die Operation
Plural: die Operationen
Nominativ
Akkusativ
Dativ
Genitiv
| Case | Definite | Indefinite | Plural |
|---|---|---|---|
| Nominativ | die Operation | eine Operation | die Operationen |
| Akkusativ | die Operation | eine Operation | die Operationen |
| Dativ | der Operation | einer Operation | den Operationen |
| Genitiv | der Operation | einer Operation | der Operationen |
Nominative — the subject of the sentence: who or what is doing something.
die Operation · eine Operation
Accusative — the direct object (whom or what?), and always after für, durch, gegen, ohne and um.
die Operation · eine Operation · für die Operation
Dative — the indirect object (to or for whom?), and always after mit, nach, aus, zu, von and bei.
der Operation · einer Operation · mit der Operation
Genitive — possession (whose?), and after wegen, trotz and während.
der Operation · einer Operation · wegen der Operation
In the plural it is die Operationen in the nominative and accusative, den Operationen in the dative and der Operationen in the genitive. There is no indefinite article in the plural.
Die Operation am Knie ist gut verlaufen.
The operation on the knee went well.
💡 Why die? “Operation” ends in -tion, and nouns with this ending always take die. Another example: die Information