Wieczorem pytam córkę, czy nocnik stoi jeszcze w łazience.

Yes. Wieczorem means in the evening / during the evening.

In this sentence, it works as an adverbial expression of time. Polish often uses wieczorem, rano, nocą, etc. without a preposition where English would use in the evening, in the morning, and so on.

So:

• Wieczorem pytam córkę... = In the evening I ask my daughter...

You do not need w here. Saying w wieczór would not fit this meaning.

Pytam is the 1st person singular present tense of pytać = to ask.

So:

• pytam = I ask / I am asking

Why this form?

1. pytać is the basic imperfective verb for to ask
2. The sentence is presented in the present tense
3. Polish often uses the simple present where English might say either I ask or I’m asking, depending on context

Related forms:

• zapytam = I will ask or perfective future
• zapytałem = I asked (past, masculine speaker)
• pytam się also exists in speech, but pytam is cleaner and more standard here

So pytam is the natural choice for I ask in this sentence.

Because córkę is the accusative form, and córka is the nominative form.

In this sentence, córkę is the direct object of pytam:

• pytam kogo? = I ask whom?
• córkę = daughter in the accusative

Forms:

• córka = daughter (subject form)
• córkę = daughter (direct object form)

Compare:

• Córka stoi w łazience. = The daughter is standing in the bathroom.
  Here córka is the subject.
• Pytam córkę. = I ask my daughter.
  Here córkę is the object.

Here czy introduces an indirect yes/no question. In English, this is usually whether or sometimes if.

So:

• pytam córkę, czy... = I ask my daughter whether...

This czy does not mean or here. It is the question-linking czy.

Examples:

• Nie wiem, czy przyjdzie. = I don’t know whether he’ll come.
• Zapytaj, czy to prawda. = Ask whether it’s true.

So in your sentence, czy introduces what is being asked.

Polish often prefers a verb of position where English just uses is.

So:

• stoi = stands / is standing
• nocnik stoi w łazience literally = the potty is standing in the bathroom

In natural English, you would usually translate this simply as:

• the potty is in the bathroom
• or the potty is still in the bathroom

But in Polish, using stać for an upright object is very normal.

Common position verbs:

• stać = to stand
• leżeć = to lie
• wisieć = to hang
• siedzieć = to sit

So Polish is often more specific about how something is positioned.

Jest w łazience is also possible, but stoi w łazience sounds more concrete and natural if the object is thought of as standing there.

Here jeszcze means still.

So:

• czy nocnik stoi jeszcze w łazience = whether the potty is still in the bathroom

It suggests that the speaker expects the object may already have been moved, removed, or no longer be there.

Jeszcze can have several meanings depending on context, including:

• still
• yet
• more / another

But in this sentence, still is the best match.

Because w meaning in for location requires the locative case.

So:

• łazienka = nominative
• w łazience = locative, meaning in the bathroom

This is location, not motion.

Compare:

• nocnik stoi w łazience = the potty is in the bathroom
  location → locative
• wkładam nocnik w łazienkę would mean motion into the bathroom
  direction/motion → often accusative

Also note the stem change:

• łazienka → łazience

That kind of change is normal in Polish declension.

Because in Polish, a subordinate clause introduced by czy is normally separated by a comma.

The sentence has two parts:

1. Wieczorem pytam córkę
2. czy nocnik stoi jeszcze w łazience

The second part depends on the first, so it is a subordinate clause.

Polish punctuation is generally stricter than English here. Even when English might omit punctuation in some contexts, Polish usually keeps the comma.

So the comma before czy is standard and correct.

The word order is flexible, though the original version is very natural.

Original:

• Wieczorem pytam córkę, czy nocnik stoi jeszcze w łazience.

Possible variations:

• Pytam wieczorem córkę, czy nocnik stoi jeszcze w łazience.
• Córkę pytam wieczorem, czy nocnik stoi jeszcze w łazience.
• Wieczorem pytam córkę, czy jeszcze nocnik stoi w łazience.
  This is possible, but less neutral.

Why choose the original order?

• Wieczorem sets the time first
• pytam córkę gives the main action
• czy... introduces the content of the question

So the original sounds neutral and well-structured.

Polish often leaves out possessives like my, your, his, etc. when the meaning is obvious from context.

So:

• pytam córkę very naturally means I ask my daughter
• not necessarily a daughter

Because if you say I ask daughter in this kind of context, it is usually understood as my daughter.

You could say:

• pytam moją córkę

But that adds emphasis or specificity. In many everyday situations, it sounds unnecessary.

This is very common in Polish with family members and body parts.

Yes, in many English translations it can be.

So:

• pytam córkę, czy nocnik stoi jeszcze w łazience
• = I ask my daughter if the potty is still in the bathroom
• = I ask my daughter whether the potty is still in the bathroom

However, whether is often the more precise match for Polish czy in grammar explanations, because it introduces an indirect yes/no question.

So both work in English, but whether is often the safest teaching translation.

Yes. Stoi is present tense, 3rd person singular, from stać.

So:

• ja stoję = I stand
• ty stoisz = you stand
• on / ona / ono stoi = he / she / it stands

Here the subject is nocnik:

• nocnik stoi = the potty stands / is standing

Since nocnik is singular, stoi must also be singular.

Usually nocnik means potty / chamber pot. In modern everyday family context, it most often refers to a child’s potty.

So in this sentence, that is almost certainly the intended meaning.

Depending on context, historically it could also mean a chamber pot, but for most learners and most modern situations, potty is the right understanding.