Výzva přišla dnes.

Because the subject, výzva, is a feminine singular noun.

In Czech past tense, the verb agrees with the subject in gender and number:

• masculine singular: přišel
• feminine singular: přišla
• neuter singular: přišlo
• plural: different forms depending on gender

So přišla tells you that the thing that came is one feminine noun.

The dictionary form is přijít.

That means přišla is the past form of přijít. This is a very common Czech verb, but its forms change quite a bit, so the connection is not always obvious at first:

• infinitive: přijít
• past feminine singular: přišla
• past masculine singular: přišel

So yes, this is one of those verbs where you need to learn the principal forms rather than expecting everything to look regular.

Because Czech does not build this kind of past meaning the way English does.

In 3rd person past tense, Czech usually just uses the past form itself:

• přišel = he came
• přišla = she/it came
• přišli = they came

There is no extra auxiliary in 3rd person here.

In 1st and 2nd person, you do get auxiliary forms:

• přišel jsem = I came
• přišla jsi = you came

But in 3rd person, the verb stands alone.

Because it is the subject of the sentence, so it is in the nominative case.

The sentence structure is basically:

• Výzva = subject
• přišla = verb
• dnes = time adverb

So výzva appears in its basic dictionary form here. It is a feminine noun of the -a type.

No. Výzva can mean several related things depending on context.

Common possibilities include:

• challenge
• call
• appeal
• prompt
• invitation to act

So even if the grammar is clear, the exact English wording may depend on the situation. Czech often uses this word more broadly than English learners first expect.

Yes, the word order can change.

Czech word order is much more flexible than English because grammatical roles are often shown by endings rather than position. So you can also hear:

• Dnes přišla výzva.
• Přišla dnes výzva.

These versions are not all used in exactly the same way, though. The change usually affects focus or emphasis:

• Výzva přišla dnes. = neutral statement, with today as the final piece of information
• Dnes přišla výzva. = stronger focus on today
• Přišla dnes výzva. = possible in context, often more marked

So the original sentence is a very natural, normal order.

Because Czech has no articles.

Unlike English, Czech does not normally use words equivalent to a/an or the. Whether výzva means a challenge, the challenge, an appeal, or the appeal depends on context.

This is one of the biggest differences from English, and learners often have to get used to relying more on the situation and surrounding sentences.

For practical modern Czech grammar, dnes is treated as an adverb meaning today.

It does not change for case, gender, or number. In this sentence it simply tells you when the action happened.

So you can think of the sentence pattern as:

• subject: Výzva
• verb: přišla
• time adverb: dnes

Because přijít is perfective, and here the sentence presents the event as a completed whole.

That is very natural when talking about a single finished arrival:

• Výzva přišla dnes. = the arrival happened today

If you used an imperfective verb, the meaning would shift. For example, an imperfective form would be more about process, repetition, or background action, not just a simple completed event.

So in this sentence, přišla is exactly what you would expect.

The hardest part for most English speakers is ř.

A useful approximation is to think of it as a kind of r plus zh sound said together. It is not perfect, but it helps at first.

Rough guides:

• výzva ≈ VEE-zva
  
  • ý is a long vowel
• přišla ≈ something like przhish-la as a rough learner approximation
• stress in Czech is normally on the first syllable

Do not worry if your ř is not perfect right away. Even many advanced learners need a long time to get comfortable with it.