The Reflexive Possessive svůj | Czech Grammar

Czech has a possessive word that English simply does not: svůj, meaning "one's own". It is the word you reach for whenever the thing possessed belongs to the subject of the clause — no matter whether that subject is I, you, he, she, we, or they. Where English says "I have my key, you have your key, she has her key," Czech uses one and the same word for the possessor-equals-subject case: svůj. Getting comfortable with svůj is one of the clearest dividing lines between sounding foreign and sounding native, and in the third person it can flip a sentence's meaning entirely.

Mám svůj klíč, nemusíš mi půjčovat svůj.

I have my (own) key, you don't have to lend me yours.

The one rule that drives everything

The rule is short: if the possessor is the subject of the clause, use svůj. Ask yourself a single question — does this thing belong to whoever is doing the verb? If yes, svůj. The person of the subject is irrelevant; svůj covers all of them.

Vidím svého bratra.

I see my brother. (the brother is mine — I am the subject)

Vidíš svého bratra.

You see your brother. (the brother is yours — you are the subject)

Vidí svého bratra.

He sees his (own) brother. (the brother is his — he is the subject)

Notice that the Czech word svého never changed across all three sentences, even though English went my → your → his. That is the whole trick: svůj reads its meaning off whoever the subject happens to be. English has no equivalent at all — the closest it gets is the archaic "one's own", but English cannot say "You see one's own brother" to mean "your brother". Czech does exactly that, systematically.

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Forget the person. svůj does not mean "my" or "his" — it means "belonging to the subject of this clause". The same word serves every person and both numbers. Identify the subject, check whether the object belongs to it, and svůj writes itself.

The minimal pair that changes meaning: svůj vs. jeho/její

In the first and second person, using svůj is mostly a matter of sounding natural — there is rarely another "my" to confuse it with. In the third person, the choice between svůj and jeho / její is not stylistic at all. It decides whose the thing is.

Petr miluje svou ženu.

Petr loves his (own) wife. (svou = the subject Petr's wife)

Petr miluje jeho ženu.

Petr loves his wife — someone else's wife. (jeho = another man's wife)

Both sentences are perfectly grammatical Czech, and a Czech reader hears the difference instantly. svou points the possession back at the subject, Petr. jeho points it at some other male mentioned or implied in the context. Swap the words and you have changed who Petr is in love with — and possibly started a scandal.

The same split runs through the feminine její:

Marie hledá svoji kočku.

Marie is looking for her own cat.

Marie hledá její kočku.

Marie is looking for her cat — another woman's cat.

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The third-person test is worth memorising as a pair: svůj = the subject's own; jeho / její / jejich = somebody else's. If the owner is the person doing the verb, you almost always want svůj.

svůj only works when the owner is the subject

Here is the honest limit of the rule, and the place learners overreach. svůj can only point back to the subject. If the thing belongs to someone who is not the subject — an object, an indirect object, anyone else in the sentence — you cannot use svůj. You must use jeho, její, or jejich.

Řekl jsem Petrovi o jeho problému.

I told Petr about his problem. (the problem is Petr's, but Petr is not the subject — so jeho, never svém)

Here I am the subject, not Petr. The problem belongs to Petr, who is only the indirect object. Because the owner is not the subject, svůj is impossible and jeho is obligatory. Contrast it with a case where the owner really is the subject:

Řekl jsem Petrovi o svém problému.

I told Petr about my (own) problem. (the problem is mine — I am the subject — so svém)

This contrast — jeho problému (Petr's) vs. svém problému (mine) — is the entire system in one breath.

svůj declines exactly like můj

Good news after all that: there is nothing new to memorise for the forms. svůj declines precisely like the possessive můj ("my"). If you know one, you know the other — just swap the m- for sv-.

Case	Masc. animate	Masc. inanimate	Feminine	Neuter
Nominative	svůj	svůj	svá / svoje	své / svoje
Genitive	svého	svého	své / svojí	svého
Dative	svému	svému	své / svojí	svému
Accusative	svého	svůj	svou / svoji	své / svoje
Locative	svém	svém	své / svojí	svém
Instrumental	svým	svým	svou / svojí	svým

As with adjective and possessive agreement, svůj agrees in gender, number, and case with the thing possessed, not with the owner. In Vidím svého bratra, the ending -ého comes from bratr being masculine animate accusative — it has nothing to do with the fact that the owner ("I") is first person. The longer svoje and svojí forms are the everyday spoken variants of the shorter svá and své; both are correct.

Vezmi si svůj kabát, venku je zima.

Take your coat, it's cold outside. (svůj — masc. inanimate accusative, like můj)

Zapomněla jsem si doma svoje doklady.

I left my documents at home. (svoje — masc. inanimate plural)

Staráme se o své rodiče.

We take care of our parents. (své — the parents belong to us, the subject)

svůj across every person — a quick sweep

To cement the point that one word serves all persons, here is svůj marching through the subjects with the same object, svůj názor ("one's own opinion"):

Každý má právo na svůj názor.

Everyone has the right to their own opinion. (subject 'každý')

Trváme na svém názoru.

We stand by our opinion. (subject 'we', locative svém)

Proč si pořád neuklidíš svůj pokoj?

Why won't you ever tidy your room? (subject 'you')

Common Mistakes

❌ Mám rád můj dům.

Incorrect — the house belongs to the subject (I), so it must be svůj, not můj.

✅ Mám rád svůj dům.

I like my (own) house.

❌ Petr miluje jeho ženu.

Wrong if you mean his OWN wife — jeho makes it another man's wife. Use svou for Petr's own wife.

✅ Petr miluje svou ženu.

Petr loves his own wife.

❌ Vidím svůj bratra.

Incorrect — svůj must decline to the masculine-animate accusative: svého.

✅ Vidím svého bratra.

I see my brother.

❌ Řekl jsem Petrovi o svém problému, který se týkal jen jeho.

Confusing if you mean PETR's problem — since Petr isn't the subject, his problem is 'jeho problém', not 'svůj'.

✅ Řekl jsem Petrovi o jeho problému.

I told Petr about his (Petr's) problem.

❌ Vzala si svoju tašku.

Incorrect spelling/form — the feminine accusative is svou (or colloquial svoji), not 'svoju'.

✅ Vzala si svou tašku.

She took her (own) bag.

Key Takeaways

Use svůj whenever the thing possessed belongs to the subject of the clause — for every person: Mám svůj klíč, Máš svůj klíč, Má svůj klíč.
English has no equivalent; it spreads the meaning across my, your, his, her, our, their. Czech collapses all of them into svůj when the owner is the subject.
In the third person the choice is meaningful: svůj = the subject's own, jeho / její / jejich = someone else's. Miluje svou ženu ≠ Miluje jeho ženu.
svůj can only refer to the subject; if the owner is anyone else in the sentence, you must use jeho / její / jejich.
svůj declines exactly like můj and agrees with the thing possessed, not the owner.

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