以下是一個四字成語故事的英文版：
成語故事：畫蛇添足
英文版：The story of "Drawing Snakes with Feet"
Once upon a time, there was a king who had a beautiful cup made of gold. He wanted to share it with his friends, so he invited them to a party. Each guest was given a golden cup, and they all drank and laughed together. After the party, one of the guests accidentally knocked over the king's precious cup, breaking it into pieces.
The guest who broke the cup was very sorry and offered to make a new one for the king. He spent all night painting a beautiful snake on a piece of wood, hoping to impress the king. However, he painted the snake with too many feet, making it look ridiculous.
When he presented the new cup to the king, everyone laughed at him. They said that he had gone too far and ruined the beautiful snake by adding extra feet. The lesson from this story is that we should not add unnecessary details or ideas to something that is already complete, as it can only make things worse.
希望這個故事能夠幫助你理解四字成語故事，並學習相關的英文表達。