Moj omiljeni predmet u školi je povijest.

Because predmet is a masculine singular noun in the nominative case, and both moj (my) and omiljeni (favorite) must agree with it.

So:

• moj = masculine singular nominative
• omiljeni = masculine singular nominative
• predmet = masculine singular nominative

Croatian adjectives and possessives change form to match the noun’s gender, number, and case.

Here, predmet means school subject.

Although predmet can also mean object or item in other contexts, in a school sentence like this, it clearly means subject.

So:

• školski predmet = school subject
• omiljeni predmet = favorite subject

Because u here means in, and after u when talking about location, Croatian uses the locative case.

The noun škola changes like this:

• škola = school (nominative)
• u školi = in school / at school (locative)

So u školi literally means in school or at school.

It changes because it is in the locative singular after u expressing location.

This is a normal case change in Croatian:

• škola → nominative
• školi → locative/dative singular

In this sentence, u školi is a fixed and very common phrase meaning at school or in school.

Je is the 3rd person singular form of the verb biti (to be), meaning is.

So:

• Moj omiljeni predmet u školi je povijest.
• literally: My favorite subject at school is history.

Croatian often uses je in sentences like this to connect two nouns, just like English uses is.

In normal standard Croatian, je should be included here.

You may sometimes hear shortened or more casual speech where parts of to be are dropped, but for learners, the correct standard sentence is:

• Moj omiljeni predmet u školi je povijest.

So in this kind of sentence, keep je.

Because povijest is the predicate noun after je, and it stays in the nominative case.

So:

• povijest = history
• It remains nominative here, just as in English we say History is... or My favorite subject is history.

Even though povijest ends in -st, it is a feminine noun, but in this sentence it does not need a different form.

Yes. Many Croatian feminine nouns do end in -a, but some do not. Povijest is one of those feminine nouns.

That is something learners often just need to memorize. Another clue is how such nouns decline in other cases, but in the nominative singular, povijest is simply feminine.

Because Croatian does not have articles like a, an, or the.

So English:

• My favorite subject in school is history.

Croatian:

• Moj omiljeni predmet u školi je povijest.

The meaning of definiteness is understood from context, not from an article.

Yes, often you can.

• omiljeni = favorite
• najdraži = dearest / favorite / most liked

So this is also natural:

• Moj najdraži predmet u školi je povijest.

Both work, though omiljeni is a very direct match for favorite.

Not completely. Croatian word order is more flexible than English word order.

The neutral, natural version is:

• Moj omiljeni predmet u školi je povijest.

But other orders are possible for emphasis, for example:

• Povijest je moj omiljeni predmet u školi.

That puts more focus on history.

Still, learners should usually stick with the original version unless they have a reason to emphasize something.

A simple pronunciation guide:

• Moj ≈ moy
• omiljeni ≈ oh-MEEL-yeh-nee
• predmet ≈ PRED-met
• u ≈ oo
• školi ≈ SHKO-lee
• je ≈ yeh
• povijest ≈ poh-VYEST

A few useful sound notes:

• j is pronounced like English y in yes
• š is pronounced like sh
• ije in povijest can be tricky; listen to native audio if possible

It can mean either, depending on context.

In this sentence, the natural English meaning is usually:

• My favorite subject at school is history.

But literally, u školi is in school.

Croatian often uses u školi where English might prefer at school.

Yes, that is also correct.

• školski predmet = school subject

So:

• Moj omiljeni školski predmet je povijest.

This version is a bit more compact than predmet u školi, and both are understandable and natural.

Because names of school subjects in Croatian are normally not capitalized, unless they begin a sentence.

So:

• volim povijest = I like history
• Moj omiljeni predmet u školi je povijest.

This is different from some English usage, where school subjects are also usually lowercase, except in some special cases.

Yes, but the structure changes.

For example:

• Moj omiljeni predmet u školi je povijest.
  = My favorite subject at school is history.

You could also say:

• Meni je omiljeni predmet u školi povijest.

That version adds emphasis to meni (to me / for me), but for most learners, the original sentence is the simplest and most neutral.

It is in the nominative case because it is the subject of the sentence.

The basic structure is:

• [Moj omiljeni predmet u školi] = subject
• je = verb
• povijest = predicate noun

So the first noun phrase is nominative, and povijest is also nominative after je.