present perfect passive = сущ. + have/has been + глагол в 3 форме
past perfect passive = сущ. + had been + глагол в 3 форме
Объяснение:
the whole text has been translated by me
the work had been finished by six o'clock by them
A number of important experiments in this laboratory have been made by them
the trucks had been loaded by three o'clock by the workers
the story have been forgotten