Czy możesz przyjść dziś wieczorem i nakarmić rybki, jeśli wrócę bardzo późno z pracy?

Czy is a yes/no question marker. It does not have a direct English equivalent, but it helps signal that the sentence is a question.

So:

• Czy możesz...? = Can you...?

You can sometimes leave czy out in everyday speech:

• Możesz przyjść dziś wieczorem...?

That is still correct, but czy makes the question feel more explicitly marked and a bit more standard.

Polish usually drops subject pronouns because the verb endings already show who is doing the action.

In this sentence:

• możesz = you can
• wrócę = I will come back

So ty and ja are unnecessary unless you want extra emphasis or contrast.

For example:

• Czy ty możesz przyjść...? adds emphasis to you
• jeśli ja wrócę... emphasizes I

Without that emphasis, leaving the pronouns out is the normal choice.

This is about aspect.

• przyjść is perfective
• nakarmić is perfective

Perfective verbs are used here because the speaker is asking about two single, complete actions:

• coming over once
• feeding the fish once

If you used imperfective verbs:

• przychodzić
• karmić

it would sound more like a repeated, habitual, or ongoing action, which does not fit this situation as well.

Also, nakarmić specifically means to feed so that the feeding is completed. It is very natural when talking about giving pets their meal one time.

Dziś wieczorem means this evening or tonight.

The word wieczorem is an adverbial form built from wieczór. In practice, you should learn wieczorem as a set expression meaning in the evening.

So:

• dziś = today
• wieczorem = in the evening

Together:

• dziś wieczorem = this evening / tonight

You can also say dzisiaj wieczorem. Both are correct. Dziś is just a bit shorter.

Rybki is the plural of rybka, a diminutive form meaning little fish or simply pet fish.

This is very natural when talking about aquarium fish. It can sound:

• affectionate
• everyday
• more specific to household pets

Ryby is also possible, but it sounds more general and less personal.

Grammatically, rybki here is the direct object of nakarmić, so it is in the accusative plural. For this type of noun, the accusative plural looks the same as the nominative plural, so the form stays rybki.

Wrócę means I will come back.

It comes from the perfective verb wrócić. In Polish, perfective verbs use present-tense endings, but their meaning is future.

So:

• wracam = I am coming back / I come back
• wrócę = I will come back

After jeśli, Polish can use this future-meaning perfective form naturally:

• jeśli wrócę bardzo późno = if I come back very late

This is different from English, where we normally say if I come back, not if I will come back.

Z pracy means from work.

The preposition z often means from or out of, and it requires the genitive case.

The noun is:

• praca = work

In the genitive singular, it becomes:

• pracy

So:

• wrócić z pracy = to come back from work

This is a very common phrase in Polish.

Because jeśli wrócę bardzo późno z pracy is a subordinate clause, and in Polish subordinate clauses are normally separated by commas.

So the comma before jeśli is required here.

Compare:

• Czy możesz przyjść dziś wieczorem i nakarmić rybki, jeśli wrócę bardzo późno z pracy?

If the jeśli clause came first, you would still use a comma:

• Jeśli wrócę bardzo późno z pracy, czy możesz przyjść dziś wieczorem i nakarmić rybki?

No, Polish word order is fairly flexible. The version in the sentence sounds natural and neutral, but some parts can move depending on emphasis.

For example, you could also say:

• Czy możesz dziś wieczorem przyjść i nakarmić rybki, jeśli wrócę bardzo późno z pracy?

That still sounds natural.

What changes with word order is usually emphasis, rhythm, or style, not the core meaning. The original sentence is a very normal way to say it.

Czy możesz...? is normal and polite enough in many everyday situations, especially with someone you know.

It is basically like Can you...?

If you want to sound softer or more indirect, Polish often uses:

• Czy mógłbyś...? when speaking to a man informally
• Czy mogłabyś...? when speaking to a woman informally
• Czy mógłby Pan...? / Czy mogłaby Pani...? in formal speech

Those are closer to Could you...?

So the sentence is fine as it is, but there are softer alternatives depending on the relationship and level of politeness.

Because późno means late, while później means later.

Here the speaker means:

• I return at a very late time

So Polish uses:

• bardzo późno = very late

If you said później, that would suggest comparison:

• later than usual
• later than someone else
• later than another time

That is not the main idea in this sentence.

Yes. Both infinitives depend on możesz.

The structure is:

• możesz przyjść
• i nakarmić rybki

So the full sense is:

• Can you come over and feed the fish...?

Polish often uses one modal verb with two infinitives linked by i:

• Mogę wejść i usiąść? = Can I come in and sit down?
• Muszę zadzwonić i wszystko wyjaśnić. = I have to call and explain everything.

So this structure is completely normal.