引导定语从句的关系代词常见的有that, which,who whom等。关系代词放在先行词和定语从句之间， 起连接作用，同时又作定语从句的一个成份。 eg. The man (that/who told us a funny story) is in the next room.

主语

I lost the book(( that/which ) you gave me).

宾语