Diferencia Entre Voz Pasiva y Voz Activa

It is generally preferable to use the ACTIVE voice.

To change a passive voice sentence into an active voice sentence, simply reverse the steps shown above.
 

 1.  Move  the passive sentence's subject into the active  sentence's  direct object slot

 

 2.  Remove  the auxiliary verb be from the main verb and change main verb's form if needed

 

 3. Place the passive sentence's object of the preposition by into the subject slot.