Negation with "nicht" and "kein"

German has two main words for "not" that a beginner needs, and choosing between them almost always comes down to one simple question — is a noun with an indefinite article (or no article at all) involved, or not?

Quick shortcut: negating an indefinite noun (with a form of ein, or no article) → kein. Negating almost everything else — a verb, an adjective, a specific noun — → nicht.

Kein: negating a noun

Kein negates a noun that would otherwise take a form of the indefinite article — ein, eine, einen, and so on — or no article at all, as with a plain plural. In the singular it takes the same endings ein does, and it simply replaces ein/eine rather than combining with it.

Notice the last row: since a plain indefinite plural has no article at all, there's nothing for kein to replace — it's simply added in front of the noun. At this level, the plural form you'll mostly meet is keine: keine Hunde, keine Bücher.

For the ordinary meaning "I don't have a car," German fuses "not a" into the single word kein: ✅ Ich habe kein Auto. Nicht ein does exist, but only for special emphasis or contrast ("not one single..."), not for everyday negation — that's a nuance for later, not the beginner default.

Kein is for negating a noun itself, not a name or an activity — Ich kenne Peter nicht ("I don't know Peter"), never keinen Peter, since a proper name never took ein to begin with.

Nicht: negating almost everything else

Nicht negates a verb, an adjective, an adverb, or a noun phrase that's already specific or identified — for example one with a definite article or a possessive. Unlike kein, it never changes form — it's always just nicht.

• Ich komme nicht. — I'm not coming. (negating the verb)
• Das Auto ist nicht neu. — The car isn't new. (negating an adjective)
• Er lernt nicht gut. — He doesn't learn well. (negating an adverb)
• Das ist nicht mein Buch. — That's not my book. (negating a specific noun phrase with a possessive)
• Das ist nicht der Lehrer. — That's not the teacher. (negating a noun phrase with a definite article)

Where does nicht go?

Unlike kein, which sits right in front of the noun it negates, nicht can move around the sentence. Two beginner-level patterns cover most simple sentences:

• Negating the whole sentence: in a simple sentence, nicht often comes near the end — after the object or a time expression, but before a final verb part if there is one:
  • Ich verstehe das nicht. — I don't understand that.
  • Er kommt heute nicht. — He's not coming today.
  • Ich stehe nicht auf. — I'm not getting up. (right before the separable prefix auf)
  • Ich kann nicht schwimmen. — I can't swim. (right before the infinitive)
• Negating one specific word: nicht goes directly before the word it negates, wherever that falls in the sentence:
  • Das Auto ist nicht neu. (specifically "new" is being denied, not the whole statement)
  • Ich komme nicht heute, sondern morgen. — I'm not coming today, but tomorrow.

This covers the common beginner cases, but word order with place/direction phrases (Ich gehe heute nicht ins Kino) can behave differently and is worth its own closer look later — treat the patterns above as a solid starting point, not a complete rule.

Common mistakes

• ❌ Ich habe nicht ein Auto. → ✅ Ich habe kein Auto. — the everyday meaning "don't have a car" is the single word kein, not nicht plus ein
• ❌ Ich komme kein. → ✅ Ich komme nicht. — a verb is always negated with nicht, never kein
• ❌ Das ist nicht eine Katze. → ✅ Das ist keine Katze. — the same kein-for-nouns rule applies after sein too
• ❌ Forgetting to decline kein for gender/case, e.g. Ich habe kein Hund → ✅ Ich habe keinen Hund — kein changes form just like ein does, it isn't one fixed word

Quick check

A quick check: which form fits — nicht or a form of kein?

1. Ich habe ___ Zeit. (time, feminine — no time at all)
2. Das Buch ist ___ interessant. (not interesting)
3. Ich sehe ___ Auto. (no car at all, neuter)
4. Er kommt heute ___.

Key takeaways

• Kein negates a noun that would take a form of ein or no article at all — it takes the same endings ein does, plus its own plural form, keine.
• Nicht negates everything else: verbs, adjectives, adverbs, and noun phrases that are already specific (a definite article or possessive).
• For the everyday meaning "not a / no," German normally fuses it into kein rather than saying nicht ein.
• In a simple sentence, nicht usually comes near the end to negate the whole statement, but moves directly in front of a specific word to negate just that word — and comes right before a separable prefix or infinitive.