Vadí ti, když večer poslouchám rádio v kuchyni?

Because vadit works differently from English to bother.

In Czech, the thing that is bothersome is the grammatical subject, and the person affected goes in the dative case.

So:

• vadí = it bothers / is bothersome
• ti = to you

Literally, Vadí ti, když... is something like Does it bother you if...

By contrast, Vadíš ty would mean You are bothering, which is a different structure.

Ti is the unstressed dative form of ty (you, singular/informal).

So:

• ty = you
• tobě = to you, for you (stressed/full form)
• ti = to you (short unstressed form)

In this sentence, ti means to you:

• Vadí ti... = Does it bother you...

You could also say Vadí tobě..., but that sounds more emphatic, as if contrasting with someone else.

Yes, když often means when, but after verbs like vadit it can also introduce a clause meaning if / when in English.

So:

• Vadí ti, když večer poslouchám rádio v kuchyni?

means something like:

• Does it bother you if I listen to the radio in the kitchen in the evening?

This use is very common in Czech. It does not always mean a specific when in time; it can introduce the situation that might bother someone.

In Czech, the present tense often covers what English expresses as:

• I listen
• I am listening
• sometimes even I will be listening, depending on context

Here poslouchám is imperfective present, which is natural for an ongoing or general activity like listening to the radio.

So když večer poslouchám rádio can mean:

• when/if I listen to the radio in the evening
• when/if I’m listening to the radio in the evening

English chooses between simple and progressive more often than Czech does.

Because rádio is the direct object of poslouchám, and for this noun the nominative and accusative forms are the same.

• rádio is a neuter noun
• after poslouchat you use the accusative
• but the accusative form is still rádio

So:

• poslouchám rádio = I listen to the radio

This is normal for many neuter nouns.

Because after v meaning in, Czech uses the locative case to show location.

• kuchyně = kitchen (dictionary form)
• v kuchyni = in the kitchen

So the noun changes because of the preposition:

• v kuchyni = location
• compare movement: do kuchyně = into/to the kitchen

This is a very common pattern:

• v domě = in the house
• v autě = in the car
• v kuchyni = in the kitchen

Czech often uses certain time expressions without a preposition.

Večer by itself commonly means:

• in the evening
• at nightfall / in the evening time

So:

• večer poslouchám rádio = I listen to the radio in the evening

This is just a normal adverbial time expression. Similar examples:

• ráno = in the morning
• odpoledne = in the afternoon
• večer = in the evening

So no preposition is needed here.

Not completely. Czech word order is more flexible than English, but the given order is very natural.

• Vadí ti, když večer poslouchám rádio v kuchyni?

This starts with the main question Does it bother you..., which is exactly what the speaker wants to ask first.

You could move things around for emphasis, but not all versions sound equally natural. For example:

• Vadí ti, když poslouchám večer rádio v kuchyni?
• Vadí ti, když v kuchyni večer poslouchám rádio?

These are possible, but the original is smooth and neutral.

Also, the short pronoun ti tends to appear early in the sentence, usually in second position, which is another reason the wording looks the way it does.

In Czech, the verb vadit can be used without an explicit it when the following clause explains what is bothersome.

So:

• Vadí ti, když... = Does it bother you if/when...

The whole když clause functions as the thing that bothers you.

Czech does not need a separate dummy subject like English it in this structure.

Here ti is singular informal you.

If you were speaking formally to one person, or to more than one person, you would use vám:

• Vadí vám, když večer poslouchám rádio v kuchyni?

So:

• ti = to you, singular informal
• vám = to you, plural or formal

This is an important distinction in Czech.

Yes, very much.

That is one of the most natural ways to understand it in English.

• Vadí ti, když večer poslouchám rádio v kuchyni?
• Do you mind if I listen to the radio in the kitchen in the evening?

Depending on tone and context, it can sound either like a straightforward question about annoyance or a polite request for permission. Czech often uses this structure in everyday speech for exactly that kind of meaning.