Da li ti treba moja olovka?

Da li is a very common way to make a yes/no question in Serbian.

So:

• Treba ti moja olovka. = You need my pencil.
• Da li ti treba moja olovka? = Do you need my pencil?

It does not translate word-for-word into English. It functions more like the English question pattern with do/does/is/are.

Here ti means to you / for you.

It is the dative form used with trebati in this kind of sentence. English says you need my pencil, but Serbian often structures it more like my pencil is needed to you.

A useful thing to notice is that ti here is not the subject in the English sense. It is the person affected by the need.

The stressed/emphatic form would be tebi:

• Da li tebi treba moja olovka? = Do you need my pencil? / Do you need my pencil?

Because in this sentence, Serbian is not using the same structure as English.

In English:

• you = subject
• need = verb

In this Serbian pattern:

• moja olovka = grammatical subject
• ti = dative experiencer, meaning to you
• treba = is needed

So the verb is treba because the thing needed is moja olovka, which is singular.

That is why Serbian says:

• Treba ti moja olovka.

not:

• Trebaš moja olovka. ❌

Because with trebati in this construction, the thing needed is treated as the subject, not as a direct object.

So moja olovka stays in the nominative:

• moja olovka = nominative

If it were a direct object, you would expect the accusative:

• moju olovku = accusative

Compare:

• Da li ti treba moja olovka? = Do you need my pencil?
• Imaš li moju olovku? = Do you have my pencil?

In the second sentence, moju olovku is a direct object, so it is accusative.

Because moja has to agree with olovka in gender, number, and case.

• olovka is feminine singular nominative
• so the possessive must also be feminine singular nominative
• therefore: moja olovka

If the noun were in the accusative, then you would get:

• moju olovku

So:

• moja olovka = nominative
• moju olovku = accusative

Yes. That is also correct.

Both mean the same thing:

• Da li ti treba moja olovka?
• Treba li ti moja olovka?

The version with da li is very common and neutral. The version with verb + li can sound a bit more compact or slightly more formal/written, depending on context.

In everyday speech, you may also hear:

• Je l' ti treba moja olovka?

That is more informal/colloquial.

Yes. Ti is the informal singular form of you.

If you want to be polite, or if you are talking to more than one person, use vam:

• Da li vam treba moja olovka?

So:

• ti = informal singular you
• vam = polite singular or plural you

If you want extra emphasis, you can use tebi or vama.

Yes, Serbian word order is fairly flexible, but not completely free.

The most neutral version here is:

• Da li ti treba moja olovka?

You may also hear:

• Da li ti moja olovka treba?

This is still correct, but the emphasis shifts slightly.

One important point: ti is a clitic here, so it usually stays early in the sentence. Serbian clitics often like the second position area of the sentence.

So although word order can move around, not every arrangement sounds equally natural.

Common natural answers would be:

• Da, treba mi. = Yes, I do.
• Ne, ne treba mi. = No, I don't.

You can also answer with the noun:

• Da, treba mi tvoja olovka. = Yes, I need your pencil.
• Ne, ne treba mi tvoja olovka. = No, I don't need your pencil.

Notice that in the answer, the other person’s pencil becomes tvoja olovka from the listener’s point of view.

Yes. This is one of the very normal Serbian ways to express need.

English uses need with a direct subject:

• Do you need my pencil?

Serbian very often uses:

• Da li ti treba moja olovka?

This pattern is extremely common and natural. So even though the literal grammar feels different from English, this is exactly the kind of sentence learners should get used to.