以下是一个六年级上册英语第一单元的小故事，希望能够帮助到您：

Once upon a time, there was a little girl named Lily. She was very shy and nervous about speaking English. One day, she decided to speak to a native English speaker to improve her language skills.

Lily walked up to an old man named Mr. Smith. He was a college professor and spoke English very well. When Lily told him that she wanted to practice speaking English, he agreed to help her.

For the next few weeks, Lily met with Mr. Smith every day. He helped her practice speaking by asking her questions and making her speak in complete sentences. Gradually, Lily felt more confident speaking English.

One day, Mr. Smith asked Lily to speak without interruption for three minutes about anything she liked. Lily thought for a moment and then began to speak about her favorite subject - math! She spoke about how she loved solving difficult math problems and how it made her feel smart.

Mr. Smith was impressed by how well Lily spoke and encouraged her to continue speaking English. From then on, Lily became more confident and spoke English fluently.

故事大意：

从前有一个小女孩叫莉莉，她很害羞，一讲英语就紧张。有一天，她决定和一个以英语为母语的人说话来提高她的英语水平。

莉莉走到一个叫史密斯先生的老人面前。他是一名大学教授，英语说得非常好。当莉莉告诉他她想练习说英语时，他同意帮助她。

在接下来的几周里，莉莉每天都和史密斯先生见面。他通过提问和让她说完整的句子来帮助她练习说英语。渐渐地，莉莉说英语时感到更加自信。

有一天，史密斯先生让莉莉连续讲三分钟关于任何她喜欢的话题。莉莉想了一会儿，然后开始讲她最喜欢的科目——数学！她谈到她如何喜欢解决复杂的数学问题以及这让她感觉多么聪明。

史密斯先生对莉莉的演讲能力印象深刻，鼓励她继续说英语。从那时起，莉莉变得更加自信，英语说得流利自如。