Me gustaría testificar a favor del acusado, porque me consta que no es culpable.I would like to give evidence for the accused, because I know he's not guilty.
Un verbo transitivo es un verbo que requiere de un objeto directo (p. ej. Yo compré un libro.).
Los detenidos testificaron que no habían cometido ninguno de los delitos que se les imputaban.Those arrested attested that they hadn't committed any of the crimes they were accused of.
La mujer testificó que su marido había dormido en casa la noche en que se perpetró el crimen.The woman testified that her husband had spent the night at home when the murder was perpetrated.
Las huellas de los zapatos del acusado testifican su presencia en la escena del crimen.The footprints of the accused's shoes testify to his presence at the crime scene.
El largo tiempo que el candidato se ha tomado para responder a nuestra oferta testifica su falta de interés.The long time the candidate has taken to answer our offer attests to his lack of interest.