A declination is a change in a word's appearance depending on the grammatical case. For example, the noun der Mann (the man) becomes des Mannes (of the man) in the genitive case, or the plural form die Mütter (the mothers) becomes den Müttern (to the mothers) in the dative case. In modern German, feminine nouns do not change their form according to case. Plural nouns add an -n to their plural form; unless they already end in an -n or in an -s. Most masculine and neuter nouns only change their form in the genitive, by adding either -s (usually in words with more than one syllable) or -es (usually in monosyllabic words). Examples:
Some masculine nouns, however, add an -n or -en to the accusative, the dative, and the genitive case.
Nominative:
Accusative:
Dative:
Genitive:
Case system
Nominative
Accusative
Dative
Genitive
Pronouns, case inflections