You can play computer games if you finish you homework
You can play computer games if your homework is
finished
Does Helen often write short stories for children?
Does short stories often writen by Helen for children.
Tom worked out the plan yesboard.
The plan was worked out by Tom yesterday.
Did the students turn on the television just now?
Was the television turned off by the students just now?
Where did they buy the new keyboard?
Where was the new keyboard bought?