Treba mi olovka i papir za školu.

In this sentence, Serbian uses a very common need pattern:

treba + dative pronoun + thing needed

So Treba mi olovka is literally something like A pencil is needed to me, but naturally it means I need a pencil.

For Serbian learners, this is the safest and most natural pattern to learn first.

• mi = to me
• treba = is needed / is necessary

You may sometimes hear forms like trebam olovku in some varieties of the language, but in standard Serbian, treba mi olovka is the usual and most natural way to express I need a pencil.

mi is the unstressed dative form of ja (I).

So:

• ja = I
• meni = to me, for me
• mi = to me, for me, but in short clitic form

In this sentence, mi means to me / for me:

• Treba mi olovka. = I need a pencil.
• literally: A pencil is needed to me.

If you want to stress it, you can use meni:

• Meni treba olovka, ne tebi. = I need a pencil, not you.

Because in this construction, the things needed are treated more like the grammatical subject of treba, not like a direct object.

So you get:

• Treba mi olovka.
• Treba mi papir.

That is why they appear in the nominative form:

• olovka = nominative singular
• papir = nominative singular

Compare this with a verb that really takes a direct object:

• Imam olovku. = I have a pencil.
• Kupujem olovku. = I am buying a pencil.

There, olovku is accusative. But with treba mi, Serbian normally uses the nominative for the thing needed.

Because the preposition za here requires the accusative case when it means for in the sense of purpose or intended use.

The noun is:

• škola = school

Its accusative singular form is:

• školu

So:

• za školu = for school

This phrase tells you the purpose:

• Treba mi olovka i papir za školu.
• I need a pencil and paper for school.

It usually means for school, in the broad practical sense: school use, schoolwork, class, homework, etc.

So the sentence suggests:

• I need a pencil and paper for school
• not necessarily in order to physically go to the school building

It is a normal, broad expression of purpose.

This is a very common point of confusion.

In sentences like this, treba is often used in a kind of fixed, semi-impersonal way, especially in everyday speech. So even if more than one thing follows, speakers very often still say:

• Treba mi olovka i papir.

You may also encounter:

• Trebaju mi olovka i papir.

But treba mi is very common and natural in Serbian when expressing need.

For a learner, Treba mi olovka i papir is completely safe and idiomatic.

Yes, you may hear that, because there are two items being referred to. However, Treba mi olovka i papir is extremely common and natural, and many speakers prefer it in this kind of sentence.

So the important takeaway is:

• Treba mi olovka i papir = very natural
• Trebaju mi olovka i papir = possible in some usage, but not the form you need to prioritize first

If you are learning Serbian, it is best to get comfortable with treba mi as the default pattern.

Normally, no. mi is a clitic, which means it is an unstressed little word that usually goes near the beginning of the sentence, typically in second position.

So:

• Treba mi olovka. = natural
• Mi treba olovka. = not the normal word order

If you want to emphasize me, you would use the full form:

• Meni treba olovka. = I need a pencil / It’s me who needs a pencil

So:

• mi = short, unstressed, clitic
• meni = full, stressed form

Yes.

• mi is the short, unstressed form
• meni is the full, stressed form

In a neutral sentence, Serbian prefers mi:

• Treba mi olovka.

Use meni when you want contrast, emphasis, or clearer rhythm:

• Meni treba olovka, a njemu papir.
• I need a pencil, and he needs paper.

So in your sentence, mi is the normal choice.

In Serbian, olovka normally means pencil.

If you want to say pen, you would usually say:

• hemijska olovka = ballpoint pen
• often just hemijska in everyday speech

So in this sentence, olovka is best understood as pencil.

It can mean either, depending on context.

In this sentence, papir most naturally means paper in a general practical sense, like the material or some paper to write on. English also does this:

• I need paper.

If you specifically wanted to say a sheet of paper, Serbian often uses:

• list papira = a sheet of paper

But papir by itself is perfectly natural here.

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

So:

• olovka can mean a pencil or the pencil
• papir can mean paper, a paper, or sometimes the paper, depending on context

In your sentence, English naturally translates it as:

• I need a pencil and paper for school.

But Serbian does not need separate article words to express that.

Yes, Serbian word order is more flexible than English, though not completely free.

The neutral version is:

• Treba mi olovka i papir za školu.

But you could also hear versions like:

• Za školu mi treba olovka i papir.
• Olovka i papir mi treba za školu.

These shifts usually change emphasis rather than core meaning.

For example:

• Za školu mi treba olovka i papir. emphasizes for school
• Olovka i papir mi treba za školu. emphasizes the items needed

For learners, the original sentence is the most straightforward and natural starting point.