy | uwierzyłyśmy |
| wy (masc.-pers.) | wierzyliście | uwierzyliście |
| wy (non-m.-pers.) | wierzyłyście | uwierzyłyście |
| oni | wierzyli | uwierzyli |
| one | wierzyły | uwierzyły |
Długo nie wierzyłam w siebie, ale to się zmieniło.
For a long time I didn't believe in myself, but that's changed.
Nikt mu nie uwierzył, choć mówił prawdę.
Nobody believed him, even though he was telling the truth.
Imperative
The perfective uwierz! is the everyday command ("believe it / trust me on this"); the imperfective wierz! appears in fixed encouragements like wierz mi ("believe me").
| Person | Perfective (uwierzyć) | Imperfective (wierzyć) |
|---|---|---|
| ty | uwierz! | wierz! |
| my | uwierzmy! | wierzmy! |
| wy | uwierzcie! | wierzcie! |
Uwierz mi, wcale nie żartuję.
Believe me, I'm not joking at all.
Wierz w siebie — dasz radę.
Believe in yourself — you can do it.
Conditional
| Person | Form (imperfective) | English |
|---|---|---|
| ja (m. / f.) | wierzyłbym / wierzyłabym | I would believe |
| ty (m. / f.) | wierzyłbyś / wierzyłabyś | you would believe |
| on / ona | wierzyłby / wierzyłaby | he / she would believe |
| my (m.-pers. / non-) | wierzylibyśmy / wierzyłybyśmy | we would believe |
| oni / one | wierzyliby / wierzyłyby | they would believe |
Nie uwierzyłbyś, kogo dziś spotkałem.
You wouldn't believe who I ran into today.
Participles and verbal adverb
The imperfective gives the contemporary adverbial participle wierząc ("believing, while believing") and the active adjectival participle wierzący ("believing, a believer"). The latter is common as a noun-like adjective: osoba wierząca ("a religious / believing person"), often shortened to wierzący / wierząca. The perfective gives the literary uwierzywszy ("having believed").
Czy jesteś osobą wierzącą?
Are you a religious person?
Government: the heart of this verb
Here is the split that English flattens. The complement determines the meaning:
- wierzyć + dative (komuś) = "believe / trust someone" — to accept that what they say is true. Wierzę ci ("I believe you"), Nie wierzę mu ("I don't believe him"), Wierz lekarzom ("Trust the doctors").
- wierzyć w + accusative (w coś / w kogoś) = "believe in" — in the existence of, or have faith/confidence in. Wierzę w Boga ("I believe in God"), Wierzę w ciebie ("I believe in you"), Wierzę w sukces ("I believe in success").
- wierzyć, że... = "believe that..." — for a full proposition. Wierzę, że się uda ("I believe it'll work out").
The minimal pair is the most striking demonstration: Wierzę ci (dative) = "I take your word as true." Wierzę w ciebie (w + accusative) = "I have faith in your abilities." Same English verb, two different Polish structures encoding trust versus faith.
Wierzę ci na słowo.
I'll take your word for it.
Trener powiedział, że wierzy w nas.
The coach said he believes in us.
Nie wierzę w to, co piszą gazety.
I don't believe what the newspapers write.
wierzyć vs. myśleć / uważać
Wierzyć is not the verb for ordinary opinions. English "I believe he's right" (= "I think") is myślę / uważam, not wierzę. Use wierzyć only for trust, faith, and conviction; use myśleć / uważać for opinions and reasoning. See verbs-reference/myslec.
Myślę, że masz rację (not: Wierzę, że masz rację).
I think you're right.
Common Mistakes
❌ Wierzę cię.
Incorrect — believing a person takes the dative, not accusative
✅ Wierzę ci.
I believe you.
❌ Wierzę w ciebie (meaning: I believe what you're saying).
Incorrect structure for that meaning — w + accusative is 'have faith in'
✅ Wierzę ci.
I believe you (what you say).
❌ Wierzę Boga.
Incorrect — 'believe in God' needs w + accusative
✅ Wierzę w Boga.
I believe in God.
❌ Wierzę, że to dobry pomysł (as a casual opinion).
Wrong verb for an opinion — use myśleć/uważać
✅ Uważam, że to dobry pomysł.
I think it's a good idea.
❌ Nie mogę w to wierzyć!
Wrong aspect — the 'I can't believe it' reaction is perfective
✅ Nie mogę w to uwierzyć!
I can't believe it!
Key Takeaways
- Present: wierzę, wierzysz, wierzy, wierzymy, wierzycie, wierzą; perfective future adds u-: uwierzę...
- wierzyć + dative = trust a person (wierzę ci); wierzyć w + accusative = believe in / have faith (wierzę w ciebie, w Boga).
- For opinions, use myśleć / uważać, not wierzyć.
- The "I can't believe it!" reaction is perfective: Nie mogę w to uwierzyć!
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