Passive voice

• Active : She opens the door
  Passive : the door is opened by her
  
• Active : He didn't pass the exam
  Passive : The exam wasn't passed by him
  
• Active : She has drunk the water
  Pasiive : The water has been drunk by him
  
• Active : They will build the house
  Passive : The house will be built by them
  
• Active : Is she going to give us a book?
  Passive : Is a book going to be given to us?
  
• Active : I am watching the video
  Passive : The video is being wathed by me
  
• Active : I sing the song
  Passive : The song is sang by me
  
• Active : He was drinking the water when i came
  Passive : The water was being drank by him when i came
  
• Active : I cut the paper
  Passive : The paper is cut by me
  
• Active : I wrote the letter yesterday
  Passive : The letter was written by me yesterday