Neko me je pozvao.

Neko means someone or somebody. Here it is the subject of the sentence, so it is in the nominative case.

Its basic form is neko, and that is the form you use when someone is doing the action.

Because me is the object form of I.

• ja = I (subject form)
• me / mene = me (object form)

In Neko me je pozvao, someone is doing the action, and me is receiving the action, so Serbian uses me, not ja.

Je is the 3rd person singular present form of biti (to be), and here it works as an auxiliary verb to form the past tense.

So the sentence is built like this:

• neko = someone
• me = me
• je = has/is used as the past-tense helper
• pozvao = called

Serbian often forms the past tense with:

• a form of biti
• plus the -l participle of the main verb

So je pozvao is part of the past-tense construction.

Because pozvao agrees in gender and number with the subject in the past tense.

The subject here is neko, which is treated grammatically as masculine singular, so the verb form is:

• pozvao = masculine singular

Compare:

• On me je pozvao. = He called me.
• Ona me je pozvala. = She called me.
• Oni su me pozvali. = They called me.

Even if the actual person is unknown, neko normally takes the masculine singular form.

Because neko is grammatically treated as a masculine singular pronoun.

This is a grammar rule, not necessarily a statement about the real person’s sex. Serbian often uses the masculine form as the default with words like neko.

So:

• Neko me je pozvao is the normal form.

Because Serbian has special short forms called clitics, and me and je are both clitics.

These clitics usually go in the second position of the sentence or clause, and they appear in a fixed cluster. In this sentence:

• Neko = first element
• me je = clitic cluster
• pozvao = main verb form

So Neko me je pozvao is natural, while Neko je me pozvao is not standard word order.

Yes. Serbian word order is fairly flexible, but different orders can change the focus or emphasis.

For example:

• Neko me je pozvao. = neutral; someone called me.
• Pozvao me je neko. = puts more focus on the fact that it was someone.
• Mene je neko pozvao. = emphasizes me.

So the basic meaning can stay similar, but the nuance changes.

The dictionary form is pozvati.

Pozvao is the past participle form used in the past tense.

So:

• pozvati = to call / to invite
• pozvao = called / invited (masculine singular past form)

Learners often memorize verbs in the infinitive, so the verb you would look up is pozvati.

This is about aspect, which is very important in Serbian.

• pozvati is usually perfective
• zvati is usually imperfective

Very roughly:

• pozvao me je suggests a completed single action: someone called me
• zvao me je can suggest repeated action, ongoing action, or sometimes simply a less bounded event, depending on context

So Neko me je pozvao sounds like someone called me once / someone gave me a call / someone invited me as a completed event.

Yes. Depending on context, pozvati can mean:

• to call
• to invite
• sometimes to summon

So Neko me je pozvao could mean different things in different situations. The wider context tells you which meaning is intended.

Yes. In this sentence, me is the accusative clitic form of ja because it is the direct object of the verb.

Compare:

• On vidi mene / me. = He sees me.
• Neko me je pozvao. = Someone called me.

Serbian often uses the short clitic form me instead of the full form mene when there is no special emphasis.

Both can mean me, but they are used differently.

• me = short, unstressed clitic form
• mene = full, stressed form

In a neutral sentence, Serbian normally uses me:

• Neko me je pozvao.

If you want emphasis, contrast, or certain prepositional constructions, you often use mene:

• Mene je neko pozvao. = It was me that someone called.
• Bez mene = without me

So me is the normal choice here.

Serbian does not form the past in the same way as English. This sentence is in the common Serbian past tense called perfekat.

It is formed with:

• the auxiliary biti
• plus the past participle

So me je pozvao is a normal past-tense construction in Serbian, even though word-for-word it may look unusual to an English speaker.

You would negate the auxiliary:

• Niko me nije pozvao. = Nobody called me.
• Neko me nije pozvao. = Someone didn’t call me.
  This is grammatically possible, but it means a different thing and is less likely unless the context clearly sets up someone as a specific expected person.

Notice:

• je becomes nije in negation

A simple spoken question can often be made just by intonation:

• Neko me je pozvao? = Someone called me?

A more standard yes/no question is often:

• Da li me je neko pozvao? = Did someone call me?

This version is very common and natural.

Yes, it is completely natural.

Neko me je pozvao is a normal everyday sentence and sounds like standard spoken and written Serbian. It is a good example of:

• an indefinite subject (neko)
• an object clitic (me)
• a past tense with auxiliary (je)
• a masculine singular past participle (pozvao)