High-Frequency Aspect Pairs to Memorize

Every Ukrainian verb comes as a two-verb set: an imperfective (the ongoing process, the habit, the bare fact of the action) and a perfective (the single completed event, the result). You can't get far without knowing the pairs, and the good news is that they are not random — they cluster by how the two members relate to each other. Learn them grouped by formation type and a few dozen pairs fall into place at once. This page is the memorization hub: the four formation patterns and the ~40 highest-frequency pairs in each. The mechanics behind each pattern are explained on the prefix and suffix pages; here you just bank the words.

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Always learn a verb as a pair, in the order imperfective–perfective: not "чита́ти = to read" but "чита́ти / прочита́ти = to read." The pair is the unit of vocabulary. Half a verb is half-learned.

Group 1: Prefix pairs (a prefix builds the perfective)

The most common pattern by far. The imperfective is the bare verb, and a prefix (про-, на-, з-/с-, по-, ви-, при-) turns it into the perfective. The prefix here adds completion, not new meaning — прочита́ти is still just "read," only finished.

ImperfectivePerfectiveMeaning
чита́типрочита́тиto read
писа́тинаписа́тиto write
роби́тизроби́тиto do, make
їстиз’їстиto eat
пи́тиви́питиto drink
ба́читипоба́читиto see
чу́типочу́тиto hear
вчи́тиви́вчитиto learn, memorise
диви́тисяподиви́тисяto look, watch
готува́типриготува́тиto cook, prepare
малюва́тинамалюва́тиto draw, paint
будува́тизбудува́тиto build

Я щовечора чита́ю до́ньці ка́зку, а вчо́ра нарешті прочита́ли всю кни́жку.

Every evening I read my daughter a fairy tale, and yesterday we finally read the whole book. (чита́ю imperfective habit; прочита́ли perfective, the book finished.)

Не заважа́й, я готу́ю вече́рю — приготу́ю за пів годи́ни.

Don't get in the way, I'm cooking dinner — I'll have it ready in half an hour. (готу́ю imperfective, in progress; приготу́ю perfective future, the result.)

Ти вже подиви́вся той фільм? — Ні, дивлю́ся про́сто за́раз.

Have you watched that film yet? — No, I'm watching it right now. (подиви́вся perfective, done; дивлю́ся imperfective, ongoing.)

Group 2: Suffix pairs (a suffix builds the imperfective)

Here the relationship runs the other way: the perfective is the short, tight verb, and the imperfective is the longer one, padded out with -ува-/-юва- or -а-/-ва-. These are "secondary imperfectives" — imperfectives derived back from a perfective (see secondary imperfectives). A reliable visual cue: in a suffix pair, the longer word is the imperfective.

Imperfective (longer)Perfective (shorter)Meaning
купува́тикупи́тиto buy
дава́тида́тиto give
пока́зуватипоказа́тиto show
забува́тизабу́тиto forget
відкрива́тивідкри́тиto open
зачиня́тизачини́тиto close (a door)
вирі́шувативи́рішитиto decide, solve
зустріча́тизустрі́тиto meet
повертатисяповерну́тисяto return, come back
зака́нчуватизакі́нчитиto finish

Я зазвича́й купу́ю хліб у тій пека́рні, а сього́дні купи́в у суперма́ркеті.

I usually buy bread at that bakery, but today I bought it at the supermarket. (купу́ю imperfective habit; купи́в perfective, one purchase.)

Вони́ щодня́ відкрива́ють кав’я́рню о во́сьмій, а сього́дні відкри́ли о деся́тій.

They open the café at eight every day, but today they opened at ten. (відкрива́ють imperfective habit; відкри́ли perfective, one event.)

Не вмика́й телеві́зор — я ще не ви́рішила, що ми диви́тимемося.

Don't switch on the TV — I haven't decided yet what we'll watch. (ви́рішила perfective, the decision as a finished point.)

Group 3: Suppletive pairs (two different roots — pure memory)

A small but extremely high-frequency group forms its pair from two unrelated roots, like English go / went or good / better. No prefix, no suffix connects them — you simply memorise the pair as a fixed couple. These are worth drilling first precisely because no rule will rescue you.

ImperfectivePerfectiveMeaning
бра́тивзя́тиto take
говори́ти / каза́тисказа́тиto say, tell
лови́тиспійма́ти / злови́тиto catch
кла́стипокла́стиto put, lay
шука́тизнайти́to look for / find

These are only loosely "suppletive" in places — лови́ти / злови́ти share a root and differ only by a prefix, while лови́ти / спійма́ти are genuinely from two roots; both perfectives are standard, спійма́ти being especially common for "catch and succeed." And говори́ти / каза́ти / сказа́ти is a three-way knot: говори́ти and каза́ти are both imperfective, and сказа́ти is the perfective of каза́ти. See бра́ти / взя́ти and говори́ти for full paradigms.

Я за́вжди беру́ парасо́льку, а сього́дні взяв і — звича́йно — не знадоби́лася.

I always take an umbrella, and today I took one and — of course — didn't need it. (беру́ from бра́ти; взяв from взя́ти — a completely different root.)

Скі́льки разі́в я тобі́ каза́ла? Я сказа́ла оди́н раз — а ти забу́в.

How many times have I told you? I said it once — and you forgot. (каза́ла imperfective, repeated; сказа́ла perfective, one act — suppletive.)

Group 4: Root-vowel pairs (the vowel changes, о/е → и)

A neat, systematic cluster: the two members share a root, but forming the imperfective lengthens the verb and alternates the root vowel — a tight о or е in the perfective opens up to и in the imperfective. Once you spot the alternation, you can predict whole sets of these.

Imperfective (и)Perfective (о/е)Meaning
збира́тизібра́тиto gather, collect
помира́типоме́ртиto die
почина́типоча́тиto begin
назива́тиназва́тиto name, call
посила́типосла́тиto send

Щовесни́ ми всі́єю роди́ною збира́ємо чере́шні, а цьогорі́ч зібра́ли два відра́ за годи́ну.

Every spring our whole family picks cherries, and this year we gathered two buckets in an hour. (збира́ємо imperfective habit, root и; зібра́ли perfective result, root о.)

Фільм щойно почина́ється — ти встиг? — Так, я поча́в дивитися з са́мого поча́тку.

The film is just starting — did you make it? — Yes, I started watching from the very beginning. (почина́ється imperfective, root и; поча́в perfective, root о.)

Common Mistakes

❌ Учо́ра я чита́в усю́ кни́жку до кінця́.

Wrong for 'I read the whole book to the end (and finished)' — a completed result needs the perfective: Учо́ра я прочита́в усю́ кни́жку. (чита́в is fine for 'was reading', but not for the finished whole.)

✅ Учо́ра я прочита́в усю́ кни́жку.

Yesterday I read the whole book (and finished it). (прочита́в perfective, the result.)

❌ Я щодня́ купи́ти молоко́.

Wrong on two counts — a habit needs the imperfective, and you need a finite verb, not an infinitive: Я щодня́ купу́ю молоко́.

✅ Я щодня́ купу́ю молоко́.

I buy milk every day. (купу́ю, from imperfective купува́ти — the habit.)

❌ Я ча́сто взяв таксі́ додо́му.

Mismatched — 'often' is a habit, which needs the imperfective бра́ти: Я ча́сто беру́ таксі́ додо́му.

✅ Я ча́сто беру́ таксі́ додо́му.

I often take a taxi home. (беру́, from imperfective бра́ти.)

❌ Я хо́чу сказа́ти украї́нською щодня́.

For an ongoing skill / habit ('I want to speak Ukrainian'), use the imperfective говори́ти, not the perfective сказа́ти: Я хо́чу говори́ти украї́нською щодня́.

✅ Я хо́чу говори́ти украї́нською щодня́.

I want to speak Ukrainian every day. (говори́ти imperfective, the activity.)

Key Takeaways

  • A verb is a pair; learn it as one, imperfective–perfective: чита́ти / прочита́ти.
  • Prefix pairs (the biggest group): bare imperfective + a perfectivising prefix — чита́ти/прочита́ти, писа́ти/написа́ти, роби́ти/зроби́ти, пи́ти/ви́пити, ба́чити/поба́чити.
  • Suffix pairs: short perfective + a longer imperfective in -ува-/-а- — купи́ти/купува́ти, да́ти/дава́ти, показа́ти/пока́зувати; the longer word is the imperfective.
  • Suppletive pairs (pure memory, two roots): бра́ти/взя́ти, каза́ти/сказа́ти, лови́ти/спійма́ти, кла́сти/покла́сти, шука́ти/знайти́.
  • Root-vowel pairs: the vowel alternates о/е → и — збира́ти/зібра́ти, помира́ти/поме́рти, почина́ти/поча́ти.

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Related Topics

  • Verbal Aspect: The Big PictureA2Aspect is the central, pervasive feature of the Ukrainian verb: nearly every verb belongs to an aspect PAIR — imperfective (недоко́наний вид), which views an action as a process, ongoing, repeated, or general (чита́ти), and perfective (доко́наний вид), which views it as a single completed whole with a result or boundary (прочита́ти). The consequences are sharp: imperfectives have a present, a past, and BOTH futures (бу́ду чита́ти / чита́тиму); perfectives have NO present — their present-shaped form is future (прочита́ю = 'I will read it through') — only a past (прочита́в) and a simple future (прочита́ю). Aspect is chosen for EVERY verb in EVERY clause; it is not optional, and it has no English equivalent.
  • Forming Aspect Pairs: PrefixesB1The most common way to build a perfective is to add a 'pure' perfectivizing prefix to the imperfective: чита́ти→прочита́ти, писа́ти→написа́ти, роби́ти→зроби́ти, ї́сти→з’ї́сти, пи́ти→ви́пити. The frequent perfectivizing prefixes are про-, на-, з-/с-/зі-, по-, ви-, при-. The catch: the SAME prefixes can instead add lexical meaning and make a NEW verb (писа́ти→переписа́ти 'rewrite'), so you must learn to tell aspect-only prefixation from meaning-changing prefixation.
  • Forming Aspect Pairs: Suffixes and StemsB1The other half of the pairing system: deriving an IMPERFECTIVE from a perfective by suffix, above all the -а-/-ува-/-ову- imperfectivizing suffixes — да́ти→дава́ти, купи́ти→купува́ти, показа́ти→пока́зувати, забу́ти→забува́ти, відкри́ти→відкрива́ти. Plus consonant mutations (зустрі́ти→зустріча́ти), root-vowel alternations (зібра́ти→збира́ти, поме́рти→помира́ти), and the handful of suppletive pairs that must simply be memorised (бра́ти/взя́ти, говори́ти/сказа́ти).
  • Secondary Imperfectives and Aspect TripletsB2How a prefixed perfective spawns its own imperfective via -ува-/-юва-/-а- (переписа́ти → перепи́сувати), producing aspect 'triplets' (писа́ти → переписа́ти → перепи́сувати) — the engine that keeps every prefixed verb aspectually paired, plus the о/и and е/и root alternations (зібра́ти → збира́ти) that ride along with it.
  • Брати / Взяти (to take)A2Complete conjugation-and-usage reference for the suppletive aspect pair бра́ти / взя́ти 'to take'. The imperfective бра́ти builds its present on a hidden бер- stem (беру́, бере́ш, бере́…), while the perfective взя́ти supplies a completely different future (візьму́, ві́зьмеш…). Covers the gendered past (брав / брала́ … узя́в / взяла́), both imperfective futures, the imperative (бери́ / візьми́), case government (accusative object), and the high-frequency idioms бра́ти у́часть 'take part' and взя́ти себе́ в ру́ки 'pull oneself together'.
  • Говорити (to speak)A1Complete conjugation-and-usage reference for говори́ти 'to speak / talk / say' — a second-conjugation verb with the codified MOBILE STRESS that trips up everyone: end-stressed only in the 1sg говорю́, then stem-stressed гово́риш, гово́рить, гово́римо, гово́рите, гово́рять. Covers the gendered past, both imperfective futures, the imperative, the bare-INSTRUMENTAL pattern for 'speak a language' (говори́ти украї́нською), and the three-way split with розмовля́ти 'converse' and каза́ти / сказа́ти 'say'.