Cases in Russian

Russian uses six grammatical cases to show the role of nouns in a sentence. Think of cases as different "hats" a noun wears depending on its job: doer, target, owner, receiver, tool, or topic.

Why Cases Matter

Unlike English, which relies on word order, Russian marks each noun's role with its ending. That's why word order is flexible — and why endings are worth your attention. The encouraging part: you've already used cases if you followed the roadmap. У меня нет времени (genitive), я иду в школу (accusative), мне 25 лет — all cases in action.

Case	Function	Question	Example

Nominative Case (Именительный падеж)

The dictionary form. Used for the subject — whoever or whatever does the action — and after это:

Студент читает книгу.

The student is reading a book.

Note: Студент is nominative — he's doing the reading.

Это моя сестра.

This is my sister.

Note: After это, the noun stays in its dictionary form.

Accusative Case (Винительный падеж)

The direct object — the thing the action lands on — and the destination of motion (в/на + accusative):

Я читаю книгу.

I am reading a book.

Note: книга → книгу: feminine -а becomes -у.

Мы идём в школу.

We're going to school.

Note: Motion towards → accusative after в.

The endings, by gender:

Feminine -а → -у: книга → книгу, школа → школу
Masculine inanimate: no change: Я вижу стол (table looks the same)
Masculine animate: borrows the genitive: Я вижу брата
Neuter: no change: Я вижу окно

Я знаю Ивана, и я знаю его адрес.

I know Ivan, and I know his address.

Note: Иван is animate → Ивана; адрес is inanimate → unchanged.

Genitive Case (Родительный падеж)

The busiest case. Its jobs:

Possession: книга сестры (my sister's book)
Absence with нет: У меня нет машины (I don't have a car)
After numbers 2–4 (два часа) and quantity words: много воды
After prepositions у, из, без, для, от, до

Это машина моего брата.

This is my brother's car.

Note: 'Of my brother' → genitive: брат → брата.

В городе нет метро.

There's no metro in the city.

Note: нет + genitive — absence always takes genitive.

💬 The genitive in the wild

Core singular endings: feminine -а → -ы / -я → -и (школа → школы); masculine + -а (стол → стола); neuter -о → -а (окно → окна).

Dative Case (Дательный падеж)

The receiver — "to whom" something is given, said, or shown. Also after к (towards) and in age expressions:

Я даю книгу другу.

I give the book to my friend.

Note: друг → другу: the receiver takes dative.

Мне нравится этот город.

I like this city. (lit. To-me is-pleasing this city.)

Note: нравиться works through the dative — the liker is the receiver.

Core singular endings: masculine + -у (брат → брату); feminine -а → -е (сестра → сестре); neuter -о → -у (окно → окну).

Instrumental Case (Творительный падеж)

The tool ("with what") and the companion (с + instrumental):

Я пишу ручкой.

I write with a pen.

Note: The tool takes instrumental with NO preposition: ручка → ручкой.

Я гуляю с собакой.

I'm walking with the dog.

Note: Company needs с: собака → собакой.

Core singular endings: masculine + -ом (стол → столом); feminine -а → -ой (мама → мамой); neuter -о → -ом (окно → окном).

Prepositional Case (Предложный падеж)

The only case that never appears without a preposition — hence the name. Two jobs: location (в/на = in/at) and topic (о = about):

Я живу в Москве и работаю в банке.

I live in Moscow and work in a bank.

Note: Location: Москва → Москве, банк → банке.

Мы говорим о музыке.

We're talking about music.

Note: Topic with о: музыка → музыке.

The friendliest case: nearly everything ends in -е (школа → в школе, стол → на столе, окно → в окне).

The Endings, All Together

Don't memorize this table in one sitting. Practice a case at a time — the exercises below mix them gradually, and the patterns become reflexes through repetition, not study.

Common Mistakes

Learning cases as abstract theory. Anchor each case to a trigger: нет → genitive, даю → dative, с → instrumental, о → prepositional.
Forgetting animate accusative. Я вижу брата (not брат) — animate masculine borrows genitive.
Using nominative after prepositions. A preposition always forces a case; в Москва is never correct.
Panicking. Russians understand you even with wrong endings. Cases are polish, not a gate — keep speaking while you drill.

What You Can Do Now

You can decode why any noun ends the way it does, and produce the right form in the most common patterns. Practice below — the generator gives you fresh sentences every session.