An object is what receives the action of a case (in English) or accusative case (Greek, Latin, etc.).
. It is always in the objectiveAn object is always found by asking “what?” Any verb, verbal, or
can take an object.Jeb built a house.
Ask yourself…”Jeb built what?” Jeb built a house. Hence, “house” is the object of the verb “built”.
Learn how to diagram objects here.
In Hebrew, an object is often indicated by the particle “את“. See here.