Hello!
A personal narrative does not necessarily have a specific way of writing. However, they always follow a basic guideline: an event, person, place, etc. that has meaning to you.
You may decide to choose the time you won an award, a family vacation, or simply a special day that you spent with your best friend.
A personal narrative always follows an experience of your own. It is best to describe the event/day/place/person with as much detail as possible in order for your readers to understand its significance.
I hope this answers your question!
