Až bude všechno hotové, moje dcera položí na koberec polštář a bude si tam číst.

Až is very common when English uses when to talk about a future point:

• Až bude všechno hotové... = When/Once everything is finished...

For a learner, a helpful contrast is:

• když = often when in general, repeated situations, or past contexts
• až = when/once at a specific future moment

So here až sounds natural because the sentence is about something that will happen later, after another future event is completed.

Because Czech normally uses the future here.

In English, after when, we usually use the present:

• When everything is ready, ...

But Czech does not usually do that in this kind of sentence. It says:

• až bude všechno hotové

So a very important difference is:

• English: when + present
• Czech: až + future

That is why bude is correct here.

Hotové is an adjective meaning finished / ready / done, and it agrees with všechno.

Here:

• všechno = everything
• grammatically, všechno behaves like neuter singular
• so the adjective also appears in neuter singular: hotové

That is why you get:

• všechno je hotové
• všechno bude hotové

So hotové is basically the predicate adjective: everything will be finished/ready.

In Czech, všechno is grammatically singular neuter, even though it refers to many things together.

That affects agreement:

• všechno bude... not budou
• všechno hotové not a plural adjective form

So even though the meaning is collective, the grammar is singular.

Because položit is a perfective verb, and here it describes a single completed action:

• položí polštář = she will put/place the pillow down

In Czech, perfective verbs often use a present-looking form to express the future:

• položí = future meaning, not present meaning

Compare:

• pokládá = she is placing / she places habitually
• bude pokládat = she will be placing / will place repeatedly or in a more process-focused way
• položí = she will place it once, as a completed act

This sentence wants the simple one-time action, so položí is the natural choice.

This is one of the most important Czech aspect patterns.

With perfective verbs, the present-tense form usually has future meaning.

So:

• položit = perfective
• položí = she will put/place

A true present meaning is generally not possible with a perfective verb, because a perfective verb describes a completed whole, not an action happening right now.

So in context:

• moje dcera položí... = my daughter will place...

Because Czech distinguishes between:

• motion onto a surface → na + accusative
• location on a surface → na + locative

Here the pillow is being moved onto the rug:

• položí na koberec polštář = she will put the pillow onto the rug

Compare:

• Polštář je na koberci. = The pillow is on the rug.
• Položí polštář na koberec. = She will put the pillow onto the rug.

This is a very common Czech case contrast after prepositions.

Polštář is the direct object, so it is in the accusative. But for many inanimate masculine nouns in Czech, the accusative singular is the same as the nominative singular.

So:

• nominative: polštář
• accusative: polštář

That is why the form does not visibly change.

If it were an animate masculine noun, you would often see a different accusative form.

Because číst is an imperfective verb.

Imperfective verbs form the future with:

• budu / budeš / bude / budeme / budete / budou + infinitive

So:

• bude si číst = she will be reading / she will read

This is different from perfective verbs like položit, which use present forms with future meaning:

• položí
• but bude číst

So the sentence nicely shows both future patterns:

• položí = perfective future
• bude si číst = imperfective future

Si is the reflexive dative particle. With číst, it often gives the sense of reading for oneself / enjoying reading / sitting and reading.

So:

• bude číst = she will read
• bude si číst = she will read, usually with a more natural sense of sit and read / read to herself / enjoy some reading

In many everyday contexts, číst si is simply the idiomatic way to say someone is reading for pleasure or occupying themselves by reading.

It does not mean she is reading herself. It is more like reading to herself / doing some reading.

Tam means there. In this sentence, it most naturally refers to the place just mentioned, meaning there on the rug / in that spot.

So the sequence is:

1. she puts a pillow on the rug
2. she reads there

Czech often uses tam even when English might simply leave it out or say there only if it needs emphasis.

A more explicit version could be something like:

• ...a bude si na něm číst. = ...and she will read on it.

But tam is perfectly natural and simple.

Because Až bude všechno hotové is a subordinate clause, and in Czech subordinate clauses are normally separated by a comma.

So the structure is:

• Až bude všechno hotové, = dependent clause
• moje dcera položí... = main clause

This comma is standard Czech punctuation.

The word order is not completely fixed. Czech word order is flexible, and changes usually affect emphasis, not the basic meaning.

Neutral version:

• Až bude všechno hotové, moje dcera položí na koberec polštář a bude si tam číst.

Other possible versions:

• Až bude všechno hotové, moje dcera položí polštář na koberec a bude si tam číst.
• Až bude všechno hotové, moje dcera si tam bude číst.
• Polštář moje dcera položí na koberec... (more marked emphasis on polštář)

So the given order is natural, but not the only possible one.

Because the sentence describes a very natural sequence:

1. položí = a single completed action: she puts the pillow down
2. bude si číst = an activity that then continues for some time: she will read

Czech aspect is doing important work here:

• perfective for the one-time result: položí
• imperfective for the ongoing activity: bude si číst

So the grammar mirrors the real-life flow of events.

Yes. In this sentence, až can often be translated as:

• when
• once
• sometimes after, depending on style and context

So these are all reasonable English renderings of the first clause:

• When everything is finished...
• Once everything is ready...
• Once everything is done...

The Czech grammar stays the same; the different English versions just reflect slightly different natural phrasing.