Večeras ću njoj poslati poruku.

to send

Breakdown of Večeras ću njoj poslati poruku.

• poruka: message
• večeras: tonight
• hteti: will

Questions & Answers about Večeras ću njoj poslati poruku.

Why is ću placed right after večeras?

Because ću is a clitic. In Serbian, clitics usually go in the second position of the clause, after the first stressed word or phrase.

So here:

• Večeras = first element
• ću = goes right after it

That is why the sentence is:

Večeras ću njoj poslati poruku.

not normally:

Večeras poslati ću njoj poruku.

If the sentence started with ja, then you would get:

Ja ću njoj poslati poruku večeras.

How is the future tense formed in this sentence?

The future is formed with:

• ću = the 1st person singular future auxiliary
• poslati = the infinitive to send

So the structure is:

ću + infinitive

Here it means I will send.

A very literal breakdown is:

• Večeras = tonight
• ću = will
• njoj = to her
• poslati = send
• poruku = a message

Why is there no ja in the sentence?

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