Bibliotekar će proveriti signaturu.

It is the future tense in Serbian, often called Future I.

• će = the future auxiliary
• proveriti = to check / to verify

So će proveriti means will check.

In this sentence:

• Bibliotekar = the librarian
• će proveriti = will check
• signaturu = the call number / shelf mark / signature

Serbian often forms the future with:

• the clitic auxiliary ću, ćeš, će, ćemo, ćete, će
• plus the infinitive

So:

• ja ću proveriti = I will check
• on/ona će proveriti = he/she will check

With a full noun subject like bibliotekar, the auxiliary usually appears as a separate word:

• Bibliotekar će proveriti signaturu.

You may also see joined forms like proveriće, but those are much more typical when there is no separate word in front of the auxiliary, or in slightly different word-order patterns. For a learner, Bibliotekar će proveriti is the most straightforward pattern to recognize.

Because će is a clitic. Clitics in Serbian usually go in the second position of the clause.

So in:

• Bibliotekar će proveriti signaturu.

the first unit is Bibliotekar, and će comes right after it.

This is a very common Serbian pattern. Compare:

• Student će doći. = The student will come.
• Moja sestra će pomoći. = My sister will help.

Proveriti is the infinitive form of the verb, meaning to check / to verify.

In the future tense, Serbian commonly uses:

• auxiliary + infinitive

So:

• će proveriti = will check

This is similar to English will check, where will is followed by the base form of the verb.

Because signaturu is in the accusative case.

The verb proveriti takes a direct object: what will the librarian check?
Answer: signaturu.

The noun’s basic form is:

• signatura = nominative singular

But as a direct object in this sentence, it becomes:

• signaturu = accusative singular

This is a very common pattern for many feminine nouns ending in -a:

• knjiga → knjigu
• adresa → adresu
• signatura → signaturu

Bibliotekar is a masculine noun.

Its basic meaning is librarian. In this sentence, it refers to a male librarian unless context suggests otherwise.

A common feminine form is:

• bibliotekarka = female librarian

So:

• Bibliotekar će proveriti signaturu. = The male librarian will check the call number.
• Bibliotekarka će proveriti signaturu. = The female librarian will check the call number.

Yes, it matters. Proveriti is perfective.

That means it presents the action as a completed whole: the librarian will check it and complete that checking.

A related imperfective verb is:

• proveravati = to be checking / to check repeatedly / to check in an ongoing or habitual sense

So:

• Bibliotekar će proveriti signaturu. = The librarian will check the call number.
  (one completed checking action)

Compare:

• Bibliotekar će proveravati signaturu.
  = The librarian will be checking / will check repeatedly.

For a simple one-time future action, proveriti is very natural.

Yes, Serbian word order is fairly flexible, but the neutral order here is very natural:

• Bibliotekar će proveriti signaturu.

You might also see other orders for emphasis, such as:

• Signaturu će proveriti bibliotekar.
  = It is the call number that the librarian will check.
• Proveriće signaturu bibliotekar.
  = The librarian will check the call number.
  (more marked/stylistic)

Even when word order changes, the clitic će still follows the first element of the clause.

No. Serbian does not use articles like English a and the.

So bibliotekar can mean:

• a librarian
• the librarian

and signaturu can mean:

• a call number
• the call number

Context tells you which meaning is intended.

That is why one Serbian sentence can correspond to slightly different English translations.

Yes. Serbian often omits the subject when it is clear from context.

So you could say:

• Proveriće signaturu. = He/she will check the call number.
• Će proveriti signaturu is not a normal standalone sentence, because clitics like će cannot usually stand at the very beginning.

If the subject is omitted, Serbian often uses the attached future form:

• Proveriće signaturu.

The letter ć is a soft consonant, somewhat similar to the ty sound in tune in some English accents, but not exactly the same.

So će is pronounced roughly like:

• tyeh or cheh, but softer than English ch

A rough pronunciation guide for the whole sentence might be:

• Bee-blee-oh-teh-kar cheh პრო-VEH-ree-tee seeg-na-TOO-roo

That is only approximate, but the key point is:

• ć is softer than č
• će is a very common future auxiliary, so it is worth getting used to hearing and saying it

It looks similar, but in library or archival contexts it usually does not mean a person’s handwritten signature.

In sentences like this, signatura often means something like:

• call number
• shelf mark
• catalog/reference code

So even though the word resembles English signature, you should learn it according to context. This is a good example of a false friend risk.

You keep the infinitive proveriti and change the future auxiliary:

• Ja ću proveriti signaturu. = I will check the call number.
• Ti ćeš proveriti signaturu. = You will check the call number.
• On će proveriti signaturu. = He will check the call number.
• Ona će proveriti signaturu. = She will check the call number.
• Mi ćemo proveriti signaturu. = We will check the call number.
• Vi ćete proveriti signaturu. = You (plural/formal) will check the call number.
• Oni će proveriti signaturu. = They will check the call number.

This is a very useful pattern to memorize.