Iza ograde se kretalo veliko stado ovaca.

Iza ograde means behind the fence.

Croatian often puts a location phrase first to set the scene, especially in descriptive sentences. So the sentence literally begins with the setting:

• Iza ograde = behind the fence
• se kretalo = was moving / moved
• veliko stado ovaca = a large flock of sheep

This word order is very natural in Croatian and gives the sentence a slightly narrative feel: first the place, then what was happening there.

Because iza here requires the genitive case when it means behind in a static location sense.

The noun is:

• ograda = fence

In the genitive singular, it becomes:

• ograde = of the fence / behind the fence

So:

• iza ograde = behind the fence

This is one of the important things to learn with prepositions in Croatian: you often need to memorize which case they take.

Not always.

With iza, the case depends on the meaning:

• genitive for location: behind
• accusative for motion toward a position behind something

Examples:

• Iza ograde stoji pas. = The dog is standing behind the fence.
  → location, so genitive

• Otišao je iza ogradu is not standard Croatian.
  Standard Croatian would normally express motion differently, for example:

  • Otišao je iza ograde. can sometimes still be understood as movement ending behind the fence, but the distinction is often less rigid in everyday use than in some textbook explanations.

  For this sentence, the important point is simple: iza ograde means behind the fence, so ograde is genitive.

Kretati se is a verb meaning to move, to be moving, to go along, or to be in motion.

So:

• kretalo se or, with normal clitic placement, se kretalo = was moving / moved

In this sentence, it suggests motion in a general sense, not a single sharp action. A natural English translation is often:

• A large flock of sheep was moving behind the fence.

The se is part of the verb kretati se. You usually learn it together as one unit.

Not really in the English sense.

In Croatian, se often appears in verbs that are traditionally called reflexive, but in many cases it does not translate as itself.

Here, kretati se is simply the normal verb for to move. You should think of it as a dictionary form:

• kretati = to move something / to set in motion
• kretati se = to move, to be moving

So se is not adding a separate meaning like itself in English. It is just part of how this verb is used.

Because the grammatical subject is stado, not ovaca.

• stado = flock, herd
• ovaca = of sheep

So veliko stado ovaca means literally:

• a large flock of sheep

The head noun is stado, and stado is:

• singular
• neuter

Therefore the past tense verb must also be:

• singular neuter → kretalo

That is why Croatian says:

• Veliko stado ovaca se kretalo.

not:

• *Veliko stado ovaca se kretale.

Even though sheep are plural in meaning, the grammar follows stado.

Because stado is a neuter noun.

Croatian adjectives must agree with the noun in:

• gender
• number
• case

The noun stado is:

• neuter
• singular
• here in the nominative

So the adjective must also be neuter singular nominative:

• veliko stado = a large flock

Compare:

• veliki pas = a big dog masculine
• velika kuća = a big house feminine
• veliko stado = a big flock neuter

Because ovaca is genitive plural of ovca.

• ovca = sheep singular
• ovce = sheep plural nominative
• ovaca = of sheep genitive plural

In stado ovaca, Croatian uses a structure like:

• stado ovaca = a flock of sheep
• krdo konja = a herd of horses
• jato ptica = a flock of birds

So ovaca depends on stado and answers the idea a flock of what? → of sheep.

It is a noun phrase built like this:

• veliko = large
• stado = flock / herd
• ovaca = of sheep

So the structure is:

adjective + main noun + genitive plural noun

In other words:

• veliko stado ovaca = a large flock of sheep

The most important noun grammatically is stado, and everything else depends on it.

This is due to Croatian clitic placement.

The word se is a clitic, and clitics usually appear near the beginning of the clause, often in second position.

That is why Croatian prefers:

• Iza ograde se kretalo veliko stado ovaca.

rather than:

• Iza ograde kretalo se veliko stado ovaca.

The second version can also occur, but se very often comes early in the sentence. For learners, the key point is:

• se usually does not stay right next to the infinitive the way English words do
• its position is controlled by Croatian clitic rules

Yes. That is also grammatical.

Croatian word order is more flexible than English word order. Different orders can sound more natural depending on what you want to emphasize.

Compare:

• Iza ograde se kretalo veliko stado ovaca.
  → emphasizes the scene/location first

• Veliko stado ovaca se kretalo iza ograde.
  → emphasizes the flock first

Both mean essentially the same thing, but the focus changes slightly.

It is the past tense.

More specifically, Croatian past tense is formed with:

• the past participle
  plus
• a present-tense form of biti (to be)

In this sentence, the auxiliary is not visible because with neuter singular third person, in ordinary usage you often just see the participle form in contexts like this explanation. The important learner takeaway is:

• kretalo = past, agreeing with a neuter singular subject

From the infinitive:

• kretati se = to move / to be moving

Past participle forms include:

• kretao se = masculine singular
• kretala se = feminine singular
• kretalo se = neuter singular
• kretali su se = masculine personal plural
• kretale su se = feminine / non-masculine plural

Here it is kretalo se because of stado.

Because kretati se is more general.

It means something like:

• to move
• to be in motion
• to make one’s way

That works well for a group of animals. It does not focus on the exact manner of movement.

If Croatian used a more specific verb, the image would change:

• hodati = to walk
• trčati = to run
• ići = to go

But kretati se is broader and often sounds natural in descriptive writing.

No.

Stado is a collective noun meaning herd or flock, depending on the animal. It is often used for grazing animals or grouped domestic animals.

Examples:

• stado ovaca = flock of sheep
• stado koza = herd/flock of goats
• stado krava = herd of cows

For birds, Croatian often prefers:

• jato ptica = flock of birds

So stado is not exclusive to sheep, though it fits very naturally here.

A fairly literal breakdown is:

• Iza = behind
• ograde = the fence genitive
• se kretalo = was moving / moved
• veliko stado ovaca = a large flock of sheep

So a literal translation would be:

• Behind the fence was moving a large flock of sheep.

A more natural English version is:

• A large flock of sheep was moving behind the fence.
• Behind the fence, a large flock of sheep was moving.

Both capture the meaning well.