Infinitive (imperfective): ляга́ти — "to lie down, to go to bed" Perfective partner: лягти́ — "to lie down (once, completely)" Type: an aspect pair with an irregular perfective (velar mutation г→ж; consonant-stem past ліг)
ляга́ти / лягти́ is the verb for the act of lying down — the movement from upright to horizontal, and by extension "to go to bed." It is the change-of-state partner of лежа́ти, which is the state of lying there, exactly as сіда́ти / сі́сти "sit down" is the action behind the state сиді́ти. The perfective лягти́ is one of the trickiest common verbs in the language: its future shows the velar mutation г → ж (ля́жу, not лягу), and its masculine past collapses to the bare consonant stem ліг — no -в, no vowel you would expect. These two irregularities catch out every learner, so they are flagged at every step below. Stress is marked on every form.
Present tense — ляга́ю / ляга́єш…
The imperfective present is fully regular first-conjugation off the ляга- stem with j-glide endings (ляга́ю, ляга́єш…), stem-stressed on -га́- throughout. There is nothing irregular here — all the trouble is in the perfective.
| Person | ляга́ти — PRESENT | English |
|---|---|---|
| я | ляга́ю | I lie down / am lying down |
| ти | ляга́єш | you lie down (sg.) |
| він / вона́ / воно́ | ляга́є | he / she / it lies down |
| ми | ляга́ємо | we lie down |
| ви | ляга́єте | you lie down (pl./formal) |
| вони́ | ляга́ють | they lie down |
Imperfective ляга́ти describes a habit or a repeated action — what time you go to bed, lying down to rest in the afternoon.
Я зазвича́й ляга́ю спа́ти бли́зько одина́дцятої.
I usually go to bed around eleven. (Habitual present ляга́ю + спа́ти.)
Що́дня по обі́ді ба́буся ляга́є відпочи́ти на годи́ну.
Every day after lunch grandma lies down to rest for an hour. (Repeated action — imperfective ляга́є.)
Past tense — ляга́в (impf) vs ліг / лягла́ (pf)
The imperfective past is regular: ляга́в / ляга́ла. The perfective past is where the verb bites: the masculine is the bare consonant ліг (the historical лягл lost its -л and the vowel changed to і), while the feminine, neuter and plural keep the -л- and are end-stressed: лягла́, лягло́, лягли́. See l-to-v and consonant-stem pasts.
| Gender / number | ляга́ти (impf) | лягти́ (pf) |
|---|---|---|
| masculine | ляга́в | ліг |
| feminine | ляга́ла | лягла́ |
| neuter | ляга́ло | лягло́ |
| plural | ляга́ли | лягли́ |
Imperfective ляга́в = "used to lie down / was lying down"; perfective ліг = "lay down" — the single completed act. "I went to bed late last night" is the one-off perfective: Учо́ра я пі́зно ліг.
Учо́ра я ліг аж за пі́вніч, бо догото́влював зві́т.
Yesterday I went to bed after midnight because I was finishing a report. (Perfective ліг — the bare-consonant masculine form, monosyllabic so it takes no stress mark.)
Вона́ лягла́ на дива́н і вмить засну́ла.
She lay down on the sofa and instantly fell asleep. (Perfective feminine лягла́ — end-stressed, keeps the -л-.)
Future tense
Perfective лягти́ — the simple future (the г→ж mutation)
The perfective's present-form is its future, and here is the second irregularity: the velar г of the stem mutates to ж before the endings, giving ля́жу, ля́жеш, ля́же… — stem-stressed throughout. There is no лягу́, лягеш; the ж is obligatory in every person. This is the same velar→hushing shift you see in бі́гти → біжу́ and могти́ → можу́.
| Person | лягти́ — FUTURE | English |
|---|---|---|
| я | ля́жу | I'll lie down |
| ти | ля́жеш | you'll lie down |
| він / вона́ / воно́ | ля́же | he / she / it will lie down |
| ми | ля́жемо | we'll lie down |
| ви | ля́жете | you'll lie down |
| вони́ | ля́жуть | they'll lie down |
Сього́дні я ля́жу ра́ніше, бо вранці́ ра́но встава́ти.
Today I'll go to bed earlier because I have to get up early in the morning. (Perfective future ля́жу — г→ж.)
Imperfective ляга́ти — both compound futures
The imperfective forms its future analytically (бу́ду + infinitive) or synthetically (the -му form), framing a repeated future lying-down.
| Person | Analytic (бу́ду + inf.) | Synthetic (-му) |
|---|---|---|
| я | бу́ду ляга́ти | ляга́тиму |
| ти | бу́деш ляга́ти | ляга́тимеш |
| він / вона́ / воно́ | бу́де ляга́ти | ляга́тиме |
| ми | бу́демо ляга́ти | ляга́тимемо |
| ви | бу́дете ляга́ти | ляга́тимете |
| вони́ | бу́дуть ляга́ти | ляга́тимуть |
Із Но́вого ро́ку я бу́ду ляга́ти до десятої, щоб ви́спатися.
From the New Year I'll start going to bed by ten so I get enough sleep. (Imperfective future — a future habit.)
Imperative
The imperfective ляга́й / ляга́йте is the everyday "lie down, go to bed" you say to a child or a patient; the perfective ляж / ля́жте is sharper and one-off ("lie down — now"). Note that the imperative carries the same г → ж mutation as the future: it is ляж, not ляг — the ж runs right through the perfective's non-past and imperative.
| Addressee | ляга́ти (impf) | лягти́ (pf) |
|---|---|---|
| ти (informal) | ляга́й | ляж |
| ви (formal / plural) | ляга́йте | ля́жте |
| 3rd person (let…) | хай / неха́й ляга́є | хай / неха́й ля́же |
Ляга́й уже́, ді́тонько, пі́зно — за́втра до шко́ли.
Go to bed now, little one, it's late — school tomorrow. (Imperfective ляга́й — gentle, everyday.)
Ляж і не ворушись, я зніму́ скабку́.
Lie down and don't move, I'll get the splinter out. (Perfective ляж — single, immediate.)
Participles and verbal adverbs
| Form | ляга́ти / лягти́ |
|---|---|
| imperfective verbal adverb | ляга́ючи "(while) lying down" |
| perfective verbal adverb | лі́гши "having lain down" |
The perfective лі́гши keeps the consonant stem of ліг — Лі́гши, він ще до́вго диви́вся в сте́лю "Having lain down, he stared at the ceiling for a long time." Both are (literary / written).
Key uses & case government
1. ляга́ти / лягти́ vs лежа́ти — action vs state
The contrast to master. лягти́ is the movement into a horizontal position; лежа́ти is the resulting state of lying there. A duration phrase signals which: Він ліг "He lay down (one moment)" vs Він лежа́в годи́ну "He lay there for an hour." Using лягти́ for a static "is lying" is a classic transfer error from English "is lying down." The same action-vs-state split governs сиді́ти "be sitting" and стоя́ти "be standing."
Хво́рий ліг і пролежа́в без ру́ху до ра́нку.
The patient lay down and lay motionless until morning. (ліг = the action; пролежа́в = the lasting state.)
2. Directional на / в + accusative — where you lie down
Because lying down is a movement to a place, the destination takes на / в + accusative (the accusative of direction), never the locative: лягти́ на дива́н "lie down on the sofa," лягти́ в лі́жко "get into bed," лягти́ на спи́ну "lie on your back." See motion vs location.
Ляж на спи́ну й глибо́ко диха́й — так бі́ль ущу́хне.
Lie on your back and breathe deeply — the pain will ease that way. (Directional на + accusative спи́ну.)
3. The idiom лягти́ спа́ти — to go to bed
The fixed phrase for "go to bed" is ляга́ти / лягти́ спа́ти (literally "lie down to sleep") — спа́ти is the imperfective infinitive of purpose, and it does not change. Do not say лягти́ до лі́жка for "go to bed"; that means physically up to the bed, not the daily ritual.
Ді́ти, ми́йте зу́би і ляга́йте спа́ти — уже́ деся́та.
Kids, brush your teeth and go to bed — it's already ten. (The idiom ляга́йте спа́ти.)
Common Mistakes
❌ За́втра я лягу́ ра́но.
The perfective future mutates г→ж and is stem-stressed — there is no *лягу́*: За́втра я ля́жу ра́но.
✅ За́втра я ля́жу ра́но.
Tomorrow I'll go to bed early.
❌ Він лягв на дива́н.
The masculine past is the bare consonant ліг, not *лягв* or *лягнув*: Він ліг на дива́н.
✅ Він ліг на дива́н.
He lay down on the sofa.
❌ Я лягти́ на ліжку́ і чита́ю кни́жку.
State/action mix-up + case — for 'I'm lying in bed reading' you want the state verb лежа́ти with the locative: Я лежу́ в лі́жку й чита́ю кни́жку.
✅ Я лежу́ в лі́жку й чита́ю кни́жку.
I'm lying in bed reading a book.
❌ Вона́ ліг ра́но.
Agreement error — a female subject takes лягла́: Вона́ лягла́ ра́но.
✅ Вона́ лягла́ ра́но.
She went to bed early.
❌ Лягся, будь ла́ска.
ляга́ти / лягти́ is not reflexive — no -ся: Ляга́й / Ляж, будь ла́ска.
✅ Ляга́й, будь ла́ска.
Lie down, please.
Key Takeaways
- ляга́ти / лягти́ = the ACTION of lying down; лежа́ти is the STATE of lying there. Keep them apart.
- Present (impf): ляга́ю / ляга́єш / ляга́є / ляга́ємо / ляга́єте / ляга́ють — regular, stem-stressed.
- Future (pf), IRREGULAR: ля́жу / ля́жеш / ля́же / ля́жемо / ля́жете / ля́жуть — velar mutation г → ж, never лягу́.
- Past (pf), IRREGULAR: masculine ліг (bare consonant), then лягла́ / лягло́ / лягли́ (end-stressed, with -л-).
- Government: directional на / в + accusative (motion to a place); the idiom лягти́ спа́ти "go to bed."
- Imperative: everyday Ляга́й! / Ляга́йте! vs single Ляж! / Ля́жте!
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