1,These books are purchased at the bookstore
 =>The bookstore sells these books.
2, A lot of beer was drunk at the party
=> People drank a lot of beer at the party.
3, English is spoken all over the world
=> All over the world, people speak English.
4,The school grounds are cleaned by students every day
=> Students clean the school grounds every day.
5,This room is used every day for meetings
=> Meetings are held in this room every day.