“My”, “your”, “his”, “our”: Russian has a word for each, plus one English lacks, свой, meaning “one’s own”. Some of these words change with every noun; three never change at all. This guide shows which is which, and exactly when свой is needed.
A1 to B2·13 min read·Audio for every example
Он чита́ет свою́ кни́гу (on chi-TA-yet sva-YU KNEE-gu), “He’s reading his (own) book”. свой always points back to the subject of its own clause.
The short answer
A possessive says whose something is. мой (my), твой (your), наш (our) and ваш (your, plural or polite) work like adjectives (describing words): they change for the gender, number and case (the ending showing a word’s job) of the noun. его́ (his), её (her) and их (their) never change. When the owner is the subject of the same clause, Russian uses свой: Она́ лю́бит свою́ рабо́ту, “she loves her (own) job”.
The possessive words
Every Russian noun has a gender (masculine, feminine or neuter), usually visible from its last letter. The possessive takes the gender of the thing owned, never of the owner: a woman says мой брат (my brother) and a man says моя́ сестра́ (my sister). The possessive is red throughout this page; tap any form to hear it.
Owner
Masc. · брат
Fem. · сестра́
Neut. · окно́
Plural · де́ти
myя → мой
your (one friend)ты → твой
his, itsон, оно́ → его́
herона́ → её
ourмы → наш
your (plural, polite)вы → ваш
theirони́ → их
one’s ownthe subject → свой
whose?кто → чей
The shaded rows (его́, её, их) are the same in every column. ваш is “your” for several people, or for one person you call вы (polite). See ты and вы.
его́, её, их never change
“His”, “her” and “their” are really the genitive of “he”, “she” and “they”: literally “of him”, “of her”, “of them”. Because they already have a case of their own, they ignore the noun completely, in every gender and every case.
The same holds for её (yi-YO, her) and их (eekh, their): её брат, её сестра́, их де́ти.
мой, твой, свой, наш, ваш in every case
твой and свой follow мой letter for letter; ваш follows наш. So two tables cover all five words. In the accusative, the masculine and plural forms depend on whether the noun is a thing or a person or animal (the animate rule).
мойand твой, свой
Case
Masc.
Fem.
Neut.
Plural
Nom.
Gen.
Dat.
Acc.
Instr.
Prep.
нашand ваш
Case
Masc.
Fem.
Neut.
Plural
Nom.
Gen.
Dat.
Acc.
Instr.
Prep.
Pronunciation: as in all adjective endings, г in -его is said as v: моего́ is “ma-ye-VO”, на́шего is “NA-she-va”.
свой: “one’s own”
English “his” is ambiguous: in “Ivan took his book”, the book could be Ivan’s or another man’s. Russian keeps the two apart. свой means the book belongs to the subject of the same clause (the person doing the action); его́ then means it belongs to someone else.
свой declines exactly like мой: свой, свою́, своего́, свои́м…
Who owns it?
Use
Example
The subject is he, she, it, they or a noun
свой (required)
The subject is я, ты, мы or вы
свой or мой
The possessive is part of the subject
мой, его́… (not свой)
Leaving “my” out
English needs a possessive with family, body parts and personal things; Russian leaves it out whenever the owner is obvious. Adding мой in these sentences isn’t ungrammatical, but it sounds emphatic: “my mum, not yours”.
чей? Asking “whose?”
чей (chey) agrees with the thing owned, just like мой. In the answer, the owner can be a possessive (мой) or a noun in the genitive (бра́та, “my brother’s”).
ма́мин, па́пин: “Mum’s”, “Dad’s”
In everyday speech, family words and first names ending in -а or -я can become a possessive adjective with -ин: ма́ма → ма́мин, “Mum’s”. It agrees with the thing owned (-ин, -ина, -ино, -ины). It sounds warm and informal; in writing, use the genitive instead: маши́на ма́мы.
Set phrases with свой
свой also carries the sense of “belonging”, “familiar” or “proper”, and appears in many fixed expressions. These are C1-level and give speech a native feel.
Check yourself
Replace the English word in brackets with the right Russian form. Say the answer out loud, then reveal it.
1Э́то (my) кни́га.This is my book.
2Где (your, to a friend) брат?Where is your brother?
3Мы живём в (our) до́ме.We live in our house.
4Он позвони́л (his own) отцу́.He called his father.
5Я разгова́ривал с (her) бра́том.I was talking to her brother.
6Они́ продаю́т (their own) маши́ну.They’re selling their car.