| Oper | Nominativ, Singular | nominative case, singular | |
| Oper | Genitiv, Singular | genitive case, singular | |
| Oper | Dativ, Singular | dative case, singular | |
| Oper | Akkusativ, Singular | accusative case, singular | |
| Opern | Nominativ, Plural | nominative case, plural | |
| Opern | Genitiv, Plural | genitive case, plural | |
| Opern | Dativ, Plural | dative case, plural | |
| Opern | Akkusativ, Plural | accusative case, plural |