Moja supruga sačuvala je račune.

Because supruga is a feminine singular noun, and the possessive adjective moj (my) has to agree with it in gender, number, and case.

• masculine: moj
• feminine: moja
• neuter: moje

So:

• moj muž = my husband
• moja supruga = my wife

Here, moja is feminine singular nominative, matching supruga.

It is in the nominative singular, because it is the subject of the sentence.

The subject is the person doing the action, and here that is my wife.

• moja supruga = nominative singular
• she is the one who saved/kept something

Croatian normally forms the past tense with:

1. a past participle
2. a present-tense form of biti (to be)

So sačuvala je is literally built from:

• sačuvala = past participle, feminine singular
• je = is/has-type auxiliary, 3rd person singular

Together, they mean saved / kept / preserved in the past.

This is the standard Croatian past tense structure:

• sačuvao je = he saved
• sačuvala je = she saved
• sačuvali su = they saved

Both can exist, but Croatian has special placement rules for short unstressed words called clitics, and je is one of them.

In a neutral sentence, you will often see:

• Moja supruga je sačuvala račune.

But Croatian also very commonly allows:

• Moja supruga sačuvala je račune.

This word order is natural and common. The auxiliary je tends to appear near the beginning of the clause, but not necessarily directly before the participle the way English learners might expect.

So this sentence is perfectly normal. It may sound a little more flowing or stylistically polished than the most basic learner order.

Because the subject is feminine singular: moja supruga.

In the Croatian past tense, the participle agrees with the subject in gender and number.

Compare:

• sačuvao je = he saved
• sačuvala je = she saved
• sačuvalo je = it saved
• sačuvali su = they saved (masculine/mixed)
• sačuvale su = they saved (all feminine)

Since supruga is feminine singular, the correct form is sačuvala.

The dictionary form is sačuvati.

That is the infinitive, meaning to save, to keep, to preserve, depending on context.

So the sentence is built from:

• infinitive: sačuvati
• past feminine singular participle: sačuvala

This is a very important Croatian verb pair:

• čuvati = imperfective
• sačuvati = perfective

Very roughly:

• čuvati focuses on the process, repetition, or ongoing action: to keep, to guard, to be keeping
• sačuvati focuses on a completed result: to save, to keep successfully, to preserve

In this sentence, sačuvala suggests that the action was completed: the wife did keep/save the receipts, and the result matters.

If you used čuvala, it would feel more like an ongoing or habitual action in the past, depending on context.

Because račune is the accusative plural form of račun.

Here, računi/račune are the direct object — the thing that was saved/kept.

Singular:

• nominative: račun
• accusative: račun

Plural:

• nominative: računi
• accusative: račune

So:

• računi = receipts/bills/accounts as a subject
• račune = receipts/bills/accounts as an object

In this sentence, they are the object of sačuvala je, so Croatian uses račune.

Račun can mean several things depending on context, such as:

• bill
• invoice
• receipt
• account
• calculation

In this sentence, the intended meaning is likely receipts or bills/invoices, depending on the translation you were given.

That is very normal in Croatian: one noun can cover several related English meanings, and context tells you which one is meant.

Yes. Croatian word order is more flexible than English because case endings show what each word is doing.

Possible versions include:

• Moja supruga sačuvala je račune.
• Moja supruga je sačuvala račune.
• Račune je sačuvala moja supruga.

These all mean roughly the same basic thing, but the emphasis changes:

• Moja supruga... puts focus on my wife
• Račune... puts focus on the receipts/bills

So Croatian can move words around more than English, but the choice usually affects style, emphasis, or information structure.

Yes. Because the verb is perfective (sačuvati), it normally implies a completed action with a result.

So Moja supruga sačuvala je račune suggests:

• she kept them
• the action is completed
• the receipts/bills were indeed preserved

This is one of the main things aspect tells you in Croatian. The sentence is not just about the action happening; it is about the successful result.