Večeras ću ispisati obrazac i sutra ga odnijeti osobno u općinu.

Ću is the 1st person singular future auxiliary, so it means I will.

The sentence has two infinitives:

• ispisati = to fill out / write out
• odnijeti = to take / bring somewhere

So the structure is basically:

• Večeras ću ispisati obrazac = Tonight I will fill out the form
• i sutra ga odnijeti osobno u općinu = and tomorrow take it personally to the municipal office

Croatian often uses one future auxiliary for both verbs when they are closely linked. So ću applies to both actions.

You can repeat it if you want:

• Večeras ću ispisati obrazac i sutra ću ga osobno odnijeti u općinu.

That is also correct, just a bit more explicit.

Because ću is a clitic. In Croatian, clitics usually go in second position in the clause.

So:

• Večeras = first element
• ću = second-position clitic

That makes Večeras ću ispisati... the natural order.

The same thing happens later with ga:

• sutra ga odnijeti

Here sutra is the first element, and ga goes right after it.

This second-position rule is very important in Croatian word order.

Ga means him or it, depending on context. Here it means it, and it refers to obrazac = the form.

So:

• obrazac = the form
• ga = it

The speaker first mentions the form explicitly, and then refers back to it with the pronoun.

This is very natural in Croatian, just like in English:

• I’ll fill out the form and take it tomorrow.

Again, this is because ga is a clitic, and clitics normally go near the beginning of the clause, in second position.

So after sutra, the clitic ga comes immediately:

• sutra ga odnijeti

Putting ga at the very end would sound unnatural in standard Croatian.

So this sentence shows two clitic patterns:

• Večeras ću...
• sutra ga...

Both follow the same basic rule.

Because ispisati and odnijeti are perfective verbs. Croatian often uses perfective verbs for single, completed actions in the future.

Here the speaker means:

• tonight, the form will be completed
• tomorrow, it will be taken to the office

That is why perfective verbs fit well.

Compare:

• pisati = to write, be writing, write in general
• ispisati = to write out / complete fully
• nositi = to carry, wear, carry around habitually
• odnijeti = to take somewhere as one completed action

So the sentence is focused on finished results, not ongoing activity.

Obrazac is the direct object of ispisati, so it is in the accusative singular.

But obrazac is a masculine inanimate noun, and many masculine inanimate nouns have the same form in nominative and accusative singular.

So:

• nominative: obrazac
• accusative: obrazac

That is why it does not visibly change here.

Because u can take different cases depending on meaning:

• u + accusative = movement into / to
• u + locative = being in

Here the speaker is talking about movement:

• odnijeti ... u općinu = take it to the municipal office / into the municipality office

So the accusative is used.

Compare:

• Radim u općini. = I work in the municipal office.
  Here it is location, so locative.

Osobno means personally or in person.

In this sentence it tells us how the speaker will deliver the form:

• not by mail
• not online
• not through someone else

but in person.

So:

• ga odnijeti osobno u općinu = take it personally / in person to the municipal office

Usually not here.

Croatian distinguishes direction:

• donijeti = to bring to here / toward the destination as a reference point
• odnijeti = to take away / from here to somewhere else

In this sentence, the speaker is taking the form from where they are to the municipal office, so odnijeti is the natural choice.

In simple terms:

• donijeti = bring
• odnijeti = take away / take over there

Yes, Croatian word order is fairly flexible, but the clitics still need to be placed correctly.

For example, these are all natural:

• Večeras ću ispisati obrazac i sutra ga osobno odnijeti u općinu.
• Večeras ću ispisati obrazac, a sutra ću ga osobno odnijeti u općinu.
• Obrazac ću večeras ispisati i sutra ga osobno odnijeti u općinu.

The differences are mostly about emphasis.

But you still need to respect clitic placement, so forms like Ću večeras... or sutra odnijeti ga... are not the normal standard order.

In standard Croatian, no.

If the infinitive comes directly before the future auxiliary, the infinitive usually loses its final -i in writing:

• Ispisat ću obrazac.

not

• ispisati ću obrazac

But in your original sentence, the infinitive does not stand directly before ću. The first word is Večeras, so the sentence correctly has:

• Večeras ću ispisati obrazac.

So both patterns are correct in the right context:

• Večeras ću ispisati obrazac.
• Ispisat ću obrazac večeras.