Имперсональная конструкция (Impersonal Passive):
It is said that Albert Einstein was a genius. It is believed that incredible contributions were made to physics by him. It is known by everyone that the theory of relativity was developed by him. It is thought by scientists that his work changed our understanding of the universe. It is expected that his ideas will continue to influence science for centuries to come. He is also remembered for his famous equation E=mc². He became a symbol of intelligence and creativity.
Персональная конструкция (Personal Passive):
People say that Albert Einstein was a genius. People believe that incredible contributions were made to physics by him. Everyone knows that he developed the theory of relativity. Scientists think that his work changed our understanding of the universe. People expect that his ideas will continue to influence science for centuries to come. People remember him for his famous equation E=mc². He became a symbol of intelligence and creativity.
Теперь у вас есть обе конструкции — импersonal и personal passive.