2. Tom bought a nice present yesterday.
--> A nice present was bought yesterday by Tom.
3. Ann will sing a beautiful song.
--> A beautiful song will be sung by Ann.
4. Ben repaired my computer yesterday.
--> My computet was repaired yesterday by Ben.
5. My sister is making a tasty cake now.
--> A tasty is being made now by my sister.
6. We have bought tickets to the concert.
--> Tickets have been bought to the concert.
7. Helen teaches French at schoool.
--> French is taught at school by Helen.
8. They grows strawberries every year.
--> Strawberries are grown every year.
9. Tim sent an SMS to his friend.
--> An SMS was sent by Tim to his friend.
10. She has written a test today.
--> A test has been written today.
11. They visited that museum yesterday.
--> That museum was visited yesterday.