Večeras ću pročitati poruku.

It is Future I in Serbian, meaning I will read.

In this sentence, Future I is formed with:

• ću = the 1st person singular future auxiliary
• pročitati = the infinitive to read / to read through

So ću pročitati means I will read.

Because Serbian often forms the future with:

• a future auxiliary: ću, ćeš, će, ćemo, ćete, će
• plus the infinitive of the main verb

So instead of conjugating pročitati by itself, Serbian uses ću pročitati.

The person is already shown by ću, which means I will.

Here ću is an auxiliary used to make the future tense. In this sentence it means will.

It comes from the verb hteti (to want), but in a sentence like this it usually does not mean want. It is just the normal future marker.

So:

• ja ću = I will
• ti ćeš = you will
• on/ona/ono će = he/she/it will

Because ću is a clitic, and clitics in Serbian usually stand in the second position of the sentence or clause.

Here the first element is Večeras (tonight), so ću comes right after it:

• Večeras ću pročitati poruku.

This word order is very natural in Serbian.

Yes. Serbian word order is fairly flexible, and changing it usually changes the emphasis, not the basic meaning.

For example:

• Večeras ću pročitati poruku. = emphasis on tonight
• Poruku ću pročitati večeras. = emphasis on the message
• Pročitaću poruku večeras. = a very natural alternative, with the future attached to the verb

The core meaning stays the same.

Yes. That is a very common and natural alternative.

Pročitaću is the fused future form:

• pročitati + ću → pročitaću

So these are both correct:

• Večeras ću pročitati poruku.
• Pročitaću poruku večeras.

They mean essentially the same thing, but the sentence focus is a little different.

This is a question of aspect, which is very important in Serbian.

• čitati = to read, imperfective
• pročitati = to read through / finish reading, perfective

In this sentence, pročitati suggests a completed action: the speaker plans to read the message and finish it.

So:

• Večeras ću čitati. = Tonight I’ll be reading.
• Večeras ću pročitati poruku. = Tonight I’ll read the message (and finish reading it).

Because poruku is in the accusative singular, which is the case used for a direct object.

The base form is:

• poruka = message (nominative)

But after a verb like pročitati (to read), the direct object goes into the accusative:

• pročitati poruku = to read a/the message

For many feminine nouns ending in -a, the accusative singular ends in -u:

• poruka → poruku
• knjiga → knjigu

It can mean either the message or a message, depending on context.

Serbian does not have articles like a and the, so the sentence itself does not explicitly mark that difference.

So poruku could mean:

• the message
• a message

You understand which one is meant from the situation.

Poruka is a broad word. It can mean:

• a text message
• a written message
• an email or note
• a message in a general sense

The exact meaning depends on context. In modern everyday speech, many people will often understand poruka as a text message unless the context suggests something else.

Because Serbian often leaves out subject pronouns when they are already clear from the verb form.

Here ću already shows 1st person singular, so ja is not necessary.

• Večeras ću pročitati poruku. = neutral and natural
• Ja ću večeras pročitati poruku. = possible, but ja adds emphasis, like I will read the message tonight

This is very common in Serbian.

Večeras means tonight or this evening.

It is an adverb, so it does not change form for case, gender, or number in this sentence.

It tells you when the action will happen:

• Večeras = tonight
• sutra = tomorrow
• danas = today

Ću is pronounced with the Serbian sound ć, which is softer than English ch.

A rough approximation for English speakers is something like tyoo or a very soft chyoo, but neither is exact.

Two useful points:

• č and ć are different sounds in Serbian
• ću is softer than a word beginning with ču

So it is worth listening to native audio and repeating it, because English does not have this exact sound.