Infinitive (imperfective): купа́тися — "to bathe (oneself), to take a bath, to swim (for pleasure)" Perfective partners: ви́купатися "to have a (good) bath" (prefix-stressed) and скупа́тися "to take a quick dip / bathe" Type: a true reflexive -ся verb — the action turns back on the subject (you bathe yourself)
купа́тися is the everyday verb for getting into water on purpose — a bath, the sea, a river, a lake. It is a clean example of a true reflexive: the -ся is the old reflexive pronoun "oneself," so купа́тися literally means "to bathe oneself." Strip the -ся and you get купа́ти "to bathe someone else" — which is why a parent купа́є the baby, but a grown swimmer купа́ється in the sea. English collapses two ideas into one word "swim"; Ukrainian splits them. купа́тися is "swim for fun / be in the water," while пла́вати is "swim as an activity or skill" (doing laps, knowing how to swim). Stress is marked on every form, and watch the perfective ви́купатися — its stress jumps onto the prefix ви́-, away from the root.
Present tense — first conjugation (imperfective купа́тися)
The imperfective купа́тися is first conjugation on the stem купа́-, with the -ю / -єш / -є / -ємо / -єте / -ють endings and the reflexive -ся. Stress is fixed on -а́- throughout — no swing.
| Person | купа́тися — PRESENT | English |
|---|---|---|
| я | купа́юся | I bathe / swim |
| ти | купа́єшся | you bathe / swim (sg.) |
| він / вона́ / воно́ | купа́ється | he / she / it bathes / swims |
| ми | купа́ємося | we bathe / swim |
| ви | купа́єтеся | you bathe / swim (pl./formal) |
| вони́ | купа́ються | they bathe / swim |
This is the form for habits and ongoing action — what you usually do at the lake, or the swimming happening right now. The shortened endings купа́юсь, купа́ємось, купа́єтесь are equally standard in speech; the full -ся / -ся forms are a touch more careful.
Улі́тку ми щодня́ купа́ємося в рі́чці за се́лом.
In summer we swim in the river behind the village every day. (1pl купа́ємося; habitual.)
Ти купа́єшся в холо́дній воді́? Я б не зміг.
You swim in cold water? I couldn't. (2sg купа́єшся; в + locative воді́.)
Ді́ти ці́лий день купа́ються в басе́йні.
The kids swim in the pool all day long. (3pl купа́ються; в + locative басе́йні.)
Perfective futures — present-form = future (ви́купатися / скупа́тися)
There are two everyday perfective partners, and they behave differently in the one thing learners notice most: stress. With ви́купатися the prefix ви́- is stressed and pulls the accent off the root in every single form. With скупа́тися the stress stays on the root -а́-. Both are perfective, so their present-form set is their simple future — "will (finish) bathing."
| Person | ви́купатися — FUTURE | скупа́тися — FUTURE |
|---|---|---|
| я | ви́купаюся | скупа́юся |
| ти | ви́купаєшся | скупа́єшся |
| він / вона́ / воно́ | ви́купається | скупа́ється |
| ми | ви́купаємося | скупа́ємося |
| ви | ви́купаєтеся | скупа́єтеся |
| вони́ | ви́купаються | скупа́ються |
There is no logical shortcut for the prefix stress — you simply memorize that ви́- is one of those Ukrainian perfectivizing prefixes that always grabs the accent (ви́пити, ви́йти, ви́купатися). The two perfectives differ slightly in feel: ви́купатися leans toward "have a proper, thorough bath / soak"; скупа́тися is more "take a (quick) dip, have a wash." This is the regular aspect contrast — perfective for the single, finished bathing event.
Я шви́дко ви́купаюся й ля́жу спа́ти.
I'll have a quick bath and go to bed. (Perfective future ви́купаюся — note the prefix stress ви́-.)
Дава́й скупа́ємося в о́зері, по́ки те́пло!
Let's have a dip in the lake while it's warm! (Perfective future / hortative скупа́ємося.)
Past tense — gendered (купа́вся / ви́купався)
All three verbs form a regular gendered past with the reflexive -ся after the gender marker. The imperfective and скупа́тися keep root stress on -а́-; ви́купатися keeps the prefix stress on ви́-.
| Gender / number | купа́тися (impf) | ви́купатися (pf) |
|---|---|---|
| masculine | купа́вся | ви́купався |
| feminine | купа́лася | ви́купалася |
| neuter | купа́лося | ви́купалося |
| plural | купа́лися | ви́купалися |
The imperfective купа́вся reads "used to swim / was swimming" (a habit or process); the perfective ви́купався / скупа́вся marks the finished result. Match the gender: a woman says я купа́лася, a man я купа́вся. The -ся sits after the gender marker (купа́-л-а-ся), so it never disturbs the agreement.
Уве́сь дитя́чий вік я купа́вся в цій рі́чці.
My whole childhood I swam in this river. (Imperfective past купа́вся — a lasting habit.)
Вона́ ви́купалася, переодягла́ся й поверну́лася на пляж.
She had a swim, changed, and went back to the beach. (Perfective past ви́купалася — the finished act, prefix-stressed.)
Imperative
The imperative comes mostly from the perfective for a one-off "have a swim now," and from the imperfective for the general invitation or habit.
| Addressee | купа́тися (impf) | ви́купатися (pf) |
|---|---|---|
| ти (informal) | купа́йся | ви́купайся |
| ви (formal / plural) | купа́йтеся | ви́купайтеся |
| 3rd person (let…) | хай / неха́й купа́ється | хай / неха́й ви́купається |
Купа́йся, але́ не заплива́й далеко́ — течія́ си́льна.
Swim, but don't go out too far — the current is strong. (Imperfective imperative купа́йся.)
Participles and verbal adverbs
| Form | купа́тися / ви́купатися |
|---|---|
| imperfective verbal adverb | купа́ючись "(while) swimming / bathing" |
| perfective verbal adverb | ви́купавшись "having bathed", скупа́вшись "having had a dip" |
| related (transitive) participle | ви́купаний "bathed, washed" (of the bathed person/thing) |
The verbal adverbs work in narrative: скупа́вшись "having had a swim" sets up a following action — Скупа́вшись, ми пішли́ обі́дати "Having had a swim, we went to lunch." The passive participle ви́купаний belongs to the transitive купа́ти ("a freshly-bathed baby"), not to the reflexive.
Купа́ючись у мо́рі, не забува́й про со́нце — згори́ш.
While swimming in the sea, don't forget about the sun — you'll get burned. (Verbal adverb купа́ючись.)
Key uses & case government
1. купа́тися в + locative — "swim / bathe in"
The body of water you swim in stands in в (у) + the locative: купа́тися в мо́рі, в рі́чці, в о́зері, у басе́йні, у ва́нні. This is the location of the action, so it is the locative, not the accusative of motion. See the wider case-government of verbs.
У таку́ спе́ку прия́тно купа́тися в холо́дному о́зері.
In heat like this it's pleasant to swim in a cold lake. (купа́тися + в + locative о́зері.)
2. купа́тися vs пла́вати — swim for fun vs swim as a skill
This is the distinction English speakers most often blur. купа́тися = be in the water, splash, cool off, enjoy yourself. пла́вати = swim as an activity or ability — do laps, swim across, know how to swim. So Я не вмі́ю пла́вати, тому́ купа́юся бі́ля бе́рега "I can't swim, so I bathe near the shore" is perfectly coherent: you can купа́тися without being able to пла́вати.
Ді́ти ще не вмі́ють пла́вати, але́ ра́до купа́ються на мілко́му.
The children can't swim yet, but they happily splash about in the shallows. (Contrast: пла́вати 'swim as a skill' vs купа́тися 'be in the water for fun'.)
3. купа́ти (transitive) vs купа́тися (reflexive) — bathe someone vs bathe oneself
The pair to keep straight. купа́ти is transitive, "to bathe someone," taking the accusative of the person bathed: купа́ти дити́ну, купа́ти соба́ку. Add -ся and the action turns back on the subject. So Я купа́ю си́на = "I'm bathing my son," while Я купа́юся = "I'm bathing / swimming myself." The perfectives line up too: transitive ви́купати/скупа́ти "bathe someone" vs reflexive ви́купатися/скупа́тися. See the meanings of -ся.
Споча́тку я ви́купаю дити́ну, а по́тім ви́купаюся сама́.
First I'll bathe the baby, then I'll have a bath myself. (Transitive ви́купаю + accusative дити́ну vs reflexive ви́купаюся.)
Common Mistakes
❌ Я люблю́ купа́ти в мо́рі.
Missing -ся — without it, купа́ти means 'bathe someone'. To say 'I love swimming in the sea', keep the reflexive: купа́тися.
✅ Я люблю́ купа́тися в мо́рі.
I love swimming in the sea.
❌ Ми купа́лися в о́зеро ці́лий день.
Case error — the place you swim IN takes в + the LOCATIVE (в о́зері), not the accusative of motion (в о́зеро).
✅ Ми купа́лися в о́зері ці́лий день.
We swam in the lake all day.
❌ Я не вмі́ю купа́тися.
Wrong verb — for the skill 'know how to swim' use пла́вати, not купа́тися. купа́тися is 'be in the water for fun', not the ability.
✅ Я не вмі́ю пла́вати.
I can't swim.
❌ Зачека́й, я скупа́юся і вику́паюся за п’ять хвили́н.
Stress error — the prefix ви- is stressed: ви́купаюся, not вику́паюся. (And you wouldn't normally stack both perfectives.)
✅ Зачека́й, я ви́купаюся за п’ять хвили́н.
Wait, I'll have a bath in five minutes.
❌ Вона́ купа́вся в рі́чці.
Agreement error — the past agrees with gender; a female subject takes купа́лася: Вона́ купа́лася в рі́чці.
✅ Вона́ купа́лася в рі́чці.
She was swimming in the river.
Key Takeaways
- True reflexive: купа́тися = купа́ти "bathe (someone)" + -ся "oneself"; keep -ся to bathe/swim yourself, drop it to bathe someone else (+ accusative).
- Two perfectives: ви́купатися (prefix-stressed ви́-, "have a proper bath") and скупа́тися (root-stressed, "take a dip") — both perfective, present-form = future.
- Present (impf): купа́юся / купа́єшся / купа́ється / купа́ємося / купа́єтеся / купа́ються — fixed -а́- stress.
- Past: купа́вся / купа́лася… (impf), ви́купався / ви́купалася… (pf, prefix-stressed) — agrees with gender.
- Government: в (у) + locative for the water you swim in — купа́тися в мо́рі, в рі́чці.
- купа́тися ≠ пла́вати: купа́тися is "swim for fun / be in the water"; пла́вати is "swim as an activity or skill."
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