Moj otac danas rano kupuje novine u prodavnici.

Moj is the masculine singular nominative form of my.

It matches otac because:

• otac = father
• it is masculine
• it is singular
• here it is the subject of the sentence, so it is in the nominative case

So:

• moj otac = my father

If the noun changed, the possessive would change too. For example:

• moja majka = my mother
• moje dete = my child

Yes. Otac is the standard word for father.

A learner should also know that in everyday speech, people often say:

• tata = dad
• otac = father (more neutral or formal)

So moj otac sounds natural, but slightly more formal than moj tata.

Serbian usually does not need auxiliary words like English is or does in a simple present-tense sentence.

In English, you say:

• My father buys newspapers

In Serbian, the verb kupuje already contains the information he/she buys.

So:

• kupuje = buys / is buying depending on context

That means Serbian can express the whole action with one verb form, without adding a separate word like does.

Kupuje is the 3rd person singular present tense of the verb kupovati.

It means:

• he buys
• she buys
• sometimes is buying, depending on context

It is used because the subject is moj otac = my father, which is:

• 3rd person
• singular

Basic pattern:

• ja kupujem = I buy
• ti kupuješ = you buy
• on/ona kupuje = he/she buys

So moj otac danas rano kupuje... means my father buys / is buying...

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

• kupovati = imperfective verb
  Used for repeated, ongoing, habitual, or not fully bounded actions.
• kupiti = perfective verb
  Used when the action is seen as completed.

In the present tense:

• kupuje from kupovati can mean buys / is buying
• the present tense of a perfective verb like kupiti usually refers to a future meaning, not a normal present action

So in a sentence like this, kupuje is the natural choice for a present-time action.

Yes, novine is a plural form and often behaves like a plural-only noun in everyday use.

In many contexts, Serbian uses novine where English might say either:

• a newspaper
• the newspaper
• newspapers

So kupuje novine is a very natural expression meaning buys the newspaper / buys newspapers, depending on context.

This can feel strange to English speakers, but it is normal Serbian usage.

It is changing form logically, but here the accusative looks the same as the nominative.

The direct object of kupuje should be in the accusative case.
The noun novine is feminine plural, and for this noun the forms are:

• nominative plural: novine
• accusative plural: novine

So the case is correct; it just happens that the form does not visibly change.

That is common in Serbian: sometimes different cases have the same form.

Because after u meaning in, Serbian uses the locative case.

The base noun is:

• prodavnica = store, shop

Its locative singular form is:

• u prodavnici = in the store

So:

• u
  • location = usually locative
• u prodavnici = in the shop

If the meaning were motion into the shop, Serbian would usually use the accusative:

• u prodavnicu = into the shop

Serbian has no articles like English a and the.

So prodavnica / prodavnici can mean:

• a store
• the store
• sometimes just store in a general sense

The exact meaning depends on context.

So u prodavnici could be understood as:

• in a store
• in the store
• at the store, depending on the situation

This is one of the biggest differences from English.

Yes, Serbian word order is relatively flexible.

This sentence is perfectly natural, and its order gives a neutral flow:

• Moj otac = subject
• danas rano = time expression
• kupuje = verb
• novine = object
• u prodavnici = place

But other orders are also possible, for example:

• Moj otac kupuje novine danas rano u prodavnici.
• Danas moj otac rano kupuje novine u prodavnici.
• U prodavnici moj otac danas rano kupuje novine.

These alternatives shift emphasis or sound slightly different in style, but the basic meaning stays similar.

Because Serbian usually does not need subject pronouns when the subject is already clear.

Here the subject is explicitly stated:

• Moj otac = my father

So adding on would be unnecessary in a neutral sentence.

Serbian often omits pronouns because the verb form already helps identify the person:

• kupujem = I buy
• kupuješ = you buy
• kupuje = he/she buys

You can use on for emphasis or contrast, but it is not needed here.

Yes, it is natural. They are adverbial expressions.

• danas = today
• rano = early

Together they tell us when the action happens:

• today
• early

So they modify the verb kupuje.

A learner should notice that Serbian often places time expressions before the verb, but they can move around depending on emphasis.

For example:

• Moj otac danas rano kupuje novine.
• Moj otac kupuje novine danas rano.

Both are possible, though the first sounds more neutral here.