Frižider je prazan i danas moram da kupim mleko i jaja.

Je is the 3rd person singular present tense of biti (to be).

So:

• Frižider = refrigerator / fridge
• je = is
• prazan = empty

Together, Frižider je prazan means The fridge is empty.

In Serbian, just like in English, you normally need the verb to be in this kind of sentence.

Because frižider is a masculine singular noun, and adjectives must agree with the noun they describe.

So:

• masculine singular: prazan
• feminine singular: prazna
• neuter singular: prazno

Examples:

• frižider je prazan = the fridge is empty
• soba je prazna = the room is empty
• mesto je prazno = the place is empty

This agreement is a very important feature of Serbian grammar.

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

So frižider can mean:

• a fridge
• the fridge

and the exact meaning depends on context.

The same is true for:

• mleko = milk / the milk / some milk
• jaja = eggs / the eggs / some eggs

English speakers often expect an article, but Serbian simply does not use one.

After modal verbs like morati (must / have to), Serbian very often uses:

moram da + present tense

So:

• moram da kupim = I have to buy / I must buy

This is one of the most common Serbian patterns.

Compare:

• moram da idem = I have to go
• moram da radim = I have to work
• moram da kupim mleko = I have to buy milk

For an English speaker, this may feel a little like I must that I buy, but that is just how Serbian structures it.

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

• kupiti / kupim = perfective → to buy, as a single completed action
• kupovati / kupujem = imperfective → to be buying, to buy repeatedly/habitually

In this sentence, the speaker means a single needed action: they need to go buy milk and eggs. So kupim is the natural choice.

• moram da kupim mleko i jaja = I need to buy milk and eggs (one shopping action)

If you said moram da kupujem, it would sound more like repeated or ongoing buying, which is not the main idea here.

Because the verb form already shows the subject.

• moram = I must / I have to

So Serbian often drops subject pronouns when they are obvious from the verb ending.

You could say:

• Danas moram da kupim mleko i jaja.

or

• Danas ja moram da kupim mleko i jaja.

But the version without ja is more neutral and more natural in many situations.

Adding ja usually gives extra emphasis, something like:

• I have to buy it today

They are the direct objects of kupim, so they are in the accusative case.

However, for these particular nouns, the accusative looks the same as the basic dictionary form:

• mleko = nominative singular / accusative singular
• jaja = nominative plural / accusative plural

So even though they are objects, their forms do not visibly change here.

This is very common in Serbian with many neuter nouns.

Jaja is plural.

The singular is:

• jaje = egg

The plural is:

• jaja = eggs

So:

• kupim jaje = buy an egg
• kupim jaja = buy eggs

English speakers sometimes find this surprising because jaja may not look obviously plural at first, but it is a normal neuter plural form in Serbian.

Yes. Serbian word order is fairly flexible.

These are all possible:

• Frižider je prazan i danas moram da kupim mleko i jaja.
• Frižider je prazan i moram danas da kupim mleko i jaja.
• Danas moram da kupim mleko i jaja, frižider je prazan.

The original sentence is completely natural, but moving danas can slightly change what is emphasized.

• danas moram... emphasizes today
• moram da kupim... keeps the focus more on the obligation itself

So word order often affects emphasis rather than basic meaning.

A rough English-friendly guide:

• frižider ≈ free-zhee-der
• je ≈ ye
• jaja ≈ ya-ya

A few useful sound notes:

• ž sounds like the s in measure
• Serbian j sounds like English y
• each written letter is pronounced quite consistently in Serbian

So the whole sentence is roughly:

FREE-zhee-der ye PRA-zan ee DA-nas MO-ram da KOO-peem MLE-ko ee YA-ya

This is only an approximation, but it is a good start.

Yes, frižider is a very common everyday word for fridge / refrigerator in Serbian.

You may also encounter:

• hladnjak = refrigerator / cooler

But in everyday speech, frižider is extremely common and natural.

So for a learner, frižider is absolutely a useful word to know.

Because it connects two different things.

First i connects two clauses:

• Frižider je prazan i danas moram da kupim mleko i jaja
• The fridge is empty and today I have to buy milk and eggs

Second i connects two nouns:

• mleko i jaja = milk and eggs

So both times i means and, but it is linking different parts of the sentence.

A very literal word-for-word breakdown is:

• Frižider = fridge / refrigerator
• je = is
• prazan = empty
• i = and
• danas = today
• moram = I must / I have to
• da kupim = to buy / that I buy
• mleko = milk
• i = and
• jaja = eggs

So the structure is roughly:

Fridge is empty and today I must buy milk and eggs.

That kind of literal breakdown can help you see how Serbian builds the sentence, even if the best English translation is smoother.