Alice,together with her friends,_punished for having broken the school rules.

因为对象是Alice 所以是单数Togetherwith her friends 只是插入语 去掉句子一样通顺，只是作了补充说明而已My friends and I were punished.....着重强调我朋友和我 供参考这个时候是着重强调我朋友和我，还是可以说and连接两个主语，是复数概念，所以谓语用复数。呵呵 其实请你说得是因果关系，正是因为and连接两个主语，所以强调了我朋友和我，自然用复数，感谢！