【1】The teacher asked the children to tell the good news to their mother

备注(1):用单数mother表示“一个孩子”的“一个妈妈”即one child对应one mother

备注(2):their mother 强调“个体”即他们各自的妈妈(每个孩子只有1个妈妈)

【2】The teacher asked the children to tell the good news to their mothers.

备注(1):用复数mothers表示“很多孩子”的“很多个妈妈”many children对应many mothers

备注(2):their mothers 强调“整体”即他们所有人的妈妈(多个妈妈)

更多类似于网友提供的英语句子如下

【1】Children were taken forcibly from their mothers.  【强调整体(所有人)】

孩子们被强行地从他们母亲身边夺走.

【2】He tried to turn the children against their mother. 【强调个体(单个人)】

他试图使孩子们反抗他们的母亲.