Vītam regit fortūna.
Puellae librum do.
Cecilius Grumioni librum dat.
Viros sapientiam docet fortuna.
Enumerat miles vulnera, pastor oves.

Nominative - subject (agent of the verb)
Accusative - object (the verb is acting upon)
Dative - indirect object


Dies imago vitae, nox mortis est.
Speculum mentis est facies.
Domum ligni habeo.
Genitive - adjectival (relation to another noun)

te duce vincemus.
Saxis se defendunt.
tribus horis ambulavit.
Ablative - adverbial (situation of the verb or noun, preposition: cum, ex, de, ab, in, etc.)