Zítra se vrátím z práce pozdě.

Here se is part of the verb vrátit se, which means to return / to come back.

So:

• vrátit = to turn something back, to return something
• vrátit se = to return, to come back

In this sentence, se does not mean myself in the English sense. It is just part of the verb you need in order to say come back / return.

So:

• Vrátím knihu. = I will return the book.
• Vrátím se. = I will come back.

This is because vrátit se is a perfective verb.

In Czech, perfective verbs often use present-tense forms to express future meaning. So although vrátím looks like a present-tense form morphologically, its meaning here is future:

• vrátím se = I will come back

This is very common in Czech:

• napíšu = I will write
• udělám = I will do
• vrátím se = I will return

If you wanted an ongoing, repeated, or habitual sense, Czech would use an imperfective verb instead.

Because Czech usually leaves out subject pronouns when they are clear from the verb ending.

The ending -ím in vrátím already tells you the subject is I.

So:

• (Já) se vrátím = I will come back
• (Ty) se vrátíš = you will come back
• (On/ona) se vrátí = he/she will come back

You can say Já se vrátím, but já is usually added only for emphasis, contrast, or clarity.

Normally, no. Se is a clitic, and Czech clitics usually go in the second position in the sentence or clause.

So in:

• Zítra se vrátím z práce pozdě.

Zítra is the first element, and se comes right after it.

This is much more natural than:

• Zítra vrátím se z práce pozdě. ❌

Compare:

• Zítra se vrátím.
• Domů se vrátím večer.
• Já se vrátím zítra.

The exact word order can change, but se tends to stay in that early clitic position.

After z / ze meaning from / out of, Czech uses the genitive.

So z práce means from work, and práce is in the genitive singular.

A useful thing to notice is that for práce, the nominative and genitive singular look the same:

• nominative: práce
• genitive: práce

So the case changes grammatically, even though the form does not change here.

More examples with z + genitive:

• z domu = from the house/home
• z Prahy = from Prague
• z kanceláře = from the office

Because the preposition z requires the genitive, not the accusative or locative.

For the noun práce:

• práce = nominative singular
• práce = genitive singular
• práci = dative/locative singular

So after z, the correct form is:

• z práce = from work

not:

• z práci ❌

Pozdě is an adverb meaning late.

It describes how/when the speaker returns:

• vrátím se pozdě = I’ll come back late

Compare:

• pozdní = late (adjective)
• pozdě = late (adverb)

Examples:

• pozdní vlak = a late train
• Přijdu pozdě. = I’ll come late / I’ll be late

So here pozdě modifies the verb phrase, not a noun.

Yes. In natural English, this Czech sentence can be translated in several similar ways, for example:

• Tomorrow I’ll return from work late.
• Tomorrow I’ll come back from work late.
• Tomorrow I’ll get back from work late.
• Tomorrow I’ll be coming back from work late.

The core idea is the same: the speaker will come back from work at a late time tomorrow.

Yes. Czech word order is fairly flexible, and moving words changes emphasis more than basic meaning.

Zítra is at the beginning because it sets the time frame right away: tomorrow.

Other possible orders include:

• Zítra se vrátím z práce pozdě.
• Z práce se zítra vrátím pozdě.
• Pozdě se zítra vrátím z práce. (possible, but marked/stylistically unusual in many contexts)

The most neutral version is the original one. For learners, it is a very good standard pattern: time + clitic + verb + other information.

The dictionary form is vrátit se.

So:

• vrátit se = to return, to come back
• vrátím se = I will return / come back

When learning Czech verbs, it is important to learn reflexive verbs with se or si as part of the whole item, because the meaning can change a lot.

For example:

• vrátit = to return something
• vrátit se = to return oneself / to come back

Not exactly, but they are closely related.

• z práce = from work
• z práce domů = home from work

Your sentence does not explicitly say home, only from work. But in many contexts, listeners may naturally understand that the speaker means going back home from work.

So:

• Zítra se vrátím z práce pozdě. = Tomorrow I’ll come back from work late.
• Zítra se vrátím z práce domů pozdě. = Tomorrow I’ll come home from work late.

The second one is more explicit.

Yes, but the meaning changes a bit.

• Zítra se vrátím z práce pozdě.
  = Tomorrow I’ll come back from work late.
  This sounds like a single completed event.

• Zítra se budu vracet z práce pozdě.
  = Tomorrow I’ll be coming back from work late.
  This sounds more ongoing or process-focused.

The original sentence uses the perfective verb and is the most natural choice if you simply mean I’ll get back late tomorrow.

A few quick tips:

• zítra: roughly ZEE-tra
• vrátím: roughly VRAA-teem

Things to notice:

• í and á are long vowels
• ř does not appear in this sentence, so that’s one less problem here
• the v-r cluster in vrátím may feel unusual to English speakers, but Czech allows that kind of consonant grouping

A practical way to practice is to split it:

• vrá-tím
• zí-tra
• po-zdě

Then say the full sentence slowly: Zítra se vrátím z práce pozdě.