How does Robinson Crusoe tame Friday?

First of all, it is to use rifles as a tool to conquer Friday, and to make Friday lose his freedom by force and be willing to surrender to him. Rifle is a new thing for Friday, so when I see Robinson holding a rifle on Friday, I will naturally be afraid and willing to follow his command. When he lost his freedom on Friday, Robinson began to consciously train and cultivate his new ideas and culture, which is also described in the novel. Robinson teaches English and manners on Fridays. "For convenience, I taught him the pronunciation of' Master' so that he would know what to call it later. I named Friday to let him know that I saved his life."