ใช้แทนนามที่เป็นบุคคลและบุคคลนั้นจะต้องเป็นผู้กระทำด้วย เช่น The man who came here last week is my cousin. ชายผู้ซึ่งมาที่นี่เมื่อสัปดาห์ที่แล้วเป็นลูกพี่ลูกน้องของฉัน.
Use instead of a person, and that person must be acting like The man who came here last week is my male cousin, who came here. last week, then is my cousin.
Using the name of a person and that person must be dealt with, such as The man who came here last week is my cousin. Man who came here last week, is my cousin.
Instead of the name as a person and that person will need to be done, such as The man who came here last week is my cousin man which came last week is my cousin.