Zatímco moje maminka připravuje kuře na pánvi, já vařím těstoviny a sestra dělá omáčku.

Here zatímco means while and introduces an action happening at the same time as another action.

It can also mean whereas in some contexts, when contrasting two things, but in this sentence the main idea is simultaneity:

• Zatímco moje maminka připravuje kuře...
• While my mother is preparing the chicken...

Because zatímco introduces a subordinate clause, and Czech separates that clause from the main clause with a comma.

So the structure is:

• Zatímco moje maminka připravuje kuře na pánvi, = subordinate clause
• já vařím těstoviny a sestra dělá omáčku. = main clause

This is very normal Czech punctuation.

That is true: Czech often leaves out subject pronouns because the verb ending already shows the person.

So vařím těstoviny already means I am cooking pasta.

Here já is included for contrast and clarity:

• my mother is doing one thing
• I am doing another
• my sister is doing another

So já sounds natural because it helps set up that contrast. If you removed it, the sentence would still be grammatical.

Yes, moje maminka and má maminka are both possible.

Very roughly:

• moje maminka = common and natural in everyday speech
• má maminka = also correct, but can sound a bit shorter, sometimes slightly more formal or literary depending on context

Learners also notice that má is identical in form to the verb has, but in a sentence like this the meaning is clear from context.

Maminka is an affectionate, warm family word.

Compare:

• matka = mother, more formal or neutral, sometimes a bit clinical
• máma = mom, everyday and informal
• maminka = mom / mommy, affectionate and warm

So moje maminka gives the sentence a friendly, family-home feeling.

Because Czech often leaves out possessives when they are obvious from context, especially with family members.

After moje maminka and já, it is natural to understand sestra as my sister.

So:

• sestra dělá omáčku = my sister is making the sauce

If you said moje sestra, it would also be correct, but slightly more explicit.

This is one of those places where Czech and English use different prepositions.

Czech commonly says na pánvi for cooking in/on a pan.

Also, pánvi is in the locative case because na here expresses location:

• na pánvi = on/in the pan

Compare:

• na pánvi = in the pan, on the pan surface, already there
• na pánev = onto the pan, movement toward it

So the case changes depending on whether the meaning is location or direction.

Kuře is the direct object of připravuje, so it is in the accusative singular.

It does not visibly change because for this noun, the nominative and accusative singular are the same:

• nominative: kuře
• accusative: kuře

This is a neuter noun. In other cases, you can see the stem change more clearly:

• bez kuřete = without the chicken
• ke kuřeti = toward the chicken

So even though the form stays kuře here, the case is still accusative.

In Czech, těstoviny is normally used as a plural noun.

So Czech thinks of it more like:

• pasta pieces / noodles / pasta types

That is why you say:

• vařím těstoviny = I am cooking pasta

This is completely normal Czech usage. English and Czech simply package the idea differently.

Because omáčku is the accusative singular form of omáčka.

It is the direct object of dělá:

• omáčka = nominative, dictionary form
• omáčku = accusative, used for the thing being made

This is a very common pattern for feminine nouns ending in -a:

• polévka → polévku
• káva → kávu
• omáčka → omáčku

Because they describe slightly different kinds of food preparation.

• připravuje kuře = is preparing the chicken
  A broad verb: getting it ready, cooking it, handling it in some way

• vařím těstoviny = I am cooking / boiling pasta
  This is the normal verb for cooking food, and very often specifically boiling

• dělá omáčku = is making the sauce
  dělat literally means to do / to make, and in everyday Czech it is very natural for food too

So Czech is not repeating one general verb; it is choosing the most natural verb for each item.

Czech does not have a separate tense built like English am/is/are + -ing.

Instead, Czech very often uses the present tense to express both:

• general present
• ongoing present

So:

• připravuje
• vařím
• dělá

can all mean is preparing / am cooking / is making, depending on context.

Here the context clearly shows ongoing actions happening at the same time, so the English translation naturally uses the continuous form.

Yes, these are imperfective verbs, which is exactly what you would expect here.

They present the actions as:

• ongoing
• in progress
• not viewed as completed

That fits a sentence describing several simultaneous activities in the kitchen.

Compare the basic idea:

• imperfective = the action is unfolding
• perfective = the action is seen as completed or as a whole event

Because the sentence is about what everyone is doing at the moment, imperfective is the natural choice.

Yes. Czech word order is relatively flexible, because case endings help show what is subject and object.

This sentence uses a very natural, neutral order. But other versions are possible, for example:

• Zatímco moje maminka připravuje na pánvi kuře, vařím těstoviny a sestra dělá omáčku.
• Já vařím těstoviny, zatímco moje maminka připravuje kuře na pánvi a sestra dělá omáčku.

The basic meaning stays similar, but the emphasis changes.

So Czech word order is not random, but it is more flexible than English.

Czech has no articles, so there is no direct equivalent of English a, an, or the.

That means:

• kuře can mean a chicken or the chicken
• omáčku can mean a sauce or the sauce

The exact meaning comes from context.

This is normal in Czech, and learners usually get used to it quickly once they stop expecting an article before every noun.