If you’re starting to learn Russian, you’ve probably heard people talk about “cases.” For many beginners, noun cases seem like a complex part of Russian grammar.

Cases are actually very logical. In fact, you already use cases in English without even realizing it.

For example, we say “He sees me” but “I see him.” The word changes from he to him depending on its job in the sentence. Russian does the exact same thing, but it changes the endings of all nouns, not just pronouns.

Another great piece of news is that Russian grammar is incredibly standard. While you might hear slight accent differences between Moscow, Siberia, and the Russian Far East, the noun cases are identical everywhere. You won’t need to learn regional variations for grammar!

Let’s break down the six Russian noun cases simply and clearly.

What are Russian noun cases?

In English, we rely on word order to understand a sentence. “The dog bit the man” means something completely different than “The man bit the dog.”

In Russian, word order is very flexible. You can mix the words up, and the sentence will still mean the exact same thing! How is this possible? Because of cases.

Cases are simply changes made to the end of a noun to show what “job” that noun is doing in the sentence. Is it the subject? Is it the object? Is it showing possession? The ending of the word will tell you.

To show you how cases work, we’re going to look at how the Russian word for “sister” (сестра) changes in each of the six cases.

Nominative case: the subject

The nominative case is the easiest one. It’s the dictionary form of the word.

You use the nominative case when the noun is the subject of the sentence. The subject is the person or thing doing the action. It answers the questions Кто? (Who?) or Что? (What?).

Here, the word remains exactly as you’d find it in a dictionary: сестра.

Genitive case: possession and absence

The genitive case is primarily used to show possession, similar to using an apostrophe-s (‘s) or the word “of” in English. It answers the questions Кого? (Of whom?) or Чего? (Of what?).

You’ll also use the genitive case when you’re talking about the absence of something (using the word “no” or “none”).

Notice how the ending changes from an “а” to an “ы” (сестры).

Dative case: the receiver

The dative case is used for the indirect object of a sentence. It shows who or what is receiving an action.

In English, we usually show this by putting the words “to” or “for” in front of the noun. It answers the questions Кому? (To whom?) or Чему? (To what?).

Watch how the ending turns into an “е” (сестре).

Accusative case: the direct object

The accusative case is used for the direct object. This is the person or thing that the action is happening directly to. It answers the questions Кого? (Whom?) or Что? (What?).

If you read a book, love your family, or eat an apple, the book, family, and apple will all be in the accusative case.

Here, the ending changes to a “у” (сестру).

Instrumental case: the tool or companion

The instrumental case gets its name because it tells you what “instrument” or tool you’re using to do something. For example, writing with a pen or eating with a fork.

It’s also used to show who you’re doing an action with (as a companion). It answers the questions Кем? (With whom?) or Чем? (With what?).

The ending here becomes “ой” (сестрой).

Prepositional case: locations and topics

The prepositional case is unique because it’s never used on its own. It’s always used together with a preposition, usually “in” (в), “on” (на), or “about” (о).

You use it when you’re talking about the location of something, or the topic of your thoughts and conversations. It answers the questions О ком? (About whom?) or О чём? (About what?).

The ending changes to an “е” (сестре), which is exactly the same as the dative case! This makes it a bit easier to memorize.

Summary table of Russian cases

To help you study, here’s a simple reference table showing all six Russian noun cases, what their main job is, and the questions they answer.

Learning Russian cases takes a little time and practice, but once you understand the basic job of each case, everything starts to click. Start by learning the nominative, accusative, and genitive cases first, as they’re the most common. Native speakers will still understand you even if you use the wrong case ending.