Latin nouns are in five declensions. (See also Greek nouns) They are divided into six cases, the nominative, the vocative, the accusative, the genitive, the dative, and the ablative. The nominative is used for the subject noun (in the sentence the dog ruled over the cat, the dog would be in the nominative). The vocative case is used if someone is being called (in the sentence the dog shouted "Cat!" the cat would be in the vocative case). The accusative case is used for the object noun (in the sentence the dog ruled over the cat, the cat would be in the accusative case). The genitive case is used for possessive nouns (in the sentence the claws of the cat could not harm the dog, the cat would be in the genitive). The dative case is used in expressions involving "to", "for" or with the gerund