Proveriću sistem.

In Serbian, the subject pronoun is often omitted when the verb already shows who is doing the action.

Here, proveriću already means I will check, so ja is not necessary.

You can add ja if you want emphasis or contrast:

• Ja ću proveriti sistem. = I will check the system.

Without ja, the sentence sounds neutral and natural.

Proveriću is the future tense called Future I in Serbian.

It means I will check.

The base verb is proveriti = to check / to verify, and the future meaning comes from the auxiliary ću = I will.

It is formed from:

• proveriti = infinitive
• ću = first person singular future auxiliary

When ću comes after the infinitive, Serbian normally drops -ti and joins the forms:

• proveriti + ću → proveriću

So Proveriću sistem is the compact future form.

A different standard version is:

• Ja ću proveriti sistem.

But standard Serbian does not use proveriti ću.

Because Serbian has two common ways to express this future form:

• Ja ću proveriti sistem.
• Proveriću sistem.

When the future auxiliary comes after the infinitive, it attaches to it in writing, and the final -ti is dropped.

So:

• proveriti + ću becomes proveriću

This is very common and completely natural.

Yes, it matters.

Proveriti is a perfective verb. That means it presents the action as a completed whole: to check something and finish checking it.

So Proveriću sistem suggests:

• I will check the system
• I will complete that check

If you wanted an ongoing or repeated sense, Serbian would usually use an imperfective verb such as proveravati:

• Proveravaću sistem. = I will be checking the system / I will check it repeatedly

So the sentence with proveriću sounds like a single completed future action.

Sistem is the direct object, so it is in the accusative case.

However, for many masculine inanimate singular nouns, the accusative looks exactly the same as the nominative.

So:

• nominative: sistem
• accusative: sistem

That is why the form does not change.

If the noun were a different gender or type, the object form might look different.

A simple approximation is:

• pro-ve-ri-ću si-stem

A few pronunciation notes:

• ć is a soft Serbian sound that English does not have exactly.
• It is softer than č.
• English speakers can approximate it with a very soft ch sound, though that is not perfect.
• The r in Serbian is usually tapped or lightly rolled.
• i is pronounced like ee in see.

So sistem sounds roughly like SEE-stem, not like English system.

Yes. Serbian word order is more flexible than English.

The neutral version is:

• Proveriću sistem.

But you can change the order for emphasis:

• Ja ću proveriti sistem. = emphasizes I
• Sistem ću proveriti. = emphasizes the system

However, the future auxiliary ću behaves like a clitic, so its placement is restricted. You cannot move it completely freely.

For a learner, the safest patterns are:

• Proveriću sistem
• Ja ću proveriti sistem
• Sistem ću proveriti

For the negative, you usually use neću:

• Neću proveriti sistem. = I will not check the system.

For a yes/no question, common options are:

• Da li ću proveriti sistem?
• Hoću li proveriti sistem?

In everyday speech, intonation can also make it a question, but the two forms above are clearer for learners.