TASK ABOUT ACTIVE N PASSIVE VOICE

Active voice  are the sentences with the subject doing something,

       while the passive voice are sentence with a subject to employment,

in the task i have two for example to see the change sentence from a active voice to passive voice and otherwise.

The example change active sentences to passive sentences :

* Thomas a Edison invented the photograph (active voice)

   photo found by Thomas a Edison (passive voice )

the last example change passive sentences to active sentence: 

* These letters are going to be mailed by lusi tomorrow (pasive voice)

    lusi will send the letters tomorrow  (active voice)

of the two examples above we can deduce the active sentence the subject is at the beginning of the sentence because the subject is doing something but in the passive voice sentence the subject behind