móc — can, be able | Polish Grammar

Móc is the everyday verb for can / be able / may — situational possibility, permission, and (in the conditional) polite requests. It is irregular in two famous ways, and both traps are orthographic: the present alternates g with ż (mogę but możesz), and the past swaps ó for o while dropping a vowel in the masculine (mógł "he could" vs mogła "she could"). Get those two alternations right and the rest of móc falls into place. It is imperfective only; the "managed to" notions live in separate verbs (potrafić, zdołać, dać radę).

Present tense — the g / ż alternation

Person	Form	English
ja	mogę	I can
ty	możesz	you can
on / ona / ono	może	he / she / it can
my	możemy	we can
wy	możecie	you (pl.) can
oni / one	mogą	they can

The pattern is sharp: the outer two forms — mogę (1sg) and mogą (3pl) — keep the hard g; everything in between softens to ż: możesz, może, możemy, możecie. That is the historic "first/third-plural keep the velar, the rest palatalise" pattern. Distinguish the two g-forms by their nasal vowel, exactly as with będę / będą: mogę (-ę, "I"), mogą (-ą, "they").

Mogę ci jakoś pomóc?

Can I help you somehow?

Niestety nie możemy dzisiaj przyjść.

Unfortunately we can't come today.

Oni mogą poczekać na zewnątrz.

They can wait outside.

Past tense — the ó↔o drop

This is the alternation that catches everyone. The masculine singular is mógł (with ó and a dropped vowel before the ł), while every other form has plain o and no drop:

Subject	Past form	English
ja (m. / f.)	mogłem / mogłam	I could
ty (m. / f.)	mogłeś / mogłaś	you could
on	mógł	he could
ona	mogła	she could
ono	mogło	it could
my (vir. / non-vir.)	mogliśmy / mogłyśmy	we could
wy (vir. / non-vir.)	mogliście / mogłyście	you (pl.) could
oni / one	mogli / mogły	they could

Look only at on: mógł — that ó appears exclusively in this masculine singular form. The moment you add any ending (feminine -a, neuter -o, the -em / -am of "I"), the vowel goes back to o and the dropped vowel reappears: mógł but mogła, mogło, mogłem, mogli. So "he could" (mógł) and "she could" (mogła) genuinely look like two different words — that visual gap is the single most common spelling error with this verb.

Nie mógł zasnąć przez całą noc.

He couldn't fall asleep all night. (on → mógł)

Mogła zostać dłużej, ale nie chciała.

She could have stayed longer, but she didn't want to. (ona → mogła)

Wczoraj nie mogliśmy się dodzwonić.

Yesterday we couldn't get through on the phone. (my, virile → mogli-)

Future

Móc is imperfective, so its future is the compound imperfective future: będę mógł / mogła, będziesz mógł / mogła, and so on — the będę set plus the gendered past participle:

W przyszłym tygodniu będę mógł ci to wytłumaczyć.

Next week I'll be able to explain it to you. (man speaking)

Po remoncie będziemy mogli znowu korzystać z balkonu.

After the renovation we'll be able to use the balcony again.

(You may also hear będę móc with the infinitive; both are acceptable, with the participle form more common.)

Imperative — there isn't one in practice

Móc has no everyday imperative. You cannot command someone to be able to do something. Where English bends "can" into a request, Polish reaches for other tools: the conditional (mógłbyś? "could you?"), the impersonal niech ("let…"), or simply a different verb. A textbook form móż exists but is effectively never used.

Niech pani usiądzie, proszę.

Please take a seat, madam. (niech replaces a 'can' imperative)

Conditional — the polite-request workhorse

The conditional of móc is where the verb earns its keep socially. Mógłbym / mogłabym softens a statement to "I could / I'd be able," and the second person mógłbyś / mogłabyś is the standard polite way to ask a favour — far gentler than a bare imperative:

Subject	Conditional	English
ja (m. / f.)	mógłbym / mogłabym	I could / would be able
ty (m. / f.)	mógłbyś / mogłabyś	you could
on / ona	mógłby / mogłaby	he / she could
my (vir.)	moglibyśmy	we could
wy (vir.)	moglibyście	you (pl.) could
oni / one	mogliby / mogłyby	they could

Notice the same ó↔o behaviour carries into the conditional: mógłbym (the masculine keeps ó before the -ł-) versus mogłabym (feminine, plain o).

Mógłbyś otworzyć okno? Jest strasznie duszno.

Could you open the window? It's terribly stuffy. (asking a man)

Czy mogłaby pani powtórzyć adres?

Could you repeat the address, madam? (formal, to a woman)

Moglibyśmy spotkać się jutro zamiast dziś?

Could we meet tomorrow instead of today?

💡

For requests, climb the politeness ladder: Możesz…? ("Can you…?", neutral/familiar) → Czy możesz…? (a touch more polite) → Mógłbyś…? / Mogłabyś…? (the standard polite favour) → Czy mógłby pan / mogłaby pani…? (formal). The conditional mógłbyś is the everyday sweet spot.

Usage: ability, permission, possibility

Móc always takes a bare infinitive and covers three overlapping senses:

Situational ability — being in a position to do something (circumstances permit): Mogę dziś wyjść wcześniej.
Permission — may I?: Czy mogę otworzyć okno?
Possibility / guess — might, may be: To może być prawda.

Możesz palić na balkonie, nie w środku.

You can/may smoke on the balcony, not inside. (permission)

Pociąg może być spóźniony, sprawdź rozkład.

The train might be late, check the timetable. (possibility)

💡

Móc is imperfective only — it has no perfective partner, so it cannot itself express "managed to." For the one-off success sense ("I was able to / I managed to"), Polish reaches for separate verbs: udało mi się ("I succeeded in"), zdołałem ("I managed"), or dałem radę ("I coped"). Mogłem tells you the possibility existed; udało mi się tells you it actually came off.

móc vs umieć — situational "can" vs a learned skill

This is the distinction English hides under one word. Móc is situational — whether circumstances allow it right now. Umieć is a learned skill — whether you know how. "I can swim" is umiem pływać (I have the skill); "I can't swim today, my shoulder hurts" is nie mogę dziś pływać (circumstances forbid it):

Umiem pływać, ale dziś nie mogę — boli mnie ramię.

I can swim, but today I can't — my shoulder hurts. (skill vs circumstance)

On umie gotować, więc może ugotować obiad.

He can cook (knows how), so he can make dinner (is able to).

There is also the impersonal można ("one can / it's allowed"), handy when there is no specific subject: Tu można parkować "You can park here." For the full three-way map, see móc vs umieć vs można and the modality page.

Common Mistakes

❌ Ja mogesz mu pomóc.

Incorrect — the 1sg is mogę (hard g), not the soft-stem 'mog-' of other persons.

✅ Mogę mu pomóc.

I can help him.

❌ On nie mogł przyjść.

Incorrect — the masculine singular is mógł, with ó.

✅ On nie mógł przyjść.

He couldn't come.

❌ Ona mógła zostać dłużej.

Incorrect — the ó belongs only to the masculine mógł; the feminine is mogła.

✅ Ona mogła zostać dłużej.

She could have stayed longer.

❌ Mogę pływać od dziecka.

Incorrect — a learned skill is umieć, not móc; móc is situational ability.

✅ Umiem pływać od dziecka.

I've been able to swim since I was a child.

❌ Możesz mi pomóc? — said to a stranger you want to be polite to

Too blunt for a polite request; the conditional softens it.

✅ Mógłbyś mi pomóc?

Could you help me? (polite, addressing a man)

Key Takeaways

Present: mogę, możesz, może, możemy, możecie, mogą — hard g only in mogę (1sg) and mogą (3pl); soft ż everywhere else.
Past: mógł (he, with ó) but mogła, mogło, mogłem, mogli, mogły (plain o). The ó lives in the masculine singular alone.
Future: compound będę mógł / mogła…; no real imperative — use niech or the conditional.
Conditional mógłbym / mogłabym, and especially mógłbyś / mogłabyś, is the standard polite request.
Móc = situational can / may / might (+ infinitive); umieć = a learned skill; można = impersonal "one can."

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