Jeśli nie zdążymy do biletomatu, kupimy bilety później, kiedy wejdziemy do wagonu.

Polish often omits subject pronouns when the verb ending already makes the subject clear.

Here, the endings tell you that the subject is we:

• zdążymy = we will manage / we will make it in time
• kupimy = we will buy
• wejdziemy = we will enter / get in

So adding my would usually be unnecessary unless you want extra emphasis.

Zdążymy comes from zdążyć, which usually means:

• to manage to do something in time
• to make it in time
• sometimes to get somewhere before it is too late

So nie zdążymy do biletomatu does not just mean we will not hurry to the ticket machine. It means more like:

• we won’t make it to the ticket machine in time
• we won’t get to the ticket machine before we need to board

That idea of being in time for something is very important with zdążyć.

Because the preposition do takes the genitive case.

The base form is:

• biletomat = ticket machine

After do, it becomes:

• do biletomatu

In this sentence, do biletomatu means something like:

• to the ticket machine
• as far as the ticket machine
• in time to reach the ticket machine

With zdążyć, this combination is very natural: zdążyć do czegoś can mean to make it to something in time.

Both are in the genitive singular, because both follow the preposition do.

Base forms:

• biletomat
• wagon

After do:

• do biletomatu
• do wagonu

So this is a very useful pattern to remember:

• do + genitive

Examples:

• do domu = to the house / home
• do sklepu = to the shop
• do wagonu = into the carriage

Because kupić is a perfective verb, and Polish uses the simple future of perfective verbs.

• kupimy = we will buy

This sounds natural here because the action is seen as one complete event.

If you said będziemy kupować, that would use the imperfective verb kupować and would suggest:

• an ongoing process
• repeated action
• more focus on the act itself than on its completion

In this sentence, the idea is simple: we’ll buy the tickets later. So kupimy is the normal choice.

This is a very common question, because Polish and English work differently here.

In Polish, when you talk about a future event after words like kiedy or jeśli, you normally still use a future form:

• kiedy wejdziemy do wagonu

Literally, that looks like when we will enter the carriage, but in natural English we translate it simply as:

• when we get into the carriage
• when we board

So even though English avoids will in this type of clause, Polish does not.

Because wejść means to enter / to go in, and with that verb Polish normally uses do + genitive to show movement into something:

• wejść do wagonu = to enter the carriage

By contrast:

• w wagonie = in the carriage

So:

• wejdziemy do wagonu = we will get into the carriage
• będziemy w wagonie = we will be in the carriage

One expresses movement into, the other expresses location inside.

Yes. They come from perfective verbs:

• zdążyć
• kupić
• wejść

That matters because perfective verbs in Polish often describe:

• a single complete event
• an action viewed as reaching its result

That fits the sentence perfectly:

• zdążymy = manage in time or not
• kupimy = buy the tickets as a completed action
• wejdziemy = enter the carriage

This gives the whole sentence a clear sequence of complete future events.

Jeśli introduces a real or open condition:

• If we don’t make it to the ticket machine, we’ll buy the tickets later...

This means the speaker sees it as a normal possibility.

Gdyby would make the sentence more hypothetical and usually requires conditional forms:

• Gdybyśmy nie zdążyli do biletomatu, kupilibyśmy bilety później...

That sounds more like:

• If we didn’t make it to the ticket machine, we would buy the tickets later

So jeśli is the right choice for an ordinary future possibility.

Because Polish punctuation usually requires commas before subordinate clauses introduced by words like jeśli and kiedy.

So the commas separate the main parts of the sentence:

• Jeśli nie zdążymy do biletomatu, ...
• ..., kiedy wejdziemy do wagonu

In Polish, this is much more regular than in English. A native English speaker may feel tempted to use fewer commas, but in Polish these commas are standard.

Yes. Polish word order is fairly flexible, because grammatical roles are often shown by verb endings and case endings, not only by position.

The original sentence is natural and neutral:

• Jeśli nie zdążymy do biletomatu, kupimy bilety później, kiedy wejdziemy do wagonu.

But you could also say things like:

• Kupimy bilety później, jeśli nie zdążymy do biletomatu.
• Jeśli nie zdążymy do biletomatu, bilety kupimy później.

These versions change the emphasis a little, but the basic meaning stays the same.

In standard Polish, kiedy is the safest and most neutral word for when in a time clause like this:

• kiedy wejdziemy do wagonu

You may hear jak used as when in some informal speech, but it is not the best neutral choice here.

So for learners, a good rule is:

• use kiedy for when in time expressions
• use jak mainly for how or in other specific meanings

Yes. Biletomat is a common modern word for a machine that sells tickets, especially in public transport.

You may also see:

• automat biletowy

Both are used, but biletomat is very common in everyday speech and on city transport systems.

In this sentence, do biletomatu sounds natural and idiomatic.