Mama kazała dzieciom pilnować chomika, kiedy sprzątała pokój.

Polish often uses kazać + someone in the dative + infinitive to mean to tell/order someone to do something.

So:

• Mama kazała dzieciom pilnować chomika = Mom told the children to watch the hamster

The pattern is:

• kazać + komu? + infinitive
• komu? = the person receiving the order, in the dative case

You can also make similar sentences with żeby, but kazać + infinitive is very common and natural here.

For example:

• Kazała mi czekać. = She told me to wait.
• Kazał im wyjść. = He told them to leave.

Because dzieciom is the dative form of dzieci.

With kazać, Polish uses the pattern:

• kazać komuś coś zrobić = to tell someone to do something

So here:

• dzieciom = to the children

Compare:

• dzieci = children
• dzieciom = to the children

A native English speaker often expects the person after told to look like a direct object, but in Polish this verb requires the dative, not the accusative.

Because chomika is the accusative singular form of chomik.

Here, chomik is the direct object of pilnować:

• pilnować kogo? czego? is often taught with genitive-style questions, but in many learner contexts it is easiest first to notice that animate masculine nouns often show -a in object-like positions.

More importantly for this sentence, chomik is a masculine animate noun, and masculine animate nouns often have:

• nominative: chomik
• accusative: chomika

So:

• Widzę chomika. = I see the hamster.
• Pilnuję chomika. = I am watching the hamster.

This -a ending is very common with masculine animate nouns.

Because Polish past tense agrees with the subject in gender and number.

The verb sprzątała means was cleaning / cleaned, and the -ła ending shows that the subject is:

• singular
• feminine

Since Mama is feminine, sprzątała matches it.

Compare:

• sprzątał = he was cleaning
• sprzątała = she was cleaning
• sprzątali = they were cleaning (mixed group or all male)
• sprzątały = they were cleaning (all female or non-masculine-personal group)

The most natural interpretation is that the mother was cleaning the room.

That is because:

• the main subject is Mama
• the verb in the subordinate clause is sprzątała, which is singular feminine
• this matches Mama

So the sentence is normally understood as:

• Mom told the children to watch the hamster while she was cleaning the room

If the children were cleaning, the sentence would need different grammar, for example a plural verb.

In this sentence, it most naturally means while she was cleaning the room.

Why?

Because sprzątała is imperfective past, which often describes:

• an ongoing action
• background action
• something in progress

So the sense is:

• Mom told the children to watch the hamster while she was cleaning the room

Although kiedy often translates as when, in real usage it can introduce a time clause that English would naturally express as while.

Because the sentence describes an action as ongoing background activity.

• sprzątać = imperfective, to clean / be cleaning
• posprzątać = perfective, to clean up / finish cleaning

Here, the mother gave the instruction during the time that the cleaning was happening. That makes the imperfective form very natural:

• kiedy sprzątała pokój = while she was cleaning the room

If you used a perfective form, the meaning would shift more toward a completed event, which does not fit as well with the idea of the children watching the hamster during that time.

Because pokój is the accusative singular form here, used as the direct object of sprzątać.

• sprzątać pokój = to clean the room

For this noun:

• nominative: pokój
• accusative: pokój
• genitive: pokoju

Since pokój is an inanimate masculine noun, its accusative singular is the same as its nominative singular.

So:

• To jest pokój. = This is a room.
• Sprzątała pokój. = She was cleaning the room.

Yes, pilnować is a very natural verb here.

It means things like:

• to watch
• to keep an eye on
• to look after
• to make sure something stays safe or under control

So in this sentence, the idea is not just look at the hamster, but rather:

• make sure the hamster is okay
• keep it from escaping or getting into trouble

That is why pilnować works well.

It is different from:

• patrzeć na = to look at
• oglądać = to watch, for example a film
• opiekować się = to take care of

Yes, but the meaning changes a little.

• pilnować chomika = watch the hamster, keep an eye on it
• opiekować się chomikiem = take care of the hamster

Pilnować focuses more on supervision. Opiekować się suggests broader care and responsibility.

Also notice the grammar difference:

• pilnować chomika
• opiekować się chomikiem

With opiekować się, you need the instrumental case:

• chomikiem

So both are possible in the right context, but pilnować fits especially well if the mother wants the children to make sure the hamster does not escape while she is busy.

Yes. Polish word order is more flexible than English word order.

The basic sentence:

• Mama kazała dzieciom pilnować chomika, kiedy sprzątała pokój.

But you could also hear variations such as:

• Mama dzieciom kazała pilnować chomika, kiedy sprzątała pokój.
• Kiedy sprzątała pokój, mama kazała dzieciom pilnować chomika.

These versions are still grammatical, but the emphasis changes slightly.

In neutral speech, the original order sounds very natural.

Because kiedy sprzątała pokój is a subordinate clause.

In Polish, subordinate clauses are normally separated with a comma, including clauses introduced by words like:

• kiedy = when
• że = that
• bo = because
• jeśli = if

So the comma is standard punctuation here.

Not exactly.

• mama is like mom / mum
• matka is more like mother

So Mama kazała... sounds natural, everyday, and family-based.

A Polish learner should know that mama is warm and ordinary, not unusually childish in a sentence like this.

In this sentence:

• pokój is accusative singular
• chomika is also functioning as the object form, and for this masculine animate noun that form is chomika

A useful learner shortcut is:

• masculine animate nouns often change in the accusative: chomik → chomika
• masculine inanimate nouns often do not: pokój → pokój

So the two object nouns behave differently because one is animate and the other is inanimate.

Yes, in some contexts that is a possible English translation.

• kazała dzieciom pilnować chomika can mean:
  • told the children to watch the hamster
  • made the children watch the hamster
  • had the children watch the hamster

Which English version sounds best depends on tone.

Usually, told the children to watch the hamster is the safest and most natural translation for learners, but the Polish verb kazać can be stronger than simple ask. It often implies instruction, command, or authority.