die · Feminine (Femininum)B2Feminine DeclensionWork & Bureaucracy

die Kooperation

cooperation / partnership

Nominative Sg.die Kooperation

Genitive Sg.der Kooperation

Nominative Plural

die Kooperationen

Dative Pluralden Kooperationen

Gender / Plural CueSuffix -tion -> ALWAYS feminine (die)

Full 4-Case Declension Table

Switch determiner types to inspect how articles and noun endings change together.

Definite (der / die / das): Used for specific, already known, or general-category nouns.

Case (Fall)	Question	Singular	Plural
Nominative Nominativ (Werfall)	Wer oder was?	die Kooperation	die Kooperationen
Accusative Akkusativ (Wenfall)	Wen oder was?	die Kooperation	die Kooperationen
Dative Dativ (Wemfall)	Wem?	der Kooperation	den Kooperationen
Genitive Genitiv (Wesfall)	Wessen?	der Kooperation	der Kooperationen

Indefinite (ein / eine): Used when introducing a countable singular noun; has no plural article in German.

Case (Fall)	Question	Singular	Plural
Nominative Nominativ (Werfall)	Wer oder was?	eine Kooperation	Kooperationen
Accusative Akkusativ (Wenfall)	Wen oder was?	eine Kooperation	Kooperationen
Dative Dativ (Wemfall)	Wem?	einer Kooperation	Kooperationen
Genitive Genitiv (Wesfall)	Wessen?	einer Kooperation	Kooperationen

Negative (kein / keine): Negates nouns with or without an indefinite article; follows ein-words in singular and die in plural.

Case (Fall)	Question	Singular	Plural
Nominative Nominativ (Werfall)	Wer oder was?	keine Kooperation	keine Kooperationen
Accusative Akkusativ (Wenfall)	Wen oder was?	keine Kooperation	keine Kooperationen
Dative Dativ (Wemfall)	Wem?	keiner Kooperation	keinen Kooperationen
Genitive Genitiv (Wesfall)	Wessen?	keiner Kooperation	keiner Kooperationen

Possessive (mein / dein / …): Uses ein-word endings in singular and definite-like endings in plural (mein/dein/sein/ihr/unser/euer/Ihr).

Case (Fall)	Question	Singular	Plural
Nominative Nominativ (Werfall)	Wer oder was?	meine Kooperation	meine Kooperationen
Accusative Akkusativ (Wenfall)	Wen oder was?	meine Kooperation	meine Kooperationen
Dative Dativ (Wemfall)	Wem?	meiner Kooperation	meinen Kooperationen
Genitive Genitiv (Wesfall)	Wessen?	meiner Kooperation	meiner Kooperationen

Why These Endings Work

All feminine (die) nouns stay completely unchanged in the singular across Nominative, Accusative, Dative, and Genitive.

Feminine nouns never change their own ending in the singular across all four cases.
Plural "Kooperationen" already ends in -n or -s, so Dative plural stays Kooperationen.

Pattern summary: Only the article changes in singular (die / die / der / der); plural takes -n in Dative unless ending in -n or -s.

Example Sentences in Context

Nominative

Die Kooperation zwischen den beiden Ländern funktioniert gut.

Cooperation between the two countries works well.

Genitive

Dank der Kooperation mit einer Hochschule bietet die Firma Praktika an.

Thanks to its cooperation with a university, the company offers internships.

Interactive Tools & Related Guides

Check "Kooperation" in Der/Die/Das Checker Analyze in Compound Deconstructor Inspect Example in Sentence Analyzer

German Gender & ArticlesPredict der, die, das with high-frequency endings The Four German CasesNominative, Accusative, Dative, and Genitive roles Noun Plurals & Dative -nPlural patterns and the Dative plural -n rule Dative Case GuideIndirect objects, prepositions, and der + feminine nouns

FAQs: die Kooperation

Is "Kooperation" der, die, or das in German?

"Kooperation" takes the feminine definite article "die" (die Kooperation). Gender cue: Suffix -tion -> ALWAYS feminine (die).

What is the plural and Dative plural of "die Kooperation"?

The Nominative plural of die Kooperation is "die Kooperationen" (pattern: -en). In the Dative plural it becomes "den Kooperationen".

How does "die Kooperation" change in the Genitive, Accusative, and Dative?

As a feminine noun, "Kooperation" keeps the exact same stem in all four singular cases; only the article changes (die Kooperation / die Kooperation / der Kooperation / der Kooperation).