将下列句子变为被动语态1、I helped my mother2、His mother gave him a prese

1.My mother was helped by me.
2.He was given a birthday present by his mother for his birthday.
3.English is found very useful(by us).
4.He is often heard by me singing in his room.
5.A school that is going to be built by us in the small village.
6.English and French are spoken in Canada.
7.We were amused by the story.
8.I was asked to help them (out).
括号内的可以使用也可以忽略不用.