Stanar će mesečno platiti kiriju.

Stanar is a masculine singular noun meaning tenant. In this sentence, it is in the nominative case because it is the subject of the verb — the person who will do the action.

Its basic dictionary form is also stanar.

This is the future I tense in Serbian.

It is formed with:

• a form of hteti (ću, ćeš, će, ćemo, ćete, će)
• plus the infinitive of the main verb

So here:

• će = will / third person singular future auxiliary
• platiti = infinitive, to pay

Together, će platiti = will pay.

Both patterns exist in Serbian, but they are used a little differently in structure.

You can say:

• Stanar će platiti kiriju.
• Stanar platiće kiriju. — this sounds unusual in modern standard usage
• Platiće kiriju. — very common when the auxiliary is attached to the verb

In normal modern Serbian, when the subject or some other word comes first, the most natural pattern is:

• subject + će + infinitive

So Stanar će platiti kiriju is the standard and natural form.

Mesečno is functioning as an adverb here. It means monthly, per month, or on a monthly basis.

It tells us how often or according to what time period the payment happens.

So:

• platiti kiriju mesečno = to pay rent monthly

Even though forms like this can look adjective-like to English speakers, here mesečno is not describing a noun directly. It is modifying the verb phrase.

Yes. Both are possible, but they are not exactly identical in feel.

• mesečno = monthly / per month
• svakog meseca = every month

So these are both natural:

• Stanar će mesečno platiti kiriju.
• Stanar će platiti kiriju svakog meseca.

The first sounds a bit more like a rate or schedule.
The second emphasizes repetition in time a little more directly.

Because kiriju is the accusative singular form of kirija.

The noun kirija means rent. In this sentence, rent is the direct object — the thing being paid — so Serbian uses the accusative case.

Forms:

• nominative: kirija
• accusative: kiriju

So:

• Kirija je visoka. = The rent is high.
• Platiti kiriju. = To pay the rent.

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

• platiti = perfective → to pay, viewed as a completed act
• plaćati = imperfective → to be paying / to pay regularly / to pay in general

In this sentence, platiti presents the payment as a complete act. Even with mesečno, Serbian can still use the perfective verb if the idea is that each monthly payment is a completed payment.

Compare:

• Stanar će platiti kiriju. = The tenant will pay the rent.
• Stanar će plaćati kiriju. = The tenant will be paying rent / will pay rent regularly.

The imperfective version would emphasize the ongoing or habitual nature more strongly.

Most likely it suggests repeated monthly payments, because of mesečno.

However, the use of platiti still makes each payment feel like a completed payment. So the sentence can be understood as something like:

• The tenant will pay the rent monthly
• meaning the tenant will make the rent payment each month

If you want to stress the regular ongoing arrangement even more, plaćati could also be used:

• Stanar će mesečno plaćati kiriju.

The sentence has a very natural Serbian word order:

• Stanar = subject
• će = future auxiliary
• mesečno = adverb
• platiti = infinitive
• kiriju = object

So literally:

• Tenant will monthly pay rent

Serbian word order is more flexible than English word order, but not random. This version sounds neutral and natural.

You could also hear:

• Stanar će platiti kiriju mesečno.
• Kiriju će stanar plaćati mesečno.

These variations shift the emphasis slightly.

Because će is a clitic, and clitics in Serbian usually take the second position in the clause.

That does not always mean the second word in a simple mechanical sense, but in this sentence it appears exactly there:

• Stanar | će | mesečno platiti kiriju

This is very typical Serbian clitic placement.

Compare:

• On će doći.
• Moj brat će doći.
• Taj stanar će platiti kiriju.

In each case, će comes very early, usually after the first phrase.

Yes, if the subject is already clear from context.

Serbian often omits subject pronouns and sometimes other obvious subjects too, but with a noun like stanar, you usually keep it if you want to identify who is paying.

Without the noun, you could say:

• Plaćaće kiriju mesečno.
• Platiće kiriju mesečno.

That would mean He/She will pay the rent monthly, depending on context.

No. Kirija is very common in everyday speech, especially for rent paid for an apartment or place to live.

You may also see:

• zakupnina — a more formal word for rent / lease payment

In daily conversation, kirija is often the most natural choice.

The original sentence is understandable and grammatical, but many speakers might more naturally say one of these depending on what they want to stress:

• Stanar će plaćati kiriju mesečno.
• Stanar će svakog meseca plaćati kiriju.
• Stanar će mesečno da plaća kiriju.
  (common in speech)

Why? Because when talking about a repeated monthly obligation, Serbian often prefers the imperfective verb plaćati.

Still, Stanar će mesečno platiti kiriju is a useful sentence for learning:

• future tense
• adverb placement
• accusative case
• aspect contrast