Ako ideš brže, stići ćemo na vrijeme.

In Croatian, a normal real future condition is often built like this:

• Ako + present tense
• future tense in the main clause

So Ako ideš brže, stići ćemo na vrijeme is the standard pattern for If you go faster, we'll arrive on time.

Croatian does not usually put a future form after ako in a simple sentence like this.

Ideš is:

• 2nd person singular
• present tense
• of the verb ići = to go

So it means you go / you are going, depending on context.

In this sentence, it is addressing one person informally.

Croatian often leaves out subject pronouns because the verb endings already show who the subject is.

• ideš = you go
• ćemo = we will

So Croatian does not need ti for you or mi for we unless you want emphasis or contrast.

For example:

• Ako ti ideš brže, mi ćemo stići na vrijeme.

This sounds more emphatic, like If you go faster, we will arrive on time.

Because brže means faster, while brzo means fast.

Here you are comparing one speed to another, so Croatian uses the comparative form:

• brz = fast
• brzo = fast, quickly
• brže = faster, more quickly

Since it modifies the verb ideš, it is functioning like an adverb: go faster.

Stići ćemo means we will arrive, we will get there, or we will make it.

It is the future tense of stići.

The future is formed with:

• the infinitive stići
• plus the clitic future auxiliary ćemo = we will

So:

• stići ćemo = we will arrive

In Croatian, the future auxiliary is usually written separately from the infinitive, so stići ćemo is normal.

A useful detail:

• with infinitives ending in -ći, the form stays like this: stići ćemo
• with many infinitives ending in -ti, the final -i drops before the auxiliary:
  • raditi → radit ćemo

So stići ćemo is the correct standard form here.

Because stići does not simply mean to go. It means something like:

• to arrive
• to reach
• to make it

In this sentence, the idea is not just movement, but successful arrival by a certain time.

That is why stići na vrijeme is a very common combination: it means to arrive on time / make it on time.

Na vrijeme is a fixed expression meaning on time or in time.

Here, na takes the accusative case:

• vrijeme is accusative singular here

But vrijeme is a neuter noun, and in the singular its nominative and accusative forms look the same, so you still see vrijeme.

Also, na vrijeme is idiomatic. You usually cannot replace it with u vrijeme if you mean on time.

• na vrijeme = on time / in time
• u vrijeme = at a time, during a period, in an era

Because the ako clause comes first:

• Ako ideš brže, stići ćemo na vrijeme.

In Croatian, when a subordinate clause like this comes before the main clause, a comma is normally used.

If you reverse the order, you would usually write:

• Stići ćemo na vrijeme ako ideš brže.

Normally, there is no comma there.

Yes. Croatian word order is more flexible than English.

These are both natural:

• Ako ideš brže, stići ćemo na vrijeme.
• Stići ćemo na vrijeme ako ideš brže.

The meaning stays basically the same. The difference is mostly about emphasis and information flow.

Croatian also moves clitics according to word-order rules, so not every rearrangement is equally natural, but these two versions are both standard.

They express two different parts of the situation:

• ići = the process of going
• stići = the result, arriving

This also matches Croatian aspect well:

• ići is imperfective: it describes ongoing movement
• stići is perfective: it describes reaching the endpoint

So the sentence naturally says:

• If you go faster → process
• we’ll arrive on time → completed result

Then ideš would become idete.

So you would say:

• Ako idete brže, stići ćemo na vrijeme.

This can mean either:

• If you all go faster, we'll arrive on time
• If you go faster, we'll arrive on time when speaking formally to one person

Croatian uses the same 2nd person plural form for both plural you and formal singular you.