The English version of the story "The Mermaid" by Hans Christian Andersen is as follows:
Once upon a time there was a mermaid who had a long, beautiful, and silvery hair. She was very beautiful and had a heart of gold. She loved to swim and play in the ocean and dreamed of becoming a human. She wanted to feel the joy of love and happiness that humans had.
One day, the mermaid found a magic fish and asked it to turn her into a human. The fish granted her wish and she soon found herself as a beautiful young woman on land. She enjoyed the sunshine, flowers, and animals that she had never seen before. However, she missed her mermaids friends and the ocean life she knew so well.
The mermaid soon fell in love with a handsome young man, but she soon realized that humans were not what she had imagined. They were selfish and lacked the natural kindness and purity that mermaids had. She began to long for her carefree life as a mermaid, with all its dangers and excitement.
She soon realized that she had given up too much and decided to return to the ocean. As she swam back to her family, she cried tears of regret and sadness. But then she realized that she had learned an important lesson about love and life, and that she had found something more valuable than anything she could have imagined.
The story ends with the mermaid singing a beautiful song about the beauty of life and the joy of returning to her natural world.
This is the basic storyline of "The Mermaid" by Hans Christian Andersen in English. However, there are various adaptations and retellings of this story in different languages and cultures, so it may vary slightly depending on the version you are familiar with.