Active voice -> Passive voice
1. What caused the accident?
2. No one let me touch that bottle.
3. She has just made a plumber repair the shower.
4. Do this work at once.
5. They saw the thief broken into that house.
6. It's difficult for us to remember all these rules.
1. What caused the accident?
-> What was the accident caused by ?
2. No one let me touch that bottle.
-> I wasn't allowed to touch that bottle
3. She has just made a plumber repair the shower.
-> She has just had the shower repaired by a plumber.
4. Do this work at once.
-> This work should be done at once.
5. They saw the thief break into that house.
-> The thief was seen to break into that house.
6. It's difficult for us to remember all these rules.
-> It's difficult for all these rules to be remembered by us