To say "Moscow is the capital of Russia," Russian uses no verb at all in the present tense — it simply juxtaposes the two halves, and where both are nouns, a dash fills the gap left by the missing "is": Москва́ — столи́ца Росси́и. This zero-copula present is one of the first things that makes Russian feel different from English. But the verb is not gone forever: in the past and future it returns as был / бу́дет — and when it does, it forces the predicate noun out of the nominative and into the instrumental case. Mastering nominal sentences means mastering exactly when the verb appears and what case it drags along with it.
The present tense: no verb, sometimes a dash
Russian has no present-tense form of "to be" (быть) in equational sentences. "I am a student" is literally "I student":
Я студе́нт.
I'm a student. — no verb; pronoun subject, so no dash.
Она́ врач.
She's a doctor. — pronoun subject, no dash, no verb.
When the subject is a pronoun (я, ты, он, она́, мы…), you simply put it next to the predicate — no dash. But when both halves are nouns, Russian inserts a dash (—) in writing to mark the slot where the verb would be. Read aloud, it's a short pause:
Москва́ — столи́ца Росси́и.
Moscow is the capital of Russia. — noun = noun, so a dash stands for the missing 'is'.
Мой брат — врач.
My brother is a doctor. — noun subject (мой брат) = noun predicate (врач): dash.
Чте́ние — моё хо́бби.
Reading is my hobby. — noun = noun, dash.
No dash with э́то
The demonstrative э́то ("this is / that is / these are") also takes no dash — it already does the linking work itself:
Э́то стол.
This is a table. — э́то linker, no dash.
Э́то моя́ сестра́.
This is my sister. — э́то, no dash, no verb.
So three subject types skip the dash — pronoun subjects (Я студе́нт), э́то (Э́то стол), and short colloquial replies — while two full nouns facing each other take it (Мой брат — врач).
Past and future: the verb returns as был / бу́дет
The verb быть is absent only in the present. In the past it surfaces as был / была́ / бы́ло / бы́ли (agreeing with the subject in gender and number), and in the future as бу́ду / бу́дешь / бу́дет / бу́дем / бу́дете / бу́дут (agreeing in person and number). The dash disappears, because now there's a real verb:
Мой брат был студе́нтом.
My brother was a student. — past: был + instrumental студе́нтом (not nominative студе́нт).
Она́ бу́дет учи́тельницей.
She'll be a teacher. — future: бу́дет + instrumental учи́тельницей.
Notice the predicate noun is no longer студе́нт / учи́тельница (nominative) — it's студе́нтом / учи́тельницей. This is the heart of the page.
The instrumental predicate
When быть actually appears (past or future), the predicate noun takes the instrumental case. This feels alien to English speakers, because English keeps the predicate noun unchanged across tenses: "he is a doctor / he was a doctor / he will be a doctor" — doctor never moves. Russian does move it:
| Tense | Sentence | Predicate case |
|---|---|---|
| Present | Он врач. | nominative (врач) |
| Past | Он был врачо́м. | instrumental (врачо́м) |
| Future | Он бу́дет врачо́м. | instrumental (врачо́м) |
Ра́ньше она́ была́ медсестро́й, а тепе́рь она́ врач.
She used to be a nurse, and now she's a doctor. — past была́ + instrumental медсестро́й; present врач stays nominative.
Когда́ я вы́расту, я бу́ду инжене́ром.
When I grow up, I'll be an engineer. — future бу́ду + instrumental инжене́ром.
The logic: with a verb present, the predicate noun describes a role the subject occupies for a time, and Russian marks "occupying a role / being characterised as" with the instrumental. The present врач is the one exception — a timeless, unframed identity needs no verb and so no instrumental. The full case story is on the instrumental predicate.
Formal явля́ться + instrumental
In formal, academic, and journalistic writing, Russian often replaces the bare present-tense dash with the verb явля́ться ("to be / to constitute"), which — being a real verb — also takes the instrumental:
Москва́ явля́ется столи́цей Росси́и.
Moscow is the capital of Russia. (formal/academic) — явля́ться + instrumental столи́цей.
Э́тот докуме́нт явля́ется официа́льным.
This document is official. (formal) — явля́ться + instrumental официа́льным.
In everyday speech you'd say Москва́ — столи́ца Росси́и with the dash; явля́ться (formal) belongs to reports, contracts, and lectures. Knowing both lets you read a newspaper and chat at a café with the right register each time.
Common Mistakes
❌ Я есть студе́нт.
Wrong — there is no present-tense 'is/am' in equational sentences. есть means 'there exists', not the copula 'am'. Just Я студе́нт.
✅ Я студе́нт.
I'm a student. — zero copula, no dash (pronoun subject).
❌ Москва́ столи́ца Росси́и.
Wrong (in writing) — two nouns facing each other need a dash for the missing 'is'.
✅ Москва́ — столи́ца Росси́и.
Moscow is the capital of Russia. — noun — noun: dash.
❌ Мой брат был студе́нт.
Wrong — once был appears, the predicate noun must be instrumental: студе́нтом, not nominative студе́нт.
✅ Мой брат был студе́нтом.
My brother was a student. — был + instrumental студе́нтом.
❌ Она́ бу́дет учи́тельница.
Wrong — future бу́дет forces the instrumental: учи́тельницей, not nominative учи́тельница.
✅ Она́ бу́дет учи́тельницей.
She'll be a teacher. — бу́дет + instrumental учи́тельницей.
❌ Я — студе́нт.
Wrong — a pronoun subject takes no dash; the dash is only for two facing nouns.
✅ Я студе́нт.
I'm a student. — pronoun subject, no dash.
Key Takeaways
- The present tense has no copula: Я студе́нт, Он врач — just juxtapose the two halves.
- Noun — noun takes a dash (Москва́ — столи́ца Росси́и); pronoun subjects and э́то do not (Я студе́нт, Э́то стол).
- In the past and future the verb returns as был / бу́дет, the dash disappears, and the predicate noun goes instrumental (Он был врачо́м, Она́ бу́дет учи́тельницей).
- The rule of thumb: no verb → nominative; verb present → instrumental.
- Formal register uses явля́ться + instrumental (Москва́ явля́ется столи́цей) instead of the everyday dash.
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Start learning Russian→Related Topics
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