One broad plural ending family
Prepositional plural is much more regular than genitive plural: use -ах after hard stems and -ях after soft or /j/-related stems.
- The form is always prepositional only when a preposition supplies the relation: в города́х, на острова́х, о друзья́х, при де́тях.
- No plural -у locative: Singular в лесу́ has ordinary plural в леса́х. Restricted second locatives do not form a parallel productive plural case.
08.01 One broad plural ending family
| Stem | Ending | Examples |
|---|
| hard | -ах | в города́х, кни́гах, о́кнах |
|---|
| soft / -й / -ь / /j/ | -ях | в музе́ях, словаря́х, неде́лях |
|---|
| irregular plural stem | -ах / -ях chosen by stem | о людя́х, детя́х, друзья́х |
|---|
Hard stems in -ах
Gender does not matter; the final quality of the plural stem guides -ах.
- After г, к, х, ж, ч, ш, щ, and ц, the plural prepositional ending remains -ах when the stem is hard for this pattern: в кни́гах, о зада́чах, на у́лицах.
- Do not recycle the -ы/-и rule: The nominative plural spelling rule does not turn every later -ах into -ях.
08.02 Hard stems in -ах
| Noun | Plural stem | Prepositional plural |
|---|
| стол | стол- | на стола́х |
|---|
| го́род | город- | в города́х |
|---|
| кни́га | книг- | в кни́гах |
|---|
| зада́ча | задач- | о зада́чах |
|---|
| окно́ | окн- | в о́кнах |
|---|
| у́лица | улиц- | на у́лицах |
|---|
Soft and /j/-related stems in -ях
Nouns in -й, soft -ь, ordinary -я, and -ие typically form -ях on the plural stem.
- Written музе́ях and зда́ниях reflect /j/-related stems plus -ах/-ях morphology. Learn the complete surface form rather than counting vowels.
- Stress: Soft-stem plurals often carry ending or late stem stress: словаря́х, учителя́х, моря́х; but музе́ях and зда́ниях keep earlier stress.
08.03 Soft and /j/-related stems in -ях
| Noun | Plural | Prepositional plural |
|---|
| музе́й | музе́и | в музе́ях |
|---|
| слова́рь | словари́ | в словаря́х |
|---|
| учи́тель | учителя́ | об учителя́х |
|---|
| неде́ля | неде́ли | на неде́лях |
|---|
| мо́ре | моря́ | на моря́х |
|---|
| зда́ние | зда́ния | в зда́ниях |
|---|
Irregular plural stems and plural-only nouns
Once the plural stem is known, the ending is usually regular.
- Pattern insight: Irregularity is concentrated in the stem; dative -ам/-ям, instrumental -ами/-ями, and prepositional -ах/-ях are largely regular once that stem is available.
08.04 Irregular plural stems and plural-only nouns
| Nominative plural | Prepositional plural | Stem carried forward |
|---|
| лю́ди | о людя́х | люд-/люд' alternation |
|---|
| де́ти | о де́тях | дет- |
|---|
| друзья́ | о друзья́х | друзьj- |
|---|
| бра́тья | о бра́тьях | братьj- |
|---|
| дере́вья | на дере́вьях | деревьj- |
|---|
| имена́ / времена́ | в имена́х / времена́х | -мен- plural stem |
|---|
| де́ньги | о де́ньгах | plural-only |
|---|
| но́жницы | о но́жницах | plural-only |
|---|
Plural locations with в
в + prepositional plural locates entities inside multiple places or within plural domains.
- A plural can describe genuinely multiple locations or a general class of places. Russian number choice still reflects the intended construal, not the case ending.
- Sound group: The preposition в is unstressed and assimilates to nearby consonants in speech. Keep the written preposition stable while stressing the noun correctly: в города́х, в шко́лах.
08.05 Plural locations with в
| Phrase | Example sentence |
|---|
| в города́х | Мы рабо́таем в ра́зных города́х. |
|---|
| в шко́лах | Де́ти у́чатся в но́вых шко́лах. |
|---|
| в музе́ях | Карти́ны храня́тся в музе́ях. |
|---|
| в зда́ниях | В э́тих зда́ниях есть ли́фты. |
|---|
| в леса́х | В се́верных леса́х хо́лодно. |
|---|
Plural locations with на
на + prepositional plural extends the same lexical place categories learned in the singular.
- Plural does not erase lexical preposition choice: в музе́ях but на вы́ставках; в о́фисах but на рабо́чих места́х.
- Meaning check: Do not pluralise a fixed singular phrase without checking the intended meaning. на рабо́те 'at work' is much more frequent than на рабо́тах unless multiple works or job sites are meant.
08.06 Plural locations with на
| Phrase | Typical category |
|---|
| на стола́х | surfaces |
|---|
| на у́лицах | conventional public-space frame |
|---|
| на заня́тиях | events/classes |
|---|
| на острова́х | islands |
|---|
| на ста́нциях | conventional sites |
|---|
| на рабо́тах | multiple works/jobs only in suitable context |
|---|
Topics, circumstances, and transport
о/об marks plural topics; при marks presence or circumstances; на can describe transport or medium.
- Transport expressions are lexical and construal-sensitive: е́хать на по́езде uses prepositional singular, while е́хать по́ездом uses instrumental singular. Both can express means with different framing.
- Case network: A preposition can contribute several related meanings, but it still governs a specific case in each construction.
08.07 Topics, circumstances, and transport
| Preposition | Example | Relation |
|---|
| о | о пи́сателях; о друзья́х | topic |
|---|
| об | об имена́х; об усло́виях | topic before vowel |
|---|
| при | при де́тях | in the children's presence |
|---|
| при | при таки́х усло́виях | under such conditions |
|---|
| на | е́здить на поезда́х | by trains / using trains |
|---|
| на | рабо́тать на компью́терах | using/on computers |
|---|
Goal versus location in the plural
Accusative plural names the goal; prepositional plural names the setting.
- A movement verb does not decide alone: ходи́ть в магази́нах can mean walking around inside shops, whereas ходи́ть в магази́ны presents shops as repeated destinations.
- Three-part diagnostic: preposition + intended relation + case form. Never use only the verb's English translation.
08.08 Goal versus location in the plural
| Destination - accusative | Location - prepositional |
|---|
| е́хать в города́ | жить в города́х |
|---|
| заходи́ть в магази́ны | быть в магази́нах |
|---|
| лете́ть на острова́ | жить на острова́х |
|---|
| идти́ на заня́тия | быть на заня́тиях |
|---|
Stress, pronunciation, and full agreement
The ending is regular, but plural stem stress and every agreeing word still require attention.
- Unstressed -ах/-ях is short in connected speech, but х remains audible. Stress can move with the plural stem: го́род - города́ - в города́х; слова́рь - словари́ - в словаря́х.
- Agreement scan: All modifiers in the noun phrase must be prepositional plural: в э́тих но́вых города́х. Do not leave one word in nominative.
08.09 Stress, pronunciation, and full agreement
| Noun | Prepositional plural | Full phrase |
|---|
| го́род | в города́х | в э́тих но́вых города́х |
|---|
| музе́й | в музе́ях | в э́тих интере́сных музе́ях |
|---|
| учи́тель | об учителя́х | об о́пытных учителя́х |
|---|
| мо́ре | на моря́х | на тёплых моря́х |
|---|
| лю́ди | о людя́х | о ра́зных людя́х |
|---|
Prepositional plural assessment
Choose the plural stem, select -ах/-ях, and verify the preposition and relation.
- Assessment
- Form: в + города́, кни́ги, о́кна.
- Form: в + музе́и, словари́, зда́ния.
- Form: о + лю́ди, де́ти, друзья́, де́ньги.
- Contrast destination and location with острова́.
- Explain why в лесу́ has plural в леса́х, not a plural -у form.
- Answers and explanations
- в города́х, кни́гах, о́кнах.
- в музе́ях, словаря́х, зда́ниях.
- о людя́х, де́тях, друзья́х, де́ньгах.
- лете́ть на острова́; жить на острова́х.
- в э́тих но́вых города́х; об о́пытных учителя́х.
- The second locative is a restricted singular form; plural uses ordinary prepositional morphology.
- Ready signal: Continue when irregularity feels concentrated in the plural stem and -ах/-ях itself feels predictable.
- Build: in these new cities; about experienced teachers.