The Prepositional: Functions Summary
The prepositional case (предло́жный паде́ж, predlózhny padézh — "the prepositional case," from предло́г "preposition") is the one case you can describe in a single rule: it never appears without a preposition. That is literally where its name comes from. And it does essentially two jobs: it marks static LOCATION (where something is, with в/на) and TOPIC (what something is about, with о/об) — plus the smaller jobs of при ("while/upon") and a special second locative ending in -у́. This page consolidates all of it onto one screen and links each function to a fuller lesson. The contrast worth carrying away: в/на + prepositional = being at; в/на + accusative = going to.
The forms at a glance
The prepositional singular is mostly -е, with one big exception (-ии) and one soft-feminine quirk (-и). Full paradigm on prepositional forms.
| Gender / type | Nom. sg. | Prep. sg. | Prep. pl. |
|---|---|---|---|
| Masc. / neut. (most) | стол (table), окно́ (window) | о столе́, в окне́ (-е) | о стола́х, о о́кнах |
| Feminine -а | Москва́ (Moscow) | в Москве́ (-е) | в города́х |
| Nouns in -ий / -ие / -ия | зда́ние (building), Росси́я, ле́кция | в зда́нии, в Росси́и, на ле́кции (-ии) | в зда́ниях |
| Feminine -ь | ночь (night) | о но́чи (-и) | о ноча́х |
The pronoun forms always carry their preposition, so learn them with о attached:
| Nominative | я | ты | он | она́ | мы | вы | они́ |
|---|---|---|---|---|---|---|---|
| о + prepositional | обо мне́ | о тебе́ | о нём | о ней | о нас | о вас | о них |
Note обо мне́ (with an extra -о on the preposition before the consonant cluster мн-) — it is the one slightly irregular pairing.
The uses, one example each
1. Location — в / на + prepositional ("where")
The headline use: where something is, after в ("in/at") or на ("on/at"). This answers где? ("where?"). Crucially, the same в/на take the accusative for motion (куда́, "to where") — so the case, not the preposition, tells you whether you are at a place or heading to it. See location with в and на.
Я сейча́с в Москве́, на конфере́нции, верну́сь в пя́тницу.
I'm in Moscow right now, at a conference, back on Friday. — в Москве́, location → prepositional (-е).
Твой телефо́н на столе́, я его́ ви́дел там у́тром.
Your phone is on the table, I saw it there this morning. — на столе́, location → prepositional.
2. Topic — о / об + prepositional ("about")
The second great use: what something is about — after о (before a consonant) or об (before a vowel). This is the neutral-to-formal "about"; its informal cousin про takes the accusative. See topic with о/об.
Дава́й не бу́дем говори́ть о пого́де, расскажи́ что́-нибудь интере́сное.
Let's not talk about the weather, tell me something interesting. — о пого́де, topic → prepositional.
Я ду́маю об э́той пробле́ме уже́ неде́лю.
I've been thinking about this problem for a week. — об э́той пробле́ме, 'об' before a vowel sound → prepositional.
3. Events and activities — на + prepositional
For being at an event or activity — a lesson, a concert, work, a meeting — Russian overwhelmingly uses на (not в) + prepositional: на уро́ке, на конце́рте, на рабо́те, на встре́че. See events and activities.
Я сейча́с на ле́кции, не могу́ говори́ть, напишу́ по́зже.
I'm in a lecture right now, can't talk, I'll text later. — на ле́кции (-ии), event → на + prepositional.
4. При — "while / during / in the presence of / upon"
The preposition при (+ prepositional) is harder to translate: it marks an attendant circumstance — "in the presence of," "during the reign/time of," "upon (doing)," "given (a condition)." See the preposition при.
Не говори́ об э́том при де́тях, они́ всё понима́ют.
Don't talk about this in front of the children, they understand everything. — при де́тях, 'in the presence of' → prepositional.
5. The second locative — в/на + -у́ (в лесу́)
A handful of masculine nouns have a special locative ending -у́ (always stressed) used only after в/на for location — distinct from their regular -е prepositional (which survives for the о-"about" meaning). So: в лесу́ (in the forest), на берегу́ (on the shore), в аэропорту́, в саду́, на полу́ — but о ле́се ("about the forest"). See the second locative.
Мы гуля́ли в лесу́ и собира́ли грибы́ це́лый день.
We walked in the forest and gathered mushrooms all day. — в лесу́, second locative (-у́).
The unifying insight
The prepositional is the cleanest case in Russian to wrap your head around, for two reasons. First, its name is its rule: предло́жный — it cannot exist without a предло́г (preposition), so you never have to wonder "is this a prepositional?" If there is no preposition, it is not. Second, it does only two main things, and they sit on opposite sides of a clean question. Where is it? → location, в/на + prepositional. What is it about? → topic, о/об + prepositional. Everything else (при, the second locative) is a refinement of "location/circumstance." That is why the case anchors the most important spatial contrast a beginner learns: в шко́ле / в шко́лу — "at school" (prepositional, being there) versus "to school" (accusative, going there). Same preposition, different case, opposite meaning.
Common Mistakes
❌ Я в Москва́.
Incorrect — location after в needs the prepositional ending: в Москве́.
✅ Я в Москве́.
I'm in Moscow. — location → prepositional (-е).
❌ Я живу́ в шко́лу.
Incorrect — 'live/be at' is location, so в takes the prepositional (в шко́ле); the accusative шко́лу is only for motion toward.
✅ Я в шко́ле.
I'm at school. — location → prepositional, not accusative.
❌ Мы говори́м о Росси́е.
Incorrect — nouns in -ия take -ии in the prepositional: о Росси́и.
✅ Мы говори́м о Росси́и.
We're talking about Russia. — -ия → -ии in the prepositional.
❌ Я ду́маю о тебя́.
Incorrect — о governs the prepositional, not the genitive: о тебе́.
✅ Я ду́маю о тебе́.
I'm thinking about you. — о + prepositional тебе́.
❌ Мы гуля́ли в ле́се (intending the everyday 'in the forest').
Understandable but non-idiomatic for physical location — forest takes the second locative в лесу́; в ле́се survives mainly in fixed/figurative use.
✅ Мы гуля́ли в лесу́.
We walked in the forest. — second locative (-у́) for physical location.
Key Takeaways
- The prepositional is the only case that never appears without a preposition — its name is its rule.
- It does two main jobs: LOCATION (where something is, в/на + prep) and TOPIC (what it's about, о/об + prep).
- Forms: mostly -е (в Москве́, на столе́), but -ии for nouns in -ий/-ие/-ия (в Росси́и, в зда́нии, на ле́кции), and -и for feminine -ь (о но́чи).
- Pronouns carry their preposition: обо мне́, о тебе́, о нём, о ней, о нас, о вас, о них.
- The core contrast: в/на + prepositional = being at (в шко́ле) vs в/на + accusative = going to (в шко́лу); plus при ("in the presence of / upon") and the second locative -у́ (в лесу́, на берегу́).
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- Prepositional: FormsA1 — The prepositional (предло́жный паде́ж) endings — the one case that NEVER appears without a preposition. Singular: mostly -е (в столе́, в кни́ге, в окне́), but -ия/-ие/-ий and feminine -ь nouns take -и (в Росси́и, в зда́нии, о ле́кции, о но́чи). Plural: -ах/-ях for everyone (на стола́х, в кни́гах). Pronouns add н- after a preposition: о нём, о ней, о них.
- Prepositional for Location (в and на)A1 — The prepositional's main job: saying WHERE something is, after в (in/at, enclosed) and на (on/at a surface or event). В Москве́, в шко́ле, на столе́, на рабо́те. The big contrast: location takes the prepositional (Я в шко́ле) but motion-to takes the accusative (Я иду́ в шко́лу) — same prepositions, different case. Plus the lexical на-list you must memorize.
- Prepositional for Topic (о/об 'about')A1 — о/об/обо + prepositional means 'about, concerning' — ду́мать о бу́дущем, кни́га о войне́, мечта́ть о ле́те. The preposition changes shape: о before consonants (о ма́ме), об before vowels (об Анне, об э́том), обо in fixed phrases (обо мне, обо всём). Several verbs that are transitive in English need о + prepositional in Russian.
- The Second Locative (в лесу, на берегу)B1 — A closed set of roughly a hundred masculine nouns hides a special STRESSED ending -у́/-ю́ that surfaces only after в/на meaning 'in/on' a place: в лесу́ (in the forest), на берегу́ (on the bank), в саду́ (in the garden), на полу́ (on the floor), and the everyday в э́том году́ (this year). The same noun reverts to the regular -е everywhere else — о ле́се ('about the forest'), о го́де — so the locative-2 is a tiny but high-frequency subset of the prepositional, not a new case. This is the rule most courses skip, which is exactly why learners keep saying *в лесе, *на бе́реге.
- The Preposition При + PrepositionalB2 — При is a compact, slightly formal preposition that always takes the prepositional and folds five meanings English needs different phrasing for into one word: (1) in the presence of (при мне, при де́тях); (2) attached to / affiliated with (кафе́ при гости́нице); (3) during the era or reign of (при Петре́ Пе́рвом, при СССР); (4) under the condition of (при усло́вии, при необходи́мости); (5) having on one's person (при де́ньгах, докуме́нты при себе́). Plus the fixed phrases при э́том and ни при чём.
- The Russian Case System: OverviewA1 — Russian has six cases — имени́тельный (nominative), роди́тельный (genitive), да́тельный (dative), вини́тельный (accusative), твори́тельный (instrumental), and предло́жный (prepositional) — and each one is signalled by a change to the noun's ending. This page is your bird's-eye view: the name of each case, the question it answers, the one-line job it does, and one noun (журна́л, magazine) shown running through all six so you can see the whole system at once.