求英语达人 帮看看有没有语法错误
Once upon a time,a clever boy called Sima Guang.
One day,he played hide and seek with his friends in the yard.
There is a big water tank in the yard,a boy climb up the tree,above the tank.
Suddenly,The boy fell into the tank .
Sima Guang picked up a big rock,broke the water tank.
The water went out,the boy was saved!