Na polici je bila prašina, pa sam uzela krpu i mokru spužvu.

Polici is in the locative singular.

After na, Croatian uses:

• locative for a fixed location: na polici = on the shelf
• accusative for movement toward a place: na policu = onto the shelf

So here, because the dust is already on the shelf and not moving there, na polici is correct.

A useful comparison:

• Knjiga je na polici. = The book is on the shelf.
• Stavila sam knjigu na policu. = I put the book onto the shelf.

Also, the form polici happens to look the same as the dative singular, but in this sentence it is functioning as locative because of na with location.

Croatian past tense is usually formed with:

• the present tense of biti = to be
• plus the past participle

So:

• je = is/has, the 3rd person singular auxiliary here
• bila = past participle, feminine singular

Together, je bila means was.

This is the normal way Croatian forms the past tense:

• sam uzela = I took
• je bila = it was / there was

English has a simple past form like was, but Croatian typically builds it as a two-part form.

Because prašina is a feminine singular noun.

In Croatian past tense, the participle agrees with the subject in:

• gender
• number

So:

• masculine singular: bio
• feminine singular: bila
• neuter singular: bilo

Since the subject is prašina = dust, and prašina is feminine, the sentence uses bila.

Croatian does not need a dummy subject like English there in sentences such as there was dust.

English says:

• There was dust on the shelf.

Croatian simply says:

• Na polici je bila prašina.

So literally it is closer to On the shelf was dust, but the natural meaning is There was dust on the shelf.

This is very normal in Croatian: no separate word is needed for English existential there.

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

So nouns like:

• prašina
• krpu
• spužvu

can mean dust / the dust, a cloth / the cloth, a sponge / the sponge, depending on context.

Croatian usually shows definiteness through:

• context
• word order
• demonstratives such as taj, ova, ona
• general situation

So learners have to get used to the fact that Croatian often leaves this unstated.

Here pa means something like:

• so
• then
• and so

It connects the two parts of the sentence and shows a natural consequence:

• there was dust on the shelf,
• so I took a cloth and a wet sponge.

It is very common in spoken and everyday Croatian.

Compared with i:

• i = and
• pa = and so / then / so

So pa adds a slight sense of sequence or result, not just simple addition.

Because sam is a clitic, and Croatian clitics usually go in the second position in the clause.

After the conjunction pa, the clitic comes immediately:

• pa sam uzela

That is the most natural order here.

In a standalone sentence, you can also say:

• Uzela sam krpu. = I took a cloth.
• Ja sam uzela krpu. = I took a cloth.

But after pa, pa sam uzela is the normal pattern.

This is one of the trickier parts of Croatian word order for English speakers: clitics like sam, si, je, ga, mi often have to go near the beginning of the clause rather than where English speakers expect them.

Yes. Uzela shows that the speaker is female.

In the Croatian past tense, the participle agrees with the subject's gender, even in the first person singular:

• uzeo sam = I took, said by a male speaker
• uzela sam = I took, said by a female speaker

English does not do this, so this is often surprising for learners.

In this sentence, sam tells you it is I, and uzela tells you the speaker is female.

Because they are direct objects, so they are in the accusative case.

The verb uzeti = to take, and what is taken goes in the accusative:

• uzela sam krpu
• uzela sam spužvu

Both krpa and spužva are feminine nouns ending in -a, and in the accusative singular they usually change to -u:

• krpa → krpu
• spužva → spužvu

This is a very common pattern in Croatian.

Because the adjective has to agree with the noun in:

• gender
• number
• case

Here spužvu is:

• feminine
• singular
• accusative

So the adjective must also be feminine singular accusative:

• mokra → nominative
• mokru → accusative

That is why you get:

• mokra spužva = a wet sponge
• uzela sam mokru spužvu = I took a wet sponge

By default, it describes only spužvu.

So the phrase means:

• a cloth and a wet sponge

not

• a wet cloth and a wet sponge

Croatian usually makes this clear through agreement and position. Since mokru is placed right before spužvu, it naturally modifies only that noun.

If the speaker wanted to say both were wet, they would usually phrase it differently.

Yes. That would also be correct.

Croatian word order is more flexible than English, and changing the order often changes emphasis, not the core meaning.

Compare:

• Na polici je bila prašina.
  Focuses first on the location, or sets the scene: On the shelf, there was dust.

• Prašina je bila na polici.
  Focuses more on dust as the topic: The dust was on the shelf.

The sentence you were given sounds natural because it introduces the setting first and then explains the reaction.

Because Croatian often omits subject pronouns when they are already clear from the verb form. This is called a pro-drop language.

In:

• sam = I am / auxiliary for I
• uzela = feminine past participle

the subject is already obvious, so ja is unnecessary.

Croatian speakers usually add ja only for emphasis, contrast, or clarity:

• Ja sam uzela krpu, ne on. = I took the cloth, not him.

So in your sentence, leaving out ja is completely normal.

No. Spužva is standard and very common, but learners may also hear regional alternatives, especially sunđer in some varieties.

So depending on the region, both may appear, but spužva is perfectly standard Croatian and exactly what you would expect in this sentence.

Mostly yes. The sentence is arranged in a very natural narrative way:

1. Na polici je bila prašina — first, the situation
2. pa sam uzela krpu i mokru spužvu — then, the response

This mirrors how Croatian often tells short events:

• describe the circumstance
• then show what happened next

So the structure feels smooth and logical, especially in everyday speech or storytelling.