The Verb Быть (To Be) | Russian Grammar

The most important verb in the language is the one that, in the present tense, you mostly don't say. Russian's быть ("to be") has essentially no present tense: where English needs am / is / are, Russian leaves a gap. "I am a student" is just Я студе́нт — two words, no verb. This zero copula is the first real shock for English speakers, and inserting a "be" word where Russian wants silence (Я есть студе́нт) is an instantly recognizable foreigner mistake. The verb does come fully to life in the *past (был, была́, бы́ло, бы́ли — agreeing by gender) and the future (бу́ду, бу́дешь, бу́дет…), and that future doubles as the engine of the imperfective future tense. This page covers all three time-frames and the case quirk that comes with them.

Present tense: the zero copula

In the present, you simply juxtapose the subject and the predicate with no verb between them. This works for naming someone's profession or identity, describing them, and saying where they are.

Я студе́нт.

I am a student. — subject + noun, no verb. (A woman says: Я студе́нтка.)

Она́ до́ма.

She is home. — subject + adverb, no verb.

Он о́чень у́мный.

He is very smart. — subject + adjective, no verb.

Мы из Кана́ды.

We are from Canada. — subject + prepositional phrase, no verb.

The same goes for "I'm tired," "she's busy," "they're at work" — there is never an am / is / are to translate:

Я уста́л.

I'm tired. (ustál — said by a man; a woman says уста́ла.) Note: no 'am'.

Они́ сейча́с на рабо́те.

They're at work right now. — no 'are'.

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The single most common быть error is supplying a present-tense copula by reflex. "I am a student" is Я студе́нт — never Я есть студе́нт. Train yourself to feel the gap as correct: in the Russian present, subject and predicate sit side by side, and the silence between them is the verb.

The dash for "is" in writing

When both sides of the equation are nouns (especially in definitions and equations), written Russian often marks the missing copula with a dash — a tiny visual stand-in for "is":

Москва́ — столи́ца Росси́и.

Moscow is the capital of Russia. — the dash replaces 'is' between two nouns.

Мой брат — врач.

My brother is a doctor. — noun = noun, marked with a dash.

You don't pronounce the dash; it's a punctuation convention. With an adjective or adverb predicate (Она́ до́ма, Он у́мный) no dash is used.

Есть: the one surviving present form

Быть does keep one present-tense form, есть, but it is not an ordinary "is." It survives only to assert existence or possession emphatically — "there does exist," "X does have." It answers the question "is there any?" rather than "what is X like?"

У меня́ есть маши́на.

I do have a car. — есть asserts possession (lit. 'by me there-is a car').

Здесь есть Wi-Fi?

Is there Wi-Fi here? — есть asks about existence/availability.

В го́роде есть хоро́ший музе́й.

There's a good museum in the city. — есть = 'there exists'.

The line is sharp: use есть for whether something exists / is available, but omit it when you describe what something is like or where it is as plain fact. "I have a red car" (describing the car you have) drops есть: У меня́ кра́сная маши́на — the focus is the colour, not the bare existence. The full possession frame, including this есть-or-not choice, is on the у + genitive possession page, and its negative counterpart (нет + genitive) on I have no….

— У тебя́ есть вре́мя? — Да, есть.

'Do you have time?' 'Yes, I do.' — есть both asks and confirms availability.

Past tense: был, была́, бы́ло, бы́ли

In the past, быть behaves like a normal Russian past-tense verb — which means it agrees in gender and number, not person. There are exactly four forms:

Subject	Form	Stress	Example
masculine	был	был	Он был до́ма.
feminine	была́	была́ (on the ending!)	Она́ была́ до́ма.
neuter	бы́ло	бы́ло	Э́то бы́ло вчера́.
plural	бы́ли	бы́ли	Они́ бы́ли до́ма.

Вчера́ я был на рабо́те весь день.

Yesterday I was at work all day. (был — said by a man).

Вчера́ я была́ на рабо́те весь день.

Yesterday I was at work all day. (была́ — said by a woman; stress on the ending).

Они́ бы́ли о́чень ра́ды нас ви́деть.

They were very glad to see us. — plural бы́ли.

The form depends on the subject's gender, which for "I / you" means the speaker's or addressee's sex: a man says я был, a woman says я была́; you ask a man Ты был? but a woman Ты была́?

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Watch the stress: был, бы́ло, бы́ли all stress the stem, but the feminine была́ jumps the stress to the ending. This stress shift is a fixed, irregular feature of был — and it returns (mirror-image) in the negative, where не́ был, не́ было, не́ были pull the stress onto the particle не́, while the feminine stays не была́. There's a whole page on this oddity: был: special stress.

Его́ вчера́ не́ было на собра́нии.

He wasn't at the meeting yesterday. — negative existential не́ было, stress on не́ (and here + genitive его́).

Future tense: бу́ду, бу́дешь, бу́дет…

Unlike the present, the future of быть is a full, regular conjugation — and it agrees by person and number like an ordinary present-tense verb:

Person	Form	Example
я	бу́ду	Я бу́ду до́ма.
ты	бу́дешь	Ты бу́дешь до́ма?
он / она́ / оно́	бу́дет	Он бу́дет до́ма.
мы	бу́дем	Мы бу́дем до́ма.
вы	бу́дете	Вы бу́дете до́ма?
они́	бу́дут	Они́ бу́дут до́ма.

За́втра я бу́ду до́ма весь день.

Tomorrow I'll be home all day. — future бу́ду.

Ты бу́дешь на ве́черинке в суббо́ту?

Will you be at the party on Saturday? — future бу́дешь.

Бу́ду as the imperfective-future auxiliary

This same conjugation does double duty: бу́ду + an imperfective infinitive builds the imperfective future ("will be doing"). It's the closest Russian gets to a "will" auxiliary, and you use it constantly.

Ве́чером я бу́ду чита́ть.

I'll be reading this evening. — бу́ду + imperfective чита́ть = imperfective future.

Что ты бу́дешь де́лать в выходны́е?

What will you be doing this weekend? — бу́дешь + де́лать.

This auxiliary works only with imperfectives. Perfective verbs make their own future from present-tense endings (прочита́ю, "I'll read it through"), so you never say *бу́ду прочита́ть. The full split is on the imperfective compound future page.

Predicate nouns go instrumental in the past and future

Here is a case quirk that catches every learner. When быть is spoken — that is, in the past or future — a predicate noun that names a role, profession, or temporary state shifts into the instrumental case, not the nominative:

Он был врачо́м.

He was a doctor. — врач → instrumental врачо́м after past быть.

Я хочу́ стать учи́телем.

I want to become a teacher. — учи́тель → instrumental учи́телем (стать 'to become' takes the same instrumental).

Она́ бу́дет хоро́шим врачо́м.

She'll be a good doctor. — future быть + instrumental врачо́м (with adjective хоро́шим also instrumental).

Contrast this with the present, where the predicate noun stays nominative because there's no verb: Он врач (He is a doctor, nominative) but Он был врачо́м (He was a doctor, instrumental). The pattern is easy to remember as a rule: no verb → nominative; verb present (past/future) → instrumental noun. The mechanics live on the instrumental as predicate page.

Time	Verb?	Predicate noun	Example
Present	none	nominative	Он врач.
Past	был	instrumental	Он был врачо́м.
Future	бу́дет	instrumental	Он бу́дет врачо́м.

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The instrumental is the default for predicate nouns whenever быть is overt, but it's most natural for changeable roles and temporary states (jobs, phases of life). For permanent identities some writers keep the nominative in the past, but at A1 the safe, always-correct choice is: past/future быть → instrumental noun. Adjectives after быть have their own short/long-form story — covered elsewhere — so this rule is about predicate nouns.

Common Mistakes

❌ Я есть студе́нт.

Wrong — there is no ordinary present 'to be'. Drop it entirely: Я студе́нт. (есть is only for emphatic existence/possession.)

✅ Я студе́нт.

I am a student.

❌ (a woman saying) Вчера́ я был до́ма.

Wrong for a female speaker — был agrees with gender, so a woman says была́.

✅ Вчера́ я была́ до́ма.

Yesterday I was home. (said by a woman)

❌ За́втра я бу́ду прочита́ть кни́гу.

Wrong — бу́ду pairs only with imperfectives. With a perfective, use its own simple future: прочита́ю.

✅ За́втра я прочита́ю кни́гу.

Tomorrow I'll read the book (through). / За́втра я бу́ду чита́ть. = I'll be reading.

❌ Он был врач.

Wrong — after past быть a predicate noun goes instrumental: врачо́м, not nominative врач.

✅ Он был врачо́м.

He was a doctor.

❌ Мой брат врач.

Not wrong, but written Russian marks the missing copula between two nouns with a dash: Мой брат — врач.

✅ Мой брат — врач.

My brother is a doctor. (dash for the omitted 'is')

Key Takeaways

Present быть is omitted — there is no am/is/are. Я студе́нт, Она́ до́ма, Он у́мный. Inserting *есть as an ordinary copula is wrong.
есть survives only for emphatic existence/possession ("there is," "do have"): У меня́ есть маши́на, Здесь есть Wi-Fi.
Past agrees by gender/number: был / была́ / бы́ло / бы́ли — so "I was" is был (man) or была́ (woman). Mind the stress: была́ (ending) but не́ был / не́ было / не́ были (particle), with feminine не была́.
Future conjugates normally (бу́ду, бу́дешь, бу́дет, бу́дем, бу́дете, бу́дут) and doubles as the imperfective-future auxiliary (бу́ду чита́ть) — never with a perfective.
Predicate nouns go instrumental when быть is overt (past/future): Он был врачо́м, Она́ бу́дет врачо́м — but nominative in the verbless present (Он врач).

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