Demonstratives: этот, эта, это, эти

Demonstratives: э́тот, э́та, э́то, э́ти

Pointing at an object (this/these) and telling э́то “this is” from э́та/э́тот

Key points

э́тот / э́та / э́то / э́тиthis / these — agrees with the noun
э́то presentativeэ́то = “this is…” (invariable)
э́тот домmasculine; э́та кни́га feminine; э́то окно́ neuter
тот / та / то / теthat one (further away)
The trapЭ́то кни́га (this is a book) ≠ Э́та кни́га но́вая (this book is new)

Pointing: э́тот, э́та, э́то, э́ти

The demonstrative э́тот (this) agrees in gender and number with the noun it accompanies, exactly like an adjective.

Agreement of the demonstrative

Masculine
э́тот
э́тот дом (this house), э́тот стол
Feminine
э́та
э́та кни́га (this book), э́та маши́на
Neuter
э́то
э́то окно́ (this window), э́то мо́ре
Plural (all genders)
э́ти
э́ти кни́ги (these books), э́ти лю́ди

💡⚠️ э́то (“this is”) ≠ э́та / э́тот (“this”)

This is THE beginner trap. э́то on its own = “this is… / here is…”, invariable, used to present. э́тот/э́та/э́то + noun = “this…”, agreeing. Compare: Э́то кни́га (this is a book) and Э́та кни́га но́вая (this book is new).
Э́то мой брат. (this is my brother — presentative)
Э́тот брат — ста́рший. (this brother is the elder — agreeing)
Э́то окно́. / Э́то окно́ откры́то. (this is a window / this window is open)

Further away: тот, та, то, те

To point at something further away (that one, over there), use тот, which agrees the same way. In everyday speech, э́тот remains the most frequent.

э́тот (here) vs тот (there)

1

э́тот — near

Э́тот стол свобо́ден. (this table is free)

Мне нра́вится э́та пе́сня. (I like this song)

2

тот — far / opposite

Не э́тот дом, а тот. (not this house, but that one)

В тот день шёл дождь. (that day it was raining)

Dialogue: in a shop

Продаве́цЭ́то но́вая моде́ль. Вам нра́вится э́тот телефо́н ?
Клие́нтДа, но э́та су́мка дороже. А те очки́ — ско́лько стоят ?
Продаве́цЭ́ти очки́ стоят две ты́сячи рубле́й.
Клие́нтХорошо́, я возьму́ э́тот телефо́н и э́ту су́мку.

Salesperson: This is a new model. Do you like this phone? — Customer: Yes, but this bag is more expensive. And those glasses over there, how much are they? — Salesperson: These glasses cost two thousand roubles. — Customer: Good, I’ll take this phone and this bag.