Easy
The cleaner has cleaned the office.
[ The office has been cleaned
My grandfather built this house in 1943.
This house was built in 1943 by my grandfather
The Government is planning a new road near my house.
A new road is being planned near my house
Somebody should do the work.
The work should be done
Somebody has drunk all the milk!
All the milk has been drunk
Picasso was painting Guernica at that time.
Guernica was being painted at that time by Picasso
People speak Portuguese in Brazil.
Portuguese is spoken in Brazil
A workman will repair the computer tomorrow.
The computer will be repaired tomorrow
They are building a new stadium near the station.
A new stadium is being built near the station
Everybody loves Mr Brown.
Mr Brown is loved by everybody
James might cook dinner.
Dinner might be cooked by James
At six o'clock someone was telling a story.
At six o'clock a story was being told
The wolf ate the princess.
The princess was eaten by the wolf
Somebody will find your glasses.
Your glasses will be found
I lent a pencil to Graham
Graham was lent a pencil/ A pencil was lent to Graham