| Modulsystem | Nominativ, Singular | nominative case, singular | |
| Modulsystem(e)s | Genitiv, Singular | genitive case, singular | |
| Modulsystem(e) | Dativ, Singular | dative case, singular | |
| Modulsystem | Akkusativ, Singular | accusative case, singular | |
| Modulsysteme | Nominativ, Plural | nominative case, plural | |
| Modulsysteme | Genitiv, Plural | genitive case, plural | |
| Modulsystemen | Dativ, Plural | dative case, plural | |
| Modulsysteme | Akkusativ, Plural | accusative case, plural |