We use One to refer people in general.
Differences between One, you and they. Examples:
● Does one eat donut burgers in the US? - It includes the speaker, and it’s more formal.
● Do you eat donut burgers in the US? - It’s less formal and assumes the listener is from the US.
● Do they eat donut burgers in the US? - Refers to other
We use “One’s” to indicate that something belongs or relates to people in general. Example:
● One’s health is much more important than anything else.
● One shouldn’t use the phone while is driving.
● One’s responsibility is to ensure the safety of the others while is operating a motorized vehicle.
● One should take care of its health.
● We are free to choose what one want to do in one’s free time.