同学你好，该知识点来自沪江网校《英语零基础直达大学六级【双11专享班】》的课程，想要更系统的学习，欢迎进入课程学习。不仅可以和更多的同学一起学习，而且还有老师、助教随时的学习指导和知识点解答哦。

同学你好~
如果“one of the+复数名词+定语从句”这类结构的one之前有the only, the very 等修饰，则其中的定语从句通常被认为是修饰one的，所以，若引导定语从句的关系代词在定语从句中作主语，则定语从句的谓语动词通常用单数。

Tom is one of the boys who were praised by the headmaster yesterday.
汤姆是被校长表扬的男孩中的一个。

Tom is the only one of the boys who was praised by the headmaster yesterday.
在那些孩子中，汤姆是受到校长表扬的唯一一个。


祝同学学习进步~