写上课后的英语作文时，可以从以下几个方面入手：

描述课堂结束后的情景

可以描述同学们下课后的反应，比如有的同学跳起来、有的同学在聊天、有的同学在唱歌等。例如：“The bell rang and the class was over. Many classmates jumped up from their seats. The classroom became noisy. Some students went out of the classroom while talking and laughing. Two girls were singing on their seats. Some boys were telling jokes loudly. They were laughing together.”

表达课后活动

可以描述自己课后的活动，比如和同学聊天、做作业、参加社团活动等。例如：“After a long day of classes, homework, and extracurricular activities, my evenings are usually filled with a mix of relaxation, reflection, and productivity.”

分享个人感受

可以表达自己在课后学习中的收获或感悟，比如对某个知识点的理解、对学习方法的改进等。例如：“Study in Class and out of Class Our study can be divided into two parts: one is in class and the other is out of class. Both of them are important to students. They depend on each other.”

具体事件描述

可以描述课堂上发生的一个具体事件，比如老师布置的作业、课堂上的游戏等，并说明这个事件对自己的影响。例如：“Today, during English class, our teacher came in and asked us four groups to start a competition. We had to see which group could react the fastest and press the correct English word on the blackboard. The group with the most points would get an additional point. In the end, Group Two won with 13 points.”

结合以上几个方面，你可以写一篇关于上课后的英语作文。以下是一个示例：

---

After Class

The bell rang and the class was over. Many classmates jumped up from their seats. The classroom became noisy. Some students went out of the classroom while talking and laughing. Two girls were singing on their seats. Some boys were telling jokes loudly. They were laughing together.

After a long day of classes, homework, and extracurricular activities, my evenings are usually filled with a mix of relaxation, reflection, and productivity. I like to review the day's lessons and plan for the next day. Sometimes, I also spend some time chatting with friends or reading a book.

One of the best parts of the day is when we have a class competition. Today, during English class, our teacher asked us four groups to start a competition. We had to see which group could react the fastest and press the correct English word on the blackboard. The group with the most points would get an additional point. In the end, Group Two won with 13 points. This competition made us more focused and competitive in our studies.

---

希望这些建议能帮助你写出一篇优秀的上课后的英语作文!