who是不是定语从句中的关系词？

Question

如题所述

Answer 1

当先行词是表示人或者活物(有情感时)who可以引导定语从句，属于关系代词。

Answer 2

您好，您的这个句子有点问题，因为 the only one（唯一的一个）不能和 one of the students（多个学生中的一个）共同使用，所以句子可以是：

1）Tom was the only one who was late this morning.
who 引导定语从句修饰 one（作名词）

2）Tom was the only student who was late this morning.
who 引导定语从句修饰 student

3）Tom was one of the students who was late this morning.
who 引导定语从句修饰 one