当引导定语从句的关系代词在从句中作主语时，定语从句中的谓语动词的数的形式应与先行词保持一致。

　　1.one of+复数名词+关系代词+复数动词

　　He is one of the students who pass the exam.

　　他是通过考试的学生中的一员。

　　2.the only one of+复数名词+关系代词+单数动词

　　He is the only one of the students who passes the exam.

　　他是唯一通过考试的学生。

　　3.当关系代词as与which引导非限定性定语从句，修饰主句内容时，若as与which作主语，则从句的谓语动词用单数形式。

　　As is known to all，the earth goes around the sun.

　　众所周知，地球绕着太阳转。

　　He has passed the college entrance examination， which makes his parents quite happy.

　　他通过了大学入学考试，这使他的父母非常高兴。

　　4.其他情况

　　I，who am your teacher，will try my best to help you.

　　我，你的老师，将尽力帮你。

　　Have you heard of the persons and things that are being talked about?

　　你听说过正在谈论的这些人和事吗?