1.I bought a book for you(改为否定句)

问题描述:

1.I bought a book for you(改为否定句)
2.She bought flowers for her sister(提问画线部分)
注:画线部分为flowers
3.He is making a birthday card(提问画线部分)
注:画线部分为a birthday card

1.I didn't buy a book for you.
2.What did she buy for her sister?
3.What is he making?