Indefinite Pronouns in Russian

In Brief

Russian forms most indefinite pronouns and adverbs from question words such as кто “who,” что “what,” and где “where.” Use -то for a particular but unidentified person or thing, -нибудь for an open or unrestricted choice, formal -либо for much the same open meaning, and кое- when the speaker has someone or something particular in mind but does not name it.

Overview

Indefinite pronouns stand in for people or things without identifying them exactly: “someone,” “something,” and “anyone” are English examples. Russian also creates indefinite adverbs—words giving information such as place, time, or manner—with the same markers: где-то “somewhere,” когда-нибудь “sometime,” and как-либо “in any way.”

The building blocks are familiar question words: кто (who), что (what), какой (which/what kind), чей (whose), где (where), куда (where to), откуда (where from), когда (when), and как (how). The marker is not merely a different translation of “some.” It tells the listener how definite the speaker’s idea is and whether the choice is open.

At B2, the main challenge is therefore selection, not memorization. English “someone” can correspond to either кто-то or кто-нибудь, depending on the situation. Russian also changes pronouns for case (the form that marks a word’s job in a sentence), so learners must recognize forms such as кого-то, кому-нибудь, and кое с кем as members of the same system.

How It Works

The four main markers

Marker	Core meaning	Typical situation	Example
-то	a particular person, thing, place, or time that is unidentified or not being identified	statements about actual events; evidence that something exists	Кто-то стучит. — Someone is knocking.
-нибудь	any suitable member of a set; identity is open or unimportant	requests, commands, conditions, possibilities, open questions	Спроси кого-нибудь. — Ask someone/anyone.
-либо	any; no matter which	formal, official, academic, or carefully written language	без каких-либо причин — without any reasons
кое-	a particular person or thing known to the speaker but deliberately left unnamed	hints, partial disclosure, discretion	Я кое-что узнал. — I found out something.

All four are written with a hyphen: кто-то, что-нибудь, кто-либо, кое-кто. With кое-, however, a preposition comes between the marker and the pronoun: кое с кем “with a certain person,” кое у кого “at a certain person’s place/from a certain person,” and кое о чём “about something.”

Choosing between -то and -нибудь

This is the central contrast.

Use -то when the sentence points to an actual, particular referent (the person or thing meant), even if the speaker does not know its identity:

• Кто-то оставил зонт. Someone left an umbrella.
• Я где-то видел эту фотографию. I have seen this photograph somewhere.
• Он почему-то молчит. For some reason, he is silent.

Use -нибудь when no particular choice has been established. It often appears in commands, requests, future possibilities, conditions, and questions asking whether any option exists:

• Возьми что-нибудь почитать. Take something to read—anything suitable.
• Если кто-нибудь позвонит, запиши номер. If anyone calls, write down the number.
• Здесь есть где-нибудь банкомат? Is there an ATM anywhere around here?

A useful test is: “Do I mean one real but unidentified X, or will any X that fits do?” The first usually takes -то; the second usually takes -нибудь.

English does not always preserve this distinction. “I need someone to help” normally leaves the person open, so Russian has Мне нужен кто-нибудь, кто поможет. But “Someone is waiting for you” reports a real waiting person, so it has Тебя кто-то ждёт.

-либо: the formal open-choice form

-либо is close in meaning to -нибудь, but it sounds more formal and categorical. It is common in regulations, contracts, questionnaires, journalism, and academic prose:

• Имеются ли какие-либо ограничения? Are there any restrictions?
• Он отказался давать какие-либо объяснения. He refused to give any explanation.
• Без чьей-либо помощи means “without anyone’s help.”

In ordinary conversation, -нибудь is usually more natural. Russian also has the separate conjunction либо ... либо ..., meaning “either ... or ...”; it is written without a hyphen when it stands alone: Либо сегодня, либо завтра “Either today or tomorrow.”

кое-: known, but not named

With кое-, the speaker has a particular referent in mind. The form can suggest secrecy, tact, teasing, or simply that the details are not relevant yet:

• Мне надо кое с кем поговорить. I need to talk to a certain person.
• У меня есть кое-какие идеи. I have a few ideas/some particular ideas.
• Кое-кто уже знает правду. Certain people already know the truth.

Context and intonation matter. Я кое-что о тебе слышал can be neutral (“I have heard a thing or two about you”), intriguing, or mildly threatening.

Case and agreement

The marker stays unchanged; the question-word part carries the case ending. A direct object is the person or thing directly affected by an action; an indirect object commonly marks the recipient, as in “to someone.” Russian marks these roles through case forms.

Role	кто-то	кто-нибудь	кое-кто
subject	кто-то	кто-нибудь	кое-кто
“of/from someone” or animate direct object	кого-то	кого-нибудь	кое-кого
“to someone”	кому-то	кому-нибудь	кое-кому
“with someone”	с кем-то	с кем-нибудь	кое с кем
“about someone”	о ком-то	о ком-нибудь	кое о ком

The same pattern applies to что: чего-то, чему-нибудь, с чем-либо, кое о чём. Notice the spelling чём after a preposition.

Forms built from какой and чей behave like adjectives: they agree with the noun in gender, number, and case. Какой-то мужчина is “some man,” какая-то женщина is “some woman,” and какие-то документы is “some documents.” Compare с каким-нибудь специалистом “with any suitable specialist” and без каких-либо доказательств “without any evidence.” Adverbs such as где-то, куда-нибудь, and когда-либо do not decline.

Examples in Context

Russian	English	Note
Кто-то звонил тебе.	Someone called you.	A real caller, identity unknown.
Позвони кому-нибудь.	Call someone—anyone suitable.	Open choice after a command.
Где-нибудь есть аптека?	Is there a pharmacy somewhere around here?	Asks whether any location fits.
Я кое-что слышал.	I heard something.	The speaker knows what but withholds it.
В коридоре кто-то разговаривает.	Someone is talking in the corridor.	Evidence of a particular person.
Если что-нибудь изменится, сообщи мне.	If anything changes, let me know.	An open future condition.
Давай встретимся где-нибудь в центре.	Let’s meet somewhere in the city center.	The exact place is still open.
Мы где-то встречались.	We have met somewhere before.	A real place the speaker cannot recall.
Вы заметили какие-либо ошибки?	Did you notice any errors?	Formal or careful wording.
Документ нельзя передавать кому-либо ещё.	The document must not be passed to anyone else.	Formal prohibition.
Мне нужно кое с кем посоветоваться.	I need to consult a certain person.	The preposition splits кое- from кем.
Она принесла кое-какие документы.	She brought a few particular documents.	кое-какие agrees with a plural noun.
Когда-нибудь я выучу русский в совершенстве.	Someday I will master Russian.	Unspecified future time.
Он почему-то не ответил.	For some reason, he did not answer.	The reason is unknown or unexplained.

Common Mistakes

Using -то when the choice is open

• Wrong: Если кто-то позвонит, запиши номер. (when you mean “if anyone at all calls”)
• Right: Если кто-нибудь позвонит, запиши номер.
• Why: A condition about an unknown future caller normally leaves the identity open. Кто-то would suggest a more particular person already expected or inferable.

Using -нибудь for an observed fact

• Wrong: Кто-нибудь стучит в дверь.
• Right: Кто-то стучит в дверь.
• Why: The knocking proves that a particular person is there. This is not a free choice among possible people.

Forgetting the hyphen

• Wrong: кто то, что нибудь, кое кто
• Right: кто-то, что-нибудь, кое-кто
• Why: These particles attach with a hyphen. The exception in structure is a preposition: кое с кем, not с кое-кем.

Leaving the pronoun in the nominative form

• Wrong: Я поговорил с кто-то.
• Right: Я поговорил с кем-то.
• Why: After с meaning “with,” кто changes to кем. The suffix -то does not change.

Treating -либо as everyday neutral speech

• Awkward in casual conversation: Давай пойдём куда-либо поесть.
• Natural: Давай пойдём куда-нибудь поесть.
• Why: -либо is grammatical, but it often sounds official or bookish where conversational Russian prefers -нибудь.

Confusing indefinite and negative pronouns

• Wrong: Я не видел кого-нибудь. (for the simple meaning “I saw nobody”)
• Right: Я никого не видел.
• Why: Russian normally uses a ни- pronoun together with a negated verb for “nobody/nothing.” Кого-нибудь remains possible in special contrasts or questions, but it is not the default negative form.

Usage Notes

Questions do not automatically require one suffix

The speaker’s assumption determines the form. Кто-нибудь звонил? asks whether anyone called at all. Кто-то звонил? asks whether a call from some actual but unidentified person occurred, often because there is evidence or an expectation. Likewise, Ты что-нибудь купил? means “Did you buy anything?”, while Ты что-то купил? can mean “Did you buy something?” when the speaker suspects that you did.

-то can signal vagueness, not only ignorance

A speaker may know the identity but consider it irrelevant, avoid naming it, or use -то to soften precision. Надо найти какое-то решение means “We need to find some solution,” often implying that a solution is needed without yet specifying which one. With adjectives, какой-то can also carry an evaluative shade: какой-то странный шум is “some strange noise” or “a rather strange noise.”

Frequency and register

-то and -нибудь are extremely common in speech and writing. Кое- is also normal, but often carries a pragmatic effect: the speaker signals access to information while limiting what is revealed. -либо belongs especially to formal written Russian, although fixed forms such as когда-либо “ever” and кто-либо “anyone” also occur in elevated or emphatic contexts.

Beyond the Basics / Advanced Use

Indefinite forms under negation

The simple contrast is кто-нибудь “anyone” versus никто “nobody,” but actual usage depends on scope—what exactly the negative affects. Compare:

• Я никого не пригласил. I invited nobody.
• Я не хочу приглашать кого-нибудь случайного. I do not want to invite just anyone random.
• Он ушёл, не сказав кому-либо ни слова. He left without saying a word to anyone. (formal)

The second sentence does not claim that no invitation will happen; it rejects an unrestricted kind of person. This is why an indefinite pronoun can remain inside a negative sentence.

Free-choice and “ever” meanings

In broad statements, кто угодно and что угодно often express unrestricted “anyone/anything” more strongly than кто-нибудь and что-нибудь: Это может сделать кто угодно “Anyone can do that.” Similarly, где угодно means “anywhere at all.” These угодно forms are related in meaning but belong to a separate pattern.

Когда-либо often means “ever,” especially in formal questions and comparisons: Это лучший фильм, который я когда-либо видел “This is the best film I have ever seen.” Conversational Russian often uses когда-нибудь in an open question: Ты когда-нибудь был в Сибири? “Have you ever been to Siberia?” The distinction is partly one of register and construction rather than a rigid one-to-one rule.

Pronouns versus indefinite adverbs

Not every form replaces a noun. Кто-то and что-нибудь are pronouns, while где-то, куда-нибудь, откуда-то, когда-либо, как-то, and почему-то function as adverbs. Two forms deserve special attention:

• как-то can mean “somehow,” but in storytelling it can also mean “once”: Как-то вечером он мне позвонил — “One evening, he called me.”
• почему-то usually means “for some reason,” often with the implication that the reason is puzzling or unavailable.

These meanings are best learned as complete expressions rather than assembled word by word each time.

Practice Tips

1. Sort by situation, not translation. Take short English prompts containing “someone,” “something,” or “somewhere” and label each one “actual but unidentified,” “open choice,” “formal any,” or “known but withheld” before choosing the Russian form.
2. Decline one family aloud. Practice кто-то — кого-то — кому-то — с кем-то — о ком-то, then repeat with -нибудь. This separates the changing case form from the fixed suffix.
3. Listen for the speaker’s assumption. In Russian dialogue, pause at questions containing -то or -нибудь. Ask whether the speaker expects a particular referent to exist or is checking all possibilities.

Related Concepts

• Prerequisite: Personal Pronouns (Nominative) — provides the basic idea of pronouns and how they stand for people or things.