定语从句中,由关系代词who 做主语时,何时用单数?He is one of the scientists who are famous.
问题描述：
定语从句中,由关系代词who 做主语时,何时用单数?He is one of the scientists who are famous.
He is the only one of the students who does well in his subjects.
答
这里不是看who,而是看前面的one of...和the only one of...如果句中有one of...那么定语从句的先行词就是one of后面的那个复数名词(one of后面接名称的复数形式),那么定语从句的谓语就用复数;至于the only one of...这个结构强调的是the only one,是一个单数形式,因此定语从句的谓语就用单数.