写作四级英语作文时，可以遵循以下步骤来提高你的写作水平和完成一篇优秀的作文：

1. 理解题目要求

仔细阅读题目，确保你完全理解了题目的要求和限制。四级作文通常要求考生在规定的时间内写出一篇大约100-120词的短文。

2. 确定主题和观点

根据题目要求，确定文章的主题和你要表达的主要观点。四级作文题目通常围绕社会热点、日常生活或个人经历等。

3. 规划文章结构

一篇典型的四级英语作文通常包括以下三个部分：

引言（Introduction）：简短地引入话题，通常是一句话。

正文（Body）：展开讨论，通常有两到三个段落，每个段落围绕一个主题展开。

结论（Conclusion）：总结观点，提出建议或展望未来。

4. 开头段（引言）

在开头段，你可以用以下方式开始：

引用名言或数据。

提出一个问题或假设。

直接陈述观点。

例如：

"The rapid development of technology has brought about significant changes in our lives."

5. 正文段

在正文段中，你可以：

阐述你的观点。

提供支持性的论据，如事实、例子或个人经历。

如果有必要，反驳反对意见。

每个段落通常遵循以下结构：

主旨句：段落的核心观点。

支持句：用事实、例子等来支持主旨句。

结论句：总结该段内容。

例如：

"Firstly, technology has made our lives more convenient. For instance, we can communicate with people across the world through social media platforms."

6. 结尾段（结论）

在结尾段，你可以：

总结全文的主要观点。

提出建议或展望未来。

强调文章的主题。

例如：

"In conclusion, while technology has its drawbacks, it has greatly improved our quality of life."

7. 审阅和修改

完成初稿后，仔细审阅你的作文，检查以下方面：

是否遵守了题目要求。

文章结构是否清晰。

语法和拼写错误。

文章的流畅性和连贯性。

8. 修改和完善

根据审阅的结果，对作文进行必要的修改和完善。

以下是一个简单的四级英语作文示例：

Title: The Impact of Online Learning

The rapid development of the Internet has brought about online learning, which has become increasingly popular in recent years.

There are several reasons for this phenomenon. Firstly, online learning offers flexibility and convenience. Students can study at their own pace and schedule, which is particularly beneficial for those who are working or have other commitments. Secondly, online learning provides access to a wide range of resources and experts, which can enhance the learning experience.

However, online learning also has its challenges. For example, some students may lack self-discipline and motivation, which can lead to a lack of focus and progress. Moreover, the lack of face-to-face interaction can hinder the development of communication skills.

In conclusion, online learning is a valuable tool that can improve education. To make the most of online learning, students need to be disciplined and proactive. Educational institutions should also provide proper guidance and support to ensure the effectiveness of online learning.

这个示例遵循了上述写作步骤，包括引言、正文和结论，同时也考虑了文章的结构和内容的连贯性。