What is the difference between nicht and kein?

kein negates a noun that would otherwise take an indefinite article (ein/eine) or no article at all — uncountable nouns like Wasser, mass nouns like Geld, and zero-article plurals. nicht negates everything else: verbs, adjectives, adverbs, and nouns that carry a definite article (der/die/das) or a possessive (mein/dein/sein). The deciding test is simple: would the noun take ein/eine or no article? → kein. Anything else? → nicht.

Where does nicht go in a German sentence?

The single unifying rule: nicht goes as late as possible, except directly before the element being focally negated. If you are negating a specific complement — a predicative adjective (nicht rot), a prepositional phrase (nicht nach Berlin), a separable prefix (nicht an-), or a participle/infinitive in the verb bracket (nicht gesagt, nicht kommen) — nicht lands directly before that element. If nothing specific is being focally negated, nicht falls at the end of the clause or just before the verb-bracket element. Most learners memorise seven separate position rules; they are all consequences of this one principle.

How do you decline kein?

kein follows the ein-declension exactly: keinen Mann (Akk. masc.), keine Frau (Nom./Akk. fem.), kein Kind (Nom./Akk. neut.), keiner Frau (Dat. fem.), keinem Mann/Kind (Dat. masc./neut.), keines Mannes/Kindes (Gen. masc./neut.). The crucial difference from ein: kein has a plural form (keine Kinder, keinen Kindern in Dative), whereas ein has no plural at all — that is why German needs two separate negation words in this slot.

What is the difference between nichts and nicht?

nichts is a pronoun meaning "nothing": Ich weiß nichts. nicht is an adverbial particle meaning "not" that negates something else: Ich weiß es nicht. They are not interchangeable. Additionally, nichts can take adjectival endings after it: nichts Neues (neuter nominative weak ending), nichts Wichtiges. nicht never takes noun or adjective endings.

Can you use kein with plural nouns?

Yes — and this is one of the most frequently missed points in beginner grammar. Ich habe keine Bücher means "I don't have any books." The plural nominative/accusative form is keine; the plural dative form is keinen (Ich helfe keinen Kindern). English speakers often over-use nicht here because they translate from "I don't have books" and reach for the particle instead of the negative article.

What is the difference between partial and total negation?

Total negation means the entire clause is negated: Ich gehe nicht ins Kino — "I'm not going to the cinema." Partial negation means only one specific element is negated, often followed by a sondern-clause that states the alternative: Ich gehe nicht ins Kino, sondern ins Theater — "I'm not going to the cinema, but rather to the theater." The position of nicht shifts accordingly: total negation → nicht falls late (often clause-final or before the verb bracket); partial negation → nicht sits directly before the focally-negated element. This scope distinction explains the entire position system.

How do you negate a sentence with a separable-prefix verb?

nicht goes between the conjugated verb and the separable prefix at the clause end: Ich rufe sie heute nicht an — "I'm not calling her today." The prefix an counts as the second part of the verb bracket (Satzklammer), so nicht slots in just before it. Placing nicht elsewhere (*Ich rufe nicht sie heute an, *Ich rufe sie nicht heute an with the meaning of negating heute) produces a different scope — negating heute rather than the verb phrase — which is usually not what is intended.

Are there other negation words besides nicht and kein?

Yes: nie / niemals ("never"), niemand ("nobody" — declines like kein in singular: niemanden, niemandem, niemandes), nirgends / nirgendwo ("nowhere"), weder … noch ("neither … nor"), nichts ("nothing" — a pronoun, covered above), and kaum ("hardly" — semantically negative but not a formal negator). Crucially, German does not use double negatives: Ich habe nichts is correct; *Ich habe nichts nicht is ungrammatical. Choose one negating element per clause.

Two questions, one rule each.

German negation reduces to two questions: which negator do I use — nicht or kein? And where does nicht go? Each question has exactly one rule. Most resources turn them into seven bullet points; this page does not.

TL;DR

nicht vs. kein: if the noun would take ein/eine or no article (mass noun, plural), use kein. Everything else — verbs, adjectives, adverbs, definite-article nouns — takes nicht. Position of nicht: as late as possible, except directly before the element being focally negated. kein declension: follows the ein-declension exactly, but unlike ein it has a plural form (keine). Other negators: nie, niemand, nirgends, weder…noch — one negator per clause; no double negatives.

Two questions, not seven rules

English has one negation word: not. German has two: nicht and kein. That creates question one — which negator? The answer fits in one sentence: look at what article the noun would take. ein/eine or no article? Use kein. Anything else? Use nicht.

Then comes question two — where does nicht go? Most textbooks answer this with a list of position rules: "nicht goes before the predicate adjective … before infinitives … after the direct object … after time adverbials …". Those rules are not wrong, but they obscure the single logic underneath them: nicht goes as late as possible, except directly before the element being focally negated. Every "rule" on that list is just an application of this one principle to a specific sentence type.

nicht vs. kein — the decision block

The deciding test is the article the noun would carry in an affirmative sentence. That is the only information you need.

nicht vs. kein

Both mean 'not', but each targets a different grammatical object.

kein negative article — negates nouns

Noun would take ein/eine or no article

Ich habe keinen Hund. — Ich trinke keinen Kaffee. — Ich habe keine Geschwister.

I have no dog. — I drink no coffee. — I have no siblings.

nicht negation particle — negates everything else

Verb, adjective, adverb, or definite/possessive noun

Ich kenne den Mann nicht. — Das Auto ist nicht rot. — Ich schlafe nicht.

I don't know the man. — The car is not red. — I'm not sleeping.

Possession test: 'Ich habe keinen Bruder' (no article → kein) vs. 'Ich kenne den Bruder nicht' (definite article → nicht).

Use kein when…

the noun would take ein/eine — Ich habe keinen Hund
the noun takes no article (mass nouns) — Ich habe keine Zeit
negating a zero-article plural — Ich habe keine Bücher

Use nicht when…

negating a definite-article noun — Ich kenne den Mann nicht
negating a verb — Ich verstehe nicht
negating an adjective or adverb — Das ist nicht gut

The three-step decision flow

Walk through these three questions in order. The first "yes" gives you the answer.

nicht or kein? — decision flow

DIAGRAM

Does the noun carry der/die/das or a possessive (mein/dein/…)?

Yes → use nicht

Would the noun take ein/eine or no article at all (mass noun or plural)?

Yes → use kein

Negating a verb, adjective, adverb, or whole sentence?

Yes → use nicht

Work top to bottom; stop at the first 'yes'.

kein declension: the full table

kein follows the ein-declension exactly — same endings, every case. The only difference: kein has a plural form. ein does not. That is the entire reason German needs both words in this slot.

kein — all cases and genders

TABLE

Follows ein-declension; plural forms exist where ein has none

Fall	Maskulin	Feminin	Neutrum	Plural
Nominativ	kein	keine	kein	keine
Akkusativ	keinen	keine	kein	keine
Dativ	keinem	keiner	keinem	keinen
Genitiv	keines	keiner	keines	keiner

The position of nicht — one rule, four applications

The rule: nicht goes as late as possible, except directly before the element being focally negated.

Every sub-case below is just this rule applied to a specific sentence structure. Learn the rule; the sub-cases follow automatically.

A — focal negation

Directly before the focally-negated element: predicative adjective, prepositional phrase, separable prefix.

Das Auto ist nicht rot.

The car is not red. (negates the adjective)

Ich fahre nicht nach Berlin.

I'm not going to Berlin. (negates the destination, not the going)

B — after a definite-article object

When negating a transitive verb whose object has a definite article, nicht falls at the end — nothing specific is being focally negated.

Ich kenne den Mann nicht.

I don't know the man.

Sie versteht die Frage nicht.

She doesn't understand the question.

C — before the verb bracket

In compound tenses and modal constructions, nicht goes just before the closing bracket element: separable prefix, past participle, or infinitive.

Ich rufe sie heute nicht an.

I'm not calling her today. (separable prefix)

Er hat das nicht gesagt.

He didn't say that. (Perfekt)

Sie kann nicht kommen.

She can't come. (modal + infinitive)

D — TeKaMoLo order in the middle field

When time (Te), cause (Ka), manner (Mo), and place (Lo) adverbs are all present, nicht follows the time adverb but precedes manner and place adverbs.

Ich gehe heute nicht mit dir ins Kino.

I'm not going to the cinema with you today. (heute = Te; mit dir = Mo; ins Kino = Lo)

Read the full word-order guide →

Partial vs. total negation

Total negation

The entire clause is negated. nicht falls late.

Ich gehe nicht ins Kino.

I'm not going to the cinema (at all).

Partial negation

Only one element is negated. nicht sits directly before it, often with a sondern-clause.

Ich gehe nicht ins Kino, sondern ins Theater.

I'm not going to the cinema — I'm going to the theater instead.

English speakers usually think of negation as a simple on/off switch. German marks whether the negation has scope over the whole clause (total) or over one element (partial) through the position of nicht. The sondern continuation is the strongest signal of partial negation.

Other negation words

nicht and kein cover most situations. These six cover the rest.

Negation vocabulary

LIST

nie / niemals never Ich rauche nie. / Das mache ich niemals.

niemand nobody Declines: niemanden (Akk), niemandem (Dat), niemandes (Gen).

nirgends / nirgendwo nowhere Ich finde es nirgends. Both forms are standard.

weder … noch neither … nor Weder er noch sie kommt. Correlative pair.

nichts nothing Pronoun, not a particle. Takes adjective endings: nichts Neues.

kaum hardly Semantically negative but not a formal negator. Ich schlafe kaum.

5 mistakes English speakers make

Using nicht ein instead of kein

Ich habe nicht ein Buch. → Ich habe kein Buch.

nicht + ein never combines; that slot always becomes kein.

Using nicht for zero-article plurals

Ich habe nicht Bücher. → Ich habe keine Bücher.

Zero-article plurals need kein, just as zero-article singulars do.

Placing nicht too early (before the verb)

Ich nicht verstehe das. → Ich verstehe das nicht.

nicht cannot sit in front of the conjugated verb. It belongs in the middle or at the end of the clause.

Confusing nichts (pronoun) with nicht (particle)

Ich weiß nicht. (means "I don't know") vs. Ich weiß nichts. (means "I know nothing")

Both are grammatically correct but mean different things. nichts is a pronoun that replaces an object; nicht negates the predicate.

Translating English double negatives literally

Ich habe nichts nicht gesagt. → Ich habe nichts gesagt.

German uses exactly one negator per clause. Two negators do not intensify — they produce ungrammatical output.