Pre nego što platim ratu, tražim ispravku.

Pre nego što means before when it is followed by a full clause, meaning a subject + verb idea, such as platim ratu.

So:

• pre nego što platim ratu = before I pay the installment
• pre plaćanja rate = before the payment of the installment / before paying the installment

Use pre by itself before a noun or noun phrase. Use pre nego što before a verb clause.

Because pre nego što is a standard conjunction in Serbian meaning before.

It is best learned as one unit:

• pre nego što + verb clause

In this sentence, što is expected because what follows is a full clause: platim ratu. A learner should usually treat pre nego što as a fixed expression, rather than trying to translate each word separately.

Because platim comes from the perfective verb platiti, which focuses on a single completed act: to pay off / to make the payment.

Compare:

• platim = I pay, in the sense of completing the payment
• plaćam = I am paying / I pay regularly / I pay in general

After pre nego što, Serbian often uses a perfective verb when talking about an action that will be completed at that point in time. So pre nego što platim ratu means before I make that payment.

Yes, it is morphologically a present-tense form, but in Serbian, a present form can refer to the future in subordinate clauses after time expressions like this.

This is very similar to English:

• Before I pay, ... not
• Before I will pay, ...

So pre nego što platim ratu is a normal Serbian way to say before I pay the installment.

Because ratu is the accusative singular form of rata, meaning installment.

The verb platiti takes a direct object, and that object goes in the accusative case.

So:

• nominative: rata
• accusative: ratu

That is why the sentence has platim ratu.

Here it means request or ask for.

The verb tražiti can mean different things depending on context:

• look for / search for
• ask for
• request
• sometimes even demand

In tražim ispravku, the meaning is I ask for / request a correction.

Because ispravku is also in the accusative case.

The noun is ispravka in the nominative, but after tražim it becomes the direct object, so it changes to accusative:

• nominative: ispravka
• accusative: ispravku

So:

• ispravka = a correction
• tražim ispravku = I request a correction

Out of context, it often sounds like a habitual or usual action:

• Before I pay an installment, I request a correction.

That is because tražim is in the present tense and can describe what someone generally does.

If you wanted to make it clearly about one future occasion, Serbian would often use a future form, for example:

• Pre nego što platim ratu, tražiću ispravku.
• Pre nego što platim ratu, zatražiću ispravku.

So the original sentence most naturally sounds like a general practice or repeated behavior.

Yes. Serbian word order is fairly flexible.

You can also say:

• Tražim ispravku pre nego što platim ratu.

That means the same basic thing. The original version starts with the time clause, which sets the scene first. Putting tražim ispravku first makes the main action feel more central.

So the word order can change, but the cases and verb forms still show the grammatical relationships.

Because Serbian does not have articles like English a and the.

So ratu can mean:

• an installment
• the installment

And ispravku can mean:

• a correction
• the correction

Which meaning is intended depends on context, not on a separate article word.