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Study this chart that shows how to change active sentences into passive sentences:
|PRESENT PERFECT, PAST PERFECT and FUTURE PERFECT|
I have mailed the gift.
Jack has mailed the gifts.
The gift has been mailed by me.
The gifts have been mailed by Jack.
Steven Spielberg had directed the movie.
Penny Marshall had directed those movies.
The movie had been directed by him.
The movies had been directed by her.
Jon will have finished it next month.
They will have finished it by next week.
It will have been finished by Jon by next month.
It will have been finished by them by next week.