写一篇关于朋友或同学的英语作文，你可以遵循以下步骤和结构：

开头

简要介绍你要描述的人，比如你的名字、你们是如何成为朋友的，以及你们之间的关系。

描述人物特征

外貌：身高、体重、体型、眼睛颜色、头发颜色等。

性格：友好、害羞、聪明、勤奋等。

兴趣爱好：喜欢的音乐、电影、书籍、运动等。

日常生活：学习习惯、生活方式、周末活动等。

具体例子

举例说明你们共同经历的事情，或者他们如何帮助你。

结尾

总结你们的关系，以及你为什么喜欢和他们在一起。

下面是一个简单的例子：

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Title: My Good Friend

My name is [Your Name], and I have a good friend named [Friend's Name]. We became friends in the first grade, and we are still close to this day.

[Friend's Name] is a beautiful girl with big eyes and long hair. She is tall and thin, and she always wears a bright smile. She is very kind and always ready to help her friends. Her favorite hobbies are listening to music and reading books. We often listen to music together and share our favorite books.

One of the things I admire most about [Friend's Name] is her enthusiasm. She is always full of energy and never gives up easily. She is also very forgetful, but she always apologizes when she forgets something. Despite her forgetfulness, she is an amazing friend and I cherish our friendship very much.

We usually go to school together and sometimes we go shopping on the weekends. We have many plans for the future, and I am sure our friendship will continue to grow stronger.

In conclusion, [Friend's Name] is not just a friend to me； she is a true companion. I am grateful for having her in my life and I look forward to many more years of friendship with her.

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记得根据你具体的朋友或同学的特点来调整上述模板中的内容，使作文更加个性化和真实。