Účastníci přinesou kuchyňské potřeby.

Because účastníci is the nominative plural of účastník (participant).

• singular: účastník
• plural: účastníci

This -i ending is typical for many masculine animate nouns in the nominative plural. Since účastníci is the subject of the sentence, it appears in the nominative case.

Přinesou is:

• 3rd person plural
• future
• from the verb přinést (to bring, perfective)

So it means they will bring.

The full agreement is with účastníci, which is plural, so the verb is also plural.

This is about aspect, which is very important in Czech.

• přinést = perfective verb
• přinášet = imperfective verb

A perfective verb often has a present-looking form that actually refers to the future. So:

• přinesou = they will bring
• budou přinášet = they will be bringing / they will bring repeatedly or as an ongoing process

In this sentence, přinesou suggests a completed action: the participants will bring the items.

It is in the accusative plural, because it is the direct object of the verb přinesou.

They will bring what?
→ kuchyňské potřeby

For this noun, the accusative plural looks the same as the nominative plural:

• nominative plural: kuchyňské potřeby
• accusative plural: kuchyňské potřeby

That is very common in Czech, especially with many inanimate nouns.

Because the adjective has to agree with the noun potřeby.

Potřeby is:

• plural
• feminine
• accusative here

So the adjective also takes the matching plural feminine/inanimate accusative form:

• kuchyňský = basic dictionary form
• kuchyňské potřeby = kitchen supplies / kitchen utensils

In Czech, adjectives change their endings to match the noun’s gender, number, and case.

It is plural.

The singular form is potřeba.
The plural form is potřeby.

So the sentence is talking about multiple kitchen items, not just one thing.

No, Czech word order is fairly flexible because case endings show grammatical roles.

The neutral order here is:

• Účastníci = subject
• přinesou = verb
• kuchyňské potřeby = object

So this is a very normal, neutral sentence.

But Czech could also reorder it for emphasis, for example:

• Kuchyňské potřeby přinesou účastníci.

That would still mean the same basic thing, but the focus or emphasis would be different.

Grammatically, účastníci is a masculine animate plural form.

It can refer to:

• a group of men
• a mixed group of men and women

If the group were specifically female, you would normally use:

• singular: účastnice
• plural: účastnice

So yes, the form is masculine animate, but in practice it can also be used for a mixed group.

A rough English-friendly guide would be:

• Účastníci ≈ OO-chast-nee-tsee
• přinesou ≈ przhi-neh-soh
• kuchyňské ≈ koo-khin-skay
• potřeby ≈ po-trzheh-bih

A few important sounds:

• č sounds like ch in check
• ř is a special Czech sound; English does not really have it
• ň sounds a bit like ny in canyon
• é is a long vowel

The stress in Czech is usually on the first syllable of each word.

Here are the basic dictionary forms:

• účastníci → účastník
• přinesou → přinést
• kuchyňské → kuchyňský
• potřeby → potřeba

This is useful because Czech words often appear in changed forms depending on case, number, person, tense, and aspect.

Normally, no. Přinesou is understood as future: they will bring.

If you wanted are bringing in the sense of a present ongoing action, Czech would usually use a present-tense imperfective form, such as:

• Účastníci přinášejí kuchyňské potřeby.

So přinesou specifically points to a future completed action, not an action happening right now.