ABSTRACT
The nominative case is used for a subject, and the accusative for an object. Now there are four more cases for you to look at. First, the genitive case. The English preposition of is used to translate the genitive case:
dominus puellae
the master of the girl (the girl’s master)
fīlia servī
the daughter of the slave (the slave’s daughter)
girl
slave
Nominative
puella
servus
Accusative
puellam
servum
Genitive
puellae
servī