Reflexive Verbs: se and si (Introduction) | Czech Grammar

A large slice of the Czech verb inventory comes with a little particle attached — se or si — and learning to handle these reflexive verbs is one of the defining tasks of the elementary stages. This page approaches them from the verb side: how the particle behaves as part of the verb, what the major types of reflexive verb are, and how se/si move through the conjugation. The companion page the reflexive pronouns se and si handles the form side — why one pronoun covers every person, how the accusative se and dative si differ as cases, and the long forms sebe/sobě. Here we treat se/si as markers that belong to verbs.

se and si are part of the verb's dictionary entry

The most important mental shift for an English speaker is this: in Czech, the reflexive particle is frequently listed in the dictionary together with the verb, the way the gender is listed with a noun. You do not look up bát; you look up bát se ("to be afraid"). You do not look up dívat; you look up dívat se ("to watch"). The se is not an optional add-on you decide to attach — it is part of the headword, part of the verb's identity.

Dictionary form	Meaning
bát se	to be afraid
smát se	to laugh
dívat se	to watch, look
ptát se	to ask
stát se	to happen, become
líbit se	to be pleasing / liked

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Memorise reflexive verbs with their particle, as a single unit — "bát se", "dívat se", "ptát se" — exactly as you memorise a noun with its gender. The particle is part of the word, not a decoration you can strip off.

The three jobs a reflexive verb can do

Reflexive verbs are not all the same animal. From the verb side, se/si is doing one of three jobs. Sorting any reflexive verb into one of these buckets tells you what is going on.

1. True reflexive — the action turns back on the subject

Here the verb is an ordinary transitive verb, and se simply marks that the subject is also the object: you wash, dress, or defend yourself. The se is the accusative direct object, and it really does mean "oneself."

Každé ráno se myju studenou vodou.

Every morning I wash (myself) with cold water.

Oblékl se a vyšel ven.

He got dressed and went outside.

2. Inherent (lexical) reflexive — se is just part of the verb

This is the big, surprising class. Here se carries no "self" meaning at all — there is nothing reflexive about being afraid or laughing. The se is simply welded to the verb as a lexical fact. These verbs do not exist without it: there is no bát, only bát se.

Bojím se, že nestihneme poslední vlak.

I'm afraid we won't catch the last train.

Na co se směješ?

What are you laughing at?

Dlouho jsme se neviděli — jak se máš?

We haven't seen each other in ages — how are you?

For more of these and how they pattern, see inherent reflexives.

3. The si type — doing something for/to oneself

The dative si adds a "for my own benefit" flavour: you do the action and you are also the one who gains from it. With si, there is usually still a separate direct object — you buy something for yourself, order something for yourself.

Dám si čaj, prosím.

I'll have a tea, please. (si: a tea, for myself)

Koupil jsem si nový kabát.

I bought myself a new coat.

The minimal pair that proves si is its own verb

The cleanest way to feel that si is part of the verb is to put the plain verb and its si-form side by side. They are genuinely two dictionary entries with different argument frames — the dative beneficiary shifts from someone else to yourself.

koupit (+ dat. someone)	koupit si
to buy for someone else	to buy for oneself
Koupil jsem mámě dárek.	Koupil jsem si dárek.

Koupil jsem mámě dárek k narozeninám.

I bought my mom a birthday present. (for someone else — no si)

Koupil jsem si k narozeninám nová sluchátka.

I bought myself new headphones for my birthday. (for myself — si)

The same verb, the same buying — the only difference is who benefits, and the verb signals that with the presence or absence of si. That is why dictionaries list koupit si separately, and why you should treat the si-version as its own item to learn.

se/si travel through the whole conjugation

This is the heart of the verb-side view. Because se/si belong to the verb, they appear in every form the verb takes — infinitive, present, past, future, imperative, conditional. The particle never disappears; it only changes position in the sentence. Watch bát se keep its se across the paradigm:

Form	Example	Meaning
infinitive	bát se	to be afraid
present	bojím se	I'm afraid
past	bál jsem se	I was afraid
future	budu se bát	I'll be afraid
imperative	neboj se	don't be afraid

The crucial fact — and the one that surprises learners most — is that se/si are clitics and do not have to stand next to their verb. They snap into second position in the clause, right after the first stressed word, even if the participle or infinitive is far away. So with a past auxiliary, the se slips in behind jsem, leaving the participle stranded at the end.

Včera jsem se vrátil z Brna pozdě večer.

Yesterday I came back from Brno late in the evening. (se rides in second position, behind jsem — far from vrátil)

Petr se chce naučit česky.

Petr wants to learn Czech. (se attaches to the cluster after Petr, not to the infinitive naučit)

The full placement rules — including the order when se/si meets the past auxiliary and object pronouns — are on the se/si clitic placement page. The one habit to build now: the particle belongs to the verb in meaning, but in word order it floats to second position.

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Resist translating se as a literal "self." Most of the time it carries no self-meaning — it's a verb marker. And never reinforce it with the long form: write Myju se, never Myju sebe. The long sebe/sobě is only for emphasis or after prepositions (see the pronoun page).

Why this matters: reflexivity is a verb category

Reflexive verbs are not a footnote — they are a structural category of the Czech verb, alongside transitive and intransitive. Whole swathes of everyday vocabulary live here: greetings (máš se?), feelings (bojím se, těším se), routines (holím se, oblékám se), and ordering food (dám si). Treating se/si as an integral part of each verb — learned with the verb, conjugated with the verb, but floating to second position in the clause — is the key that unlocks a very large part of natural Czech.

Common Mistakes

❌ Bojím tmy.

Incorrect — bát se is an inherent reflexive; the se is part of the verb and cannot be dropped.

✅ Bojím se tmy.

I'm afraid of the dark.

❌ Myju sebe každé ráno.

Incorrect — a plain reflexive uses the clitic se, not the emphatic long form sebe.

✅ Myju se každé ráno.

I wash (myself) every morning.

❌ Včera vrátil jsem se pozdě.

Incorrect word order — the clitics jsem and se belong in second position, right after Včera.

✅ Včera jsem se vrátil pozdě.

Yesterday I came back late.

❌ Koupil jsem si mámě dárek.

Incorrect — si means 'for myself,' which clashes with 'for mom'; drop the si when buying for someone else.

✅ Koupil jsem mámě dárek.

I bought my mom a present.

Key Takeaways

Many Czech verbs carry se or si as part of their dictionary form — learn them as a unit (bát se, dívat se, dát si), like a noun with its gender.
Three types: true reflexive (myju se = act on oneself), inherent reflexive (bát se, smát se — se has no "self" meaning), and the si type (koupit si, dát si — for one's own benefit).
si can make a separate verb: koupit (buy for someone) vs koupit si (buy for oneself).
se/si appear in every conjugated form, but as clitics they float to second position and need not sit beside the verb (Včera jsem se vrátil).
Don't translate se as "self," and don't replace the clitic with the emphatic sebe/sobě.

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