问题补充：
Qin Qins mother often buys stamps for her and helps her with it.变成同义句
答案：
Qin Qins mother often buys her stamps and helps her with it.
分析 buy sb sth = buy sth for sb 给某人买某物
======以下答案可供参考======
供参考答案1:
双宾语的转换，这是解题思路
Qin Qins mother often buys her stamps and helps her with it.
