English uses it for two jobs that Russian keeps strictly separate. In "It's a book" you are identifying something — telling someone what it is. In "Where's the book? — It's on the table" you are referring back to a book already named. Russian uses э́то for the first job and он / она́ / оно́ for the second, and choosing the wrong one is one of the most persistent beginner errors. The good news: the rule is binary and reliable. Use э́то to identify or present; use он/она́/оно́ to refer back to a known noun by its gender. This page draws the line and drills it. For the frozen pointer on its own, see Это as a universal pointer; for the personal-pronoun forms, see personal pronoun forms.
Э́то — identifying and presenting ("this/that/it is…")
Э́то names or introduces something. It answers Что э́то? ("What is this?") and Кто э́то? ("Who is this?"). Crucially, it is frozen: it never changes for the gender or number of what follows. One masculine thing, one feminine person, a whole pile of things — all stay э́то.
Что э́то? — Э́то моя́ но́вая кни́га.
What's this? — It's my new book. — э́то identifies the thing; note it stays э́то even though кни́га is feminine.
Э́то мой друг Анто́н, мы вме́сте у́чимся.
This is my friend Anton, we study together. — presenting a person; frozen э́то, no agreement.
Э́то не пробле́ма, не волну́йся.
That's not a problem, don't worry. — э́то as the subject of an equational 'it is' sentence.
Because э́то is doing the work of "this is," there is no separate verb in the present (Russian has no present-tense "to be") — see nominal sentences and the dash for the wider picture.
Он / она́ / оно́ — referring back to a known noun
Once a noun is on the table, you stop naming it and start referring to it — and now you must match its gender: он for a masculine noun, она́ for a feminine noun, оно́ for a neuter noun (and они́ for a plural). This is true even for inanimate things: a table is "he" (стол → он), a book is "she" (кни́га → она́), a window is "it" (окно́ → оно́), because Russian gender is grammatical, not biological.
| Already-mentioned noun | Refer back with | Example |
|---|---|---|
| стол (masc.) | он | — Где стол? — Он в углу́. |
| кни́га (fem.) | она́ | — Где кни́га? — Она́ на столе́. |
| окно́ (neut.) | оно́ | Окно́ откры́то — оно́ выхо́дит во двор. |
| ключи́ (pl.) | они́ | — Где ключи́? — Они́ в карма́не. |
— Где моя́ су́мка? — Она́ под столо́м.
Where's my bag? — It's under the table. — су́мка is feminine, so we refer back with она́.
Купи́л но́вый телефо́н. Он рабо́тает о́чень бы́стро.
I bought a new phone. It works very fast. — телефо́н is masculine, so it's он, not э́то.
Putting them in sequence: name first, then refer
The two words naturally appear one after the other in real speech: you present something with э́то, then refer back to it with он/она́/оно́. Seeing them in sequence makes the division of labour obvious.
Э́то наш но́вый дом. Он ма́ленький, но о́чень ую́тный.
This is our new house. It's small but very cosy. — э́то presents (наш дом); the second sentence refers back with он (дом is masc.).
Э́то Мари́на. Она́ из Каза́ни и говори́т на трёх языка́х.
This is Marina. She's from Kazan and speaks three languages. — э́то introduces her; она́ refers back.
The distinguishing insight
The trap is built into English: it serves both as a presenter (it's a book) and as a referrer (it's on the table). Russian splits these because they are genuinely different acts. Presenting answers "what is this?" — the thing has no identity yet in the conversation, so you use the all-purpose, gender-blind э́то. Referring assumes the thing already has an identity — a specific noun with a specific gender — so the pronoun must echo that gender. The decisive question is therefore not about meaning but about information state: is the noun new to the conversation (→ э́то) or already established (→ он/она́/оно́)? When in English you could replace "it" with "this/that," you want э́то; when you could replace it with "he/she" pointing at a known thing, you want the gendered pronoun.
Common Mistakes
❌ — Где стол? — Э́то там.
Wrong — the table is already known, so you refer back by its gender, not present it again.
✅ — Где стол? — Он там.
Where's the table? — It's over there. — стол is masc., so он.
❌ Она́ моя́ сестра́, познако́мьтесь.
Wrong here — to introduce someone for the first time you present with э́то, not refer with она́.
✅ Э́то моя́ сестра́, познако́мьтесь.
This is my sister, get acquainted. — presenting → frozen э́то.
❌ — Где кни́га? — Оно́ на по́лке.
Wrong gender — кни́га is feminine, so the referring pronoun is она́, not оно́.
✅ — Где кни́га? — Она́ на по́лке.
Where's the book? — It's on the shelf. — feminine кни́га → она́.
❌ Э́та моя́ маши́на, я её то́лько что купи́л.
Wrong — to say 'this is my car' use frozen э́то; э́та is the agreeing demonstrative 'this' before a noun.
✅ Э́то моя́ маши́на, я её то́лько что купи́л.
This is my car, I just bought it. — presentational э́то (and её refers back, accusative of она́).
Key Takeaways
- Э́то = identify / present: "this is / that is / it is", frozen, never agrees. Used to name something new (Э́то кни́га, Э́то мой друг).
- Он / она́ / оно́ (и они́) = refer back: to a noun already mentioned, matching its grammatical gender — even for things (стол → он, кни́га → она́, окно́ → оно́).
- Test: telling someone what something is → э́то; saying something about a known noun → он/она́/оно́.
- The two pair up naturally: present with э́то, then refer back with the gendered pronoun (Э́то наш дом. Он ма́ленький).
- Don't confuse frozen presentational э́то with the agreeing demonstrative э́тот / э́та / э́то / э́ти ("this" + noun).
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- Это as a Universal PointerA1 — The presentational э́то ('this is / these are / that is / it is') is invariable — it never changes for gender, number or case: Э́то стол, Э́то ма́ма, Э́то кни́ги, Э́то мои́ друзья́. It answers Что э́то? / Кто э́то? and forms equational 'it is' sentences (Э́то интере́сно, Э́то пра́вда). Keep it apart from the agreeing demonstrative э́тот/э́та/э́то/э́ти ('this' + noun): the frozen Э́то моя́ кни́га ('This is my book') versus the agreeing э́та кни́га ('this book').
- Personal Pronouns and Their DeclensionA1 — The full system of Russian personal pronouns — я, ты, он, она́, оно́, мы, вы, они́ — declined across all six cases (я → меня́, мне, мной, обо мне; они́ → их, им, и́ми, них). Covers the obligatory н- that third-person pronouns add after a preposition (его́ кни́га but у него́), the fact that он/она́/оно́ refer to grammatically gendered things (Где стол? — Он там), and why Russian — unlike Spanish or Italian — usually keeps its subject pronouns rather than dropping them.
- Nominal Sentences and the DashA2 — Russian says 'X is Y' with no verb in the present tense — the copula is simply absent (Я студе́нт). When both halves are nouns, a dash stands in for the missing verb (Москва́ — столи́ца Росси́и). In the past and future the verb reappears as был/бу́дет, and — the feature that catches every English speaker — the predicate noun then goes into the INSTRUMENTAL case (Он был врачо́м), not the nominative.