Negative Concord

In English, saying 'I don't know nothing' is often considered non-standard. In Polish, this structure is the only correct way to speak. This is called 'Negative Concord.'

1. The Verbal Hub
The most important rule is that the verb must be negated with nie. If you use a negative pronoun like nikt (nobody) or nic (nothing), the verb must have nie before it. Note that nie is written as a separate word from conjugated verbs, but it is usually joined to nouns and adjectives (e.g., nieszczęście - misfortune).

2. Stacking Negatives
You can stack as many negative words as needed. The sentence remains negative. For example: Nigdy nikomu nic nie powiem (I will never tell anyone anything) literally translates to 'Never to-nobody nothing not I-will-tell.'

3. The Genitive of Negation
When a verb that normally takes an Accusative object is negated, that object must change to the Genitive. This is called Genitive Under Negation. However, if a verb takes the Dative or Instrumental, the case does not change (e.g., Ufam mu vs Nie ufam mu).

4. Existence and Negation
To say 'there is not,' the verb jest changes to the special form nie ma, which always requires the Genitive case for the thing that is missing.

5. Stress and Pronunciation
When nie comes before a short, one-syllable verb, the word stress usually shifts to the nie. For example, nie wiem (I don't know) is pronounced NIE-wiem.

Nie Spelling Beyond Finite Verbs: Infinitives are separate: nie palić (not to smoke). Adverbs derived from adjectives are normally joined, including comparative and superlative forms under the 2026 rules: niedobrze, nielepiej, nienajlepiej. Other adverbs are normally separate: nie tutaj (not here), nie zawsze (not always). Explicit contrast can require separate spelling; negative concord and word spelling are different questions.

A short answer can omit the verb: Kto przyszedł? — Nikt (Who came? — Nobody). The negated-verb rule applies to the full negative clause, not to every fragment containing nikt.