It commutes with personal pronouns lo, las, los, las, when it is no longer one of them. It goes after the verb without a proposition or with the proposition "a", but with no other. It is often constructed with "a" when we refer to persons or things personified, and above all, to indicate that he is not a subject. When he returns the sentence by passive he becomes a patient subject. The complements of measurement, duration, weight and price perform the CD function, since they can be switched by the attonoslo, the, or the