I teach middle-school choir and occasionally have my own children in class. One day my son asked if he could have a pencil. As a teacher，I normally do not lend items to unprepared students；but as a mother，I help my children whenever I can. I asked my son whether he was speaking to his teacher or his mother. He replied，“It degends on who has the pencil."
　　我教初中的唱诗班，偶尔会教到自己的孩子。一天，我儿子问我是否能借给他一支铅笔。作为一位老师，我一般不借东西给那些不做课堂准备的学生。但作为一位母亲，我应随时帮助我的孩子。于是，我问儿子他是在跟老师说话，还是在跟母亲说话。而他却说：“那要看谁有铅笔了。”