请问定语从句的所有引导词有哪些？怎样用？请详细些，谢谢！

1.that=which用于一般的定语从句中
eg:A book that I like it very much.=A book which I like it very much.
2.in which=where用于先行词为地点的定语从句中
eg:A small village where I will spend time with my parents.
3.who用于先行词为人的定语从句中
eg:A person who I am talking with is my mom.

1.that 除了非限定性定语从句，基本上都可以用
2.which 可用于限定性和非限定性定语从句
3.who 用于限定人物的从句。