die · Feminine (Femininum)B1Feminine DeclensionCulture & Ideas

die Oper

opera

Nominative Sg.die Oper

Genitive Sg.der Oper

Nominative Plural

die Opern

Dative Pluralden Opern

Gender / Plural CueException: ends in -er but feminine (die Oper)

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 Oper	die Opern
Accusative Akkusativ (Wenfall)	Wen oder was?	die Oper	die Opern
Dative Dativ (Wemfall)	Wem?	der Oper	den Opern
Genitive Genitiv (Wesfall)	Wessen?	der Oper	der Opern

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 Oper	Opern
Accusative Akkusativ (Wenfall)	Wen oder was?	eine Oper	Opern
Dative Dativ (Wemfall)	Wem?	einer Oper	Opern
Genitive Genitiv (Wesfall)	Wessen?	einer Oper	Opern

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 Oper	keine Opern
Accusative Akkusativ (Wenfall)	Wen oder was?	keine Oper	keine Opern
Dative Dativ (Wemfall)	Wem?	keiner Oper	keinen Opern
Genitive Genitiv (Wesfall)	Wessen?	keiner Oper	keiner Opern

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 Oper	meine Opern
Accusative Akkusativ (Wenfall)	Wen oder was?	meine Oper	meine Opern
Dative Dativ (Wemfall)	Wem?	meiner Oper	meinen Opern
Genitive Genitiv (Wesfall)	Wessen?	meiner Oper	meiner Opern

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 "Opern" already ends in -n or -s, so Dative plural stays Opern.

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 Oper dauert fast drei Stunden.

The opera lasts almost three hours.

Accusative

Wir sehen heute eine Oper von Mozart.

Today we are seeing an opera by Mozart.

Dative

In der Oper darf man nicht fotografieren.

You are not allowed to take photos in the opera house.

Interactive Tools & Related Guides

Check "Oper" 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 Oper

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

"Oper" takes the feminine definite article "die" (die Oper). Gender cue: Exception: ends in -er but feminine (die Oper).

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

The Nominative plural of die Oper is "die Opern" (pattern: -n). In the Dative plural it becomes "den Opern".

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

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