My mother buys me a pen on my birthday.(改为同义句）
问题描述：
My mother buys me a pen on my birthday.(改为同义句）
答
My mother buys a pen for me on my birthday。
答
My mother buys me a pen on my birthday.My mother buys a pen for me (as present) on my birthday.——推荐My mother sends me a pen as a present on my birthday..供参