Question

There once was a dragon, his name was Pete. Pete has the ability to turn human and he was the one and only dragon who could do that, but the other dragons didn’t know, which even means his best friend doesn’t know and Pete knows the dragons didn’t like human for what they’ve done to the dragons King and Queen (the humans kidnapped them) So if the dragons ever see a human they would masticate them whole! But one day Pete thought to open up to his friend about his ability and boy, Pete made the worst decision in his whole life :( Pete walked up to his best friend Pat and said “Hey Pat, I’m going to show you my ability”, Pat was confused by what Pete meant by "ability" but he said “Alright!” So Pete transformed into human and Pat was shocked. Pat said “Ahhh! HUMAN” the other dragons saw Pete and chomped Pete up, so moral of the story if you’re a dragon and can form into human… Don’t for your own sake.

(Is there any punctuation I should put correctly? The teacher said to write a story following these stuff in the image)

Answer 1

Drop the ":(" as no English author would use emotocons in their story, unless its a children's book.

It also looks like you have a few grammatical errors in there.

"into human" should be "in to a human"

"so moral of the story if you’re a dragon" should be "the story is if you’re a dragon"

"chomped Pete up, so moral of the story" should be "so the moral of the story"

"didn’t like human for what they’ve done to" should be "didn't like humans for what they’ve done to"