Kurir mora da požuri.

Because kurir is the subject, and kurir is third-person singular: the courier / a courier.

The verb morati changes to match the subject:

• ja moram = I must
• ti moraš = you must
• on/ona/ono mora = he/she/it must

So:

• Kurir mora da požuri.
• literally: The courier must...

Kurir is in the nominative singular because it is the subject of the sentence.

In Serbian, the subject of a sentence is normally in the nominative case. Here, kurir is the one performing the action of having to hurry, so nominative is the expected form.

Also, Serbian has no articles, so kurir can mean the courier or a courier, depending on context.

Here da introduces the verb that follows mora.

In modern Serbian, after many verbs such as morati, hteti, moći, trebati, Serbian often uses:

• da + present tense

So:

• mora da požuri

instead of an English-style infinitive like must to hurry.

A very literal breakdown would be something like:

• kurir = the courier
• mora = must
• da požuri = to hurry / hurry

But in natural English, you simply translate the whole thing as The courier must hurry.

Because in modern standard Serbian, the structure da + present tense is very common, and often preferred, after modal-like verbs.

So Serbian commonly says:

• mora da požuri

rather than:

• mora požuriti

The infinitive požuriti is not wrong in every variety or style, but da + present is the most typical pattern many learners will meet.

No. In this sentence, požuri is not an imperative. It is a present-tense form used after da.

This is confusing because the form požuri can look exactly like the imperative singular:

• Požuri! = Hurry up!

But in:

• Kurir mora da požuri.

it is part of the da-clause, so it means that he hurry / to hurry, not a command directed at someone.

The subject kurir also makes that clear: the sentence is talking about the courier, not speaking to him.

It comes from the verb požuriti.

This verb is perfective, which means it presents the action as a whole, often with the sense of hurry up, make haste, or do it quickly as a completed or bounded action.

A related imperfective verb is žuriti.

Very roughly:

• žuriti = to be hurrying / to hurry in an ongoing sense
• požuriti = to hurry up, to make a quick move, to do the action promptly

So mora da požuri suggests that the courier needs to get moving quickly / hurry up.

Because the speaker is viewing the action as a single needed action: the courier needs to hurry up.

Compare the nuance:

• mora da požuri = he must hurry up
• mora da žuri = he must be hurrying / he has to rush

The perfective požuriti often sounds more like he needs to act quickly now, while žuriti focuses more on the process or ongoing activity of hurrying.

In many everyday situations, požuri is the natural choice for must hurry.

Yes, Serbian word order is more flexible than English, but the neutral order here is:

• Kurir mora da požuri.

This is the most straightforward way to say it.

Other orders are possible, but they usually add emphasis or sound more marked, for example:

• Mora kurir da požuri.
• Mora da požuri kurir.

These are not the default choice in ordinary neutral speech. For a learner, subject + mora + da + verb is the safest pattern.

In Cyrillic, it is:

• Курир мора да пожури.

Letter by letter:

• Kurir → Курир
• mora → мора
• da → да
• požuri → пожури

Serbian normally uses both Latin and Cyrillic, and both are standard.