"Stephanus goes home."
Translation:Stephanus domum it.
Domus is special in that it does not get paired with a preposition in these contexts (much like English):
- Domum eō = "I am going home" (that is, to my home)
- Domī sum = "I am home"/"I am at home"
- Domō veniō = "I am coming from home"
(1) is the accusative case, which can express motion towards something; (2) is the locative case, which is only used with some words, and expresses location (without motion); and (3) is the ablative case, which can express motion from something.