Ona živi u kući.

Because after u meaning in, Serbian normally uses the locative case for location.

• base form: kuća = house
• locative singular: kući = in the house / in a house

So:

• u kući = in the house
• u kuću = into the house

That second one uses the accusative and shows movement toward the inside, not location.

It is the locative singular of kuća.

In this sentence:

• Ona = she
• živi = lives
• u kući = in a house / in the house

The locative is commonly used after prepositions that describe location, and u is one of the most important ones.

Serbian does not have articles like English a/an and the.

So kuća can mean:

• a house
• the house
• sometimes even home, depending on context

The exact meaning usually comes from the situation, not from a separate article word.

So Ona živi u kući could be understood as:

• She lives in a house
• She lives in the house

depending on context.

Primarily, kuća means house as a building. But in some contexts, English may naturally translate it as home.

Still, Serbian often uses other words too, depending on meaning:

• kuća = house
• dom = home, household, institution, residence

In Ona živi u kući, the most direct sense is She lives in a house / house-building.

Živi is the 3rd person singular present tense form of the verb živeti (to live).

So:

• ja živim = I live
• ti živiš = you live
• on/ona/ono živi = he/she/it lives

Here it matches ona because ona means she.

Yes. In many contexts, Serbian present tense covers both ideas that English separates:

• She lives in a house
• She is living in a house

Without extra context, Ona živi u kući is usually understood as the normal present: She lives in a house.

If you want to stress that something is temporary or currently happening, Serbian often relies on context or extra words rather than a separate continuous tense.

You can often leave it out.

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

So both can work:

• Ona živi u kući.
• Živi u kući.

Why keep ona then? Usually for:

• emphasis
• contrast
• clarity

For example:

• Ona živi u kući, a on živi u stanu.
  She lives in a house, and he lives in an apartment.

No, Serbian word order is more flexible than English.

The neutral order here is:

• Ona živi u kući.

But other orders are possible, depending on emphasis:

• Živi u kući. = neutral if the subject is already known
• U kući ona živi. = emphasizes in the house
• Ona u kući živi. = possible, with a special emphasis or style

English usually needs a stricter order, but Serbian can move parts around more freely.

A rough guide:

• Ona = OH-nah
• živi = ZHEE-vee
• u = oo
• kući = KOO-chee, but with a softer ć

A few key sounds:

• ž sounds like the s in measure
• ć is a soft sound, somewhat like a softer ch
• č and ć are different in Serbian, though English speakers often find them hard to separate at first

So the whole sentence is approximately:

OH-nah ZHEE-vee oo KOO-chee

U is a very common preposition. It often means:

• in
• into
• sometimes at, depending on context

The case tells you the difference:

• u + locative = location
  u kući = in the house
• u + accusative = movement into
  u kuću = into the house

So in this sentence, u means in, because the person is located there, not moving there.

Yes. Serbian uses both Latin and Cyrillic scripts.

This sentence in Cyrillic is:

Она живи у кући.

The meaning is exactly the same. Learners should get used to seeing both scripts, since both are standard in Serbian.

It is a completely natural sentence. It is simple, but not unnatural.

It works well as a basic example because it shows several important Serbian features:

• subject pronoun: ona
• present tense verb: živi
• preposition: u
• locative case: kući

In real conversation, speakers might say longer versions if they want more detail, such as:

• Ona živi u velikoj kući. = She lives in a big house.
• Ona živi u kući sa porodicom. = She lives in a house with her family.

But the original sentence is perfectly normal.