"I support my father."
Translation:Yo apoyo a mi padre.
the 'a' is the personal "a" that must be used if a direct object is a person or beloved animal. It is not translated, but must be there. Google "personal a Spanish" and you'll find several good sites that will explain it fully
Why not "lo apoyo a mi padre"? I can't seem to grasp when to use the direct object pronoun and when not to