Making request
I want to travel to Japan, but I am afraid of going alone. (to a friend)
Peter, could you come with me?
You are carrying heavy bags and can't open the door. (to a passer-by)
Can you please open the door for me?
You are in an unknown town, looking for the post office. (to a local inhabitant)
Excuse me, could you possibly show me the way to the post office, please?