Theorie:
Passive Voice
In order to construct the passive voice, you need a form of BE and the 3rd form.
e.g. I do my homework. > The homework is done by me.
Depending on the tense used in the active phrase, the tense equally changes in the passive voice.
PRESENT SIMPLE: I do my homework. > The homework is done by me.
PAST SIMPLE: I did my homework. > The homework was done by me.
PRESENT PERFECT: I have done my homework. > The homework has been done by me.
PAST PERFECT: I had done my homework. > The homework had been done by me.
PRESENT PROGRESSIVE: I am doing my homework. > The homework is being done by me.
PAST PROGRESSIVE: I was doing my homework. > The homework was being done by me.
WILL-FUTURE: I will do my homework. > The homework will be done by me.
MODAL VERBS: I must do my homework. > The homework must be done by me.