All visitors must wear identity badges.
Identity badges must be worn by all visitors.
The students must pay all they own fees for this course.
All the fees for this course must be paid by the students.
Is anyone using the computer?
Is the computer being used?
Nobody informed the police that there had been a mistake.
The police was never informed that there had been a mistake.
Someone must have changed the time of the meeting.
The time of the meeting must've been changed.
Where will your company send you next year?
Where will you be sent next year?
The teacher has marked all the homework
All the homework has been marked.
They use a computer to do that job nowadays.
A computer is used to do that job nowadays.
Has anyone ever asked you for your opinion?
Have you ever been asked for your opinion?
My boyfriend kept me waiting for half an hour.
I was kept waiting for half an hour.
I've still got the camera because nobody has claimed it.
I've still got the camera because it hasn't been claimed.
The children shouldn't have opened that parcel.
That parcel shouln't have been opened by the children.
Do you suppose your brother could have written the email?
Do you suppose the email could have been written by your brother?
During the summer, the café was employing more waiters every week.
During the summer more waiters were employed every week.
The news about the war worried Josephine.
Josephine was worried by the news about the war.