Upakovala sam poklon.

It is the past tense in Serbian, specifically the usual compound past often called the perfect.

It is made of:

• upakovala = the l-participle (past participle-like form)
• sam = I am, the auxiliary verb from biti (to be)

So:

• upakovala sam = I packed / I wrapped

In Serbian, this is the normal way to say a completed action in the past.

Because the speaker is female.

The participle agrees with the subject’s gender and number:

• upakovao sam = I packed/wrapped (male speaker)
• upakovala sam = I packed/wrapped (female speaker)
• upakovali smo = we packed/wrapped (mixed group or masculine plural)
• upakovale smo = we packed/wrapped (all-female group)

So this sentence tells you that the speaker is a woman.

Because sam is a clitic in Serbian, and clitics usually go in second position in the sentence.

That is why Upakovala sam poklon sounds natural.

Compare:

• Upakovala sam poklon. = natural
• Ja sam upakovala poklon. = also natural, with ja added for emphasis or contrast
• Sam upakovala poklon. = not correct as a normal sentence

So the auxiliary often appears early in the sentence, usually in second position.

Yes. Serbian often omits subject pronouns when they are understood from the verb form and context.

In upakovala sam:

• sam already tells you the person is I
• upakovala tells you the speaker is female

So ja is unnecessary unless you want emphasis:

• Upakovala sam poklon. = I wrapped the gift.
• Ja sam upakovala poklon. = I wrapped the gift. / It was me who wrapped the gift.

Here poklon is in the accusative case, because it is the direct object of the verb.

The verb upakovati takes a direct object:

• upakovati poklon = to wrap/pack a gift

For many masculine inanimate nouns in Serbian, the accusative singular looks the same as the nominative singular.

So:

• nominative: poklon = gift
• accusative: poklon = gift

That is why the form does not change here.

It comes from the perfective verb upakovati.

That means the action is viewed as completed:

• Upakovala sam poklon. = I finished wrapping/packing the gift.

A related imperfective verb would be:

• pakovati = to pack / to be packing / to pack habitually

Compare:

• Pakovala sam poklon. = I was wrapping the gift / I wrapped gifts (depending on context, but less clearly focused on completion)
• Upakovala sam poklon. = I wrapped the gift completely

So the prefix u- often helps give the sense of a completed result here.

Yes, depending on context.

Upakovati poklon can mean:

• to wrap a gift
• to pack up a gift
• sometimes more generally to package a gift

In English, the best translation depends on the situation:

• if you mean decorative paper: I wrapped the gift
• if you mean putting it into a box/package: I packed the gift
• if you mean preparing it for giving or shipping: I packaged the gift

So the Serbian verb is a bit broader than one single English verb.

Yes, you may hear spakovala sam poklon too, but the nuance can vary by context and speaker.

Very roughly:

• upakovati often suggests wrapping / packaging
• spakovati often suggests packing up / putting together / getting ready

With poklon, both can be possible, but:

• upakovati poklon often sounds more like wrap/package a gift
• spakovati poklon can sound more like pack the gift up

In everyday speech, there can be overlap, and usage may vary regionally.

Because Serbian has no articles like English a/an/the.

So poklon can mean:

• a gift
• the gift

Which one it means depends on context.

So:

• Upakovala sam poklon. can mean I wrapped a gift or I wrapped the gift
• Usually the situation makes it clear

If you need to be more specific, Serbian uses other words, word order, or context rather than articles.

The dictionary form is upakovati.

When looking up Serbian verbs, you normally look for the infinitive:

• upakovati = to pack / to wrap / to package

From that you get forms like:

• upakujem = I pack / I will pack (depending on aspect and context)
• upakovala sam = I packed / I wrapped (female speaker)
• upakovao sam = I packed / I wrapped (male speaker)

So if you want to find this verb in a dictionary, search for upakovati.

The word order is somewhat flexible, but not completely free.

Common possibilities include:

• Upakovala sam poklon. = neutral, very natural
• Poklon sam upakovala. = emphasizes the gift
• Ja sam upakovala poklon. = emphasizes I
• Poklon sam ja upakovala. = stronger contrast, like I’m the one who wrapped the gift

What usually stays true is that the clitic sam goes near the beginning, in second position.

So yes, the sentence can be rearranged for emphasis, but Upakovala sam poklon is a standard neutral version.