Если мы выйдем сейчас, мы успеем купить билеты на поезд.

This is a very common question. Russian and English work differently here.

In Russian, if the condition is about the future, the если clause normally also uses a future form:

• Если мы выйдем сейчас, мы успеем...

Both выйдем and успеем refer to future actions.

In English, future meaning after if is usually expressed with a present form:

• If we leave now, we’ll have time...

So this is something you should get used to: Russian often uses future forms in both parts of a real future condition.

Выйдем is the 1st person plural future of выйти.

Literally, выйти means to go out or to come out, but in many contexts it also means to leave or to head out.

So here:

• Если мы выйдем сейчас...
  = If we leave now... = If we head out now...

It does not necessarily mean only step outside a building. In this sentence, it has the broader sense of leaving now in order to go somewhere.

Because выйти is a perfective verb.

Perfective verbs in Russian usually form the future with a simple form:

• выйти → выйду, выйдешь, выйдем...

That simple future means a single completed action: to leave / to set off.

If you used an imperfective future like будем выходить, it would usually suggest a process or repeated action, which does not fit this situation well. Here the idea is one definite act:

• we leave now
• not we will be in the process of leaving

Успеем купить means something like:

• we’ll manage to buy
• we’ll have time to buy
• we’ll make it in time to buy

The verb успеть is very common in Russian. It means to be in time, to manage, or to succeed in doing something before it is too late.

Structure:

• успеть + infinitive

So:

• успеем купить билеты
  = we’ll manage to buy the tickets / we’ll have time to buy the tickets

It is not about skill; it is about timing.

Because the speaker is talking about one completed result: the tickets get bought.

• купить = perfective, to buy as a completed action
• покупать = imperfective, to buy / be buying, focusing on process or repeated action

Here the important idea is the result:

• if we leave now, we will succeed in buying the tickets

So купить is the natural choice.

Most likely because мы means we, so the speaker is talking about buying more than one ticket.

• билеты = tickets
• билет = ticket

So the sentence suggests something like:

• one ticket for each person
• or multiple tickets in general

Grammatically, билеты here is the accusative plural. Because билет is inanimate, its accusative plural looks the same as the nominative plural.

This is a standard Russian pattern:

• билет на поезд = a ticket for the train
• билет на автобус = a ticket for the bus
• билет на концерт = a ticket for the concert

So after билет / билеты, Russian often uses на + accusative to mean for.

Here:

• на поезд does not mean physical movement onto the train
• it means for the train

This is just the normal expression you need to learn as a set phrase.

It is in the accusative singular:

• на поезд

The pattern is:

• билет на что?
• на поезд

Since поезд is masculine and inanimate, the accusative singular looks the same as the nominative singular:

• nominative: поезд
• accusative: поезд

So the form does not change, even though the case is accusative.

No, it is not strictly necessary.

Russian often drops subject pronouns when the verb ending already makes the subject clear. So you could also say:

• Если выйдем сейчас, успеем купить билеты на поезд.

That sounds natural too.

Repeating мы can make the sentence a bit clearer, more balanced, or slightly more emphatic:

• Если мы выйдем сейчас, мы успеем...

So both versions are possible.

Yes. Russian word order is flexible, and changes in word order often affect emphasis more than basic meaning.

For example:

• Если мы выйдем сейчас, мы успеем купить билеты на поезд.
• Если сейчас выйдем, успеем купить билеты на поезд.
• Мы успеем купить билеты на поезд, если выйдем сейчас.

All of these can work.

The original sentence is neutral and natural. Putting сейчас earlier can emphasize now, and moving the main clause first can emphasize the result: we’ll make it.

Because если means if, so it expresses a condition:

• If we leave now, we’ll have time...

The idea is that leaving now is a condition for succeeding.

If you used когда, the meaning would shift toward when:

• Когда мы выйдем сейчас... would not sound right here
• Когда мы выйдем, мы успеем... would suggest the leaving is expected to happen, not just conditional

So если is the correct word for this sentence because the speaker is talking about a possibility and its result.

It can mean both, depending on context.

In this sentence, сейчас has a fairly urgent feel:

• If we leave now / right now, we’ll have time...

So in natural English, right now may capture the tone well, but plain now is also correct.

The point is that the timing matters: leaving at this moment will make the difference.