The Czech words všechno (everything) and všichni (all, everyone): Their declension varies based on gender, number, and case.
Perhaps the most important thing is that in many cases, everything after the root vše is cut off, and endings that we know from adjectives are added.
Všechno (Everything)
Its forms follow the declension pattern for the pronoun to (it).
As we can see in the following table, there are forms for all genders, but the most important is the bold right column for the neuter gender.
| Case | Masculine | Feminine | Neuter |
| Nominative | všechen | všechna | všechno |
| Genitive | všeho | vší | všeho |
| Dative | všemu | vší | všemu |
| Accusative | všeho | všechnu | všechno |
| Vocative | – | – | – |
| Locative | všem | vší | všem |
| Instrumental | vším | vší | vším |
| singular | plural | |
| 1. pád | všechen, všecek | všichni, všicci |
| 2. pád | všeho | všech |
| 3. pád | všemu | všem |
| 4. pád | všeho | všechny, všecky |
| 5. pád | všechen | všichni |
| 6. pád | všem | všech |
| 7. pád | vším | všemi |
Všichni (All, Everyone)
The forms change depending on the grammatical gender of the group being referred to.
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Všichni is used for masculine animate nouns (e.g., všichni muži – all men).
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Všechny is used for masculine inanimate and feminine nouns (e.g., všechny stoly – all tables, všechny ženy – all women).
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Všechna is used for neuter nouns (e.g., všechna auta – all cars).
Here’s the full declension for the plural pronoun, with the variations for different genders:
| Case | Masculine Animate | Masculine Inanimate / Feminine | Neuter |
| Nominative | všichni | všechny | všechna |
| Genitive | všech | všech | všech |
| Dative | všem | všem | všem |
| Accusative | všechny | všechny | všechna |
| Vocative | – | – | – |
| Locative | všech | všech | všech |
| Instrumental | všemi | všemi | všemi |
Declension of Kámen
Kámen is a Czech noun meaning “stone.”
Czech declensions can be complex, and there are exceptions to general rules. Kámen is
one of these exceptions.
Here’s how it’s declined in the singular and plural:
Singular
| Case | Masculine |
|---|---|
| Nominative | kámen |
| Genitive | kamene |
| Dative | kameni |
| Accusative | kámen |
| Locative | kameni |
| Instrumental | kamenem |
Plural
| Case | Masculine |
|---|---|
| Nominative | kameny |
| Genitive | kamenů |
| Dative | kamenům |
| Accusative | kameny |
| Locative | kamenech |
| Instrumental | kameny |
| Pád | Jednotné číslo | Množné číslo |
|---|---|---|
| Nominativ | kámen | kameny |
| Genitiv | kamene/kamenu | kamenů |
| Dativ | kameni/kamenu | kamenům |
| Akuzativ | kámen | kameny |
| Vokativ | kameni | kameny |
| Lokál | kameni/kamenu | kamenech |
| Instrumentál | kamenem | kameny |
