Reflexive pronouns are tiny words that can change the entire meaning of a sentence.

In Czech, the two most important reflexive pronouns are se and si.

Understanding how to use them correctly is a core part of learning Czech grammar.

I’ll show you exactly how they work and when to use them in everyday conversations.

What are reflexive pronouns in Czech?

A reflexive pronoun shows that the subject of the sentence is performing an action on itself.

In English, you use words like “myself”, “yourself”, or “themselves” to express this.

In Czech, you only need to learn two simple words for this concept.

These words are se and si.

Unlike in English, these two Czech pronouns don’t change depending on who is speaking.

You’ll use the exact same word for “myself” as you would for “himself” or “ourselves”.

How to use se (accusative)

The pronoun se represents the direct object of an action.

In Czech grammar, this aligns with the accusative case.

You use se when the action directly affects the person doing it.

If you’re physically washing your own body, you use se.

If you remove the word se, the sentence requires a different direct object.

For example, myji auto means “I’m washing the car” instead of washing yourself.

How to use si (dative)

The pronoun si represents the indirect object of an action.

This aligns with the dative case in Czech grammar.

You use si when an action is done for oneself or to oneself.

It implies that you’re the beneficiary of the action.

Notice how the action produces something that the subject gets to keep or enjoy.

Reciprocal meanings of se and si

Sometimes, se and si don’t mean “oneself”.

They can also mean “each other” when used with plural subjects.

This is called a reciprocal pronoun.

You use se when two or more people are directly doing something to each other.

You use si when two or more people are doing something for or to each other.

Verbs that always need a reflexive pronoun

Many Czech verbs simply can’t exist without se or si.

These are called inherent reflexive verbs.

The pronouns don’t translate directly to English in these cases.

You just have to memorize them as a permanent part of the verb.

Here are some common inherent verbs that always use se.

Here are some common inherent verbs that always use si.

Where to place se and si in a sentence

Word order is very important when using these pronouns.

Se and si are known as clitics.

This means they don’t carry any vocal stress on their own.

Because they’re clitics, they must always go in the second position of a sentence or clause.

The “second position” means they come immediately after the first main block of information.

In the sentence above, the word večer (in the evening) takes the first position.

The pronoun se must immediately follow it in the second position.

Here, the verb kupuji (I’m buying) is the first piece of information, so si comes right after it.

If a sentence has both a reflexive pronoun and another clitic, se and si usually come first in the clitic cluster.

Following this simple placement rule will instantly make your spoken Czech sound much more natural.