1.I sent a letter to you last month.
a letter was sent to you last month
2.Do we use it for cooking?
does it be used for cooking by us?
3.where did you build the bridge?
where was the bridge built?
4.Mother tells me a story every day.
a story is been told to me everyday by mother.
5.Can you finish his homework today?
can his homework be finished today by you?