把下列句子改为被动语态（双宾语）用两种方法谢谢

把下列句子改为被动语态（双宾语）用两种方法谢谢
1.Jack gave Lucy a nice present.
2.The students bought the teacher some flowers.
3.His sister gives me much help in my daily life.
4.We don’t teach kids French.
5.Our history teacher tells us many stories.
6.My pen pal often write me letters.
7.Can you bring me a cup of coffee?
8.We didn’t buy her anything for her birthday.
9.The boy often sings songs for his mother .
10.She showed me her drawings.

A nice present was given to Lucy by Jack.Lucy was gaven a nice present.
Some flowers were brought to the teacher by the students.
再问： The boy often sings songs for his mother .这个怎么做