英语二材料作文的写作步骤如下：

概括材料

用30-50个词概括材料的主要内容，包括主题和关键信息。

表明观点

在90-100个词内明确表达自己的观点。主题句要简洁明了，支撑句要提供至少两个理由或例子来支持你的观点。

得出结论/提出建议/表明希望

用30-50个词总结观点，可以提出建议、表达愿望或展望未来。

示例结构

总起句：

Recently, a great number of American and British citizens have been subject to the discussion of children's addiction to electronic products.

描写句：

The past few months have witnessed a great concern about and even a heated debate on this issue.

主题句：

In my opinion, the excessive use of electronic products by children poses significant health risks and should be addressed urgently.

支撑句：

Firstly, prolonged screen time can lead to physical health problems such as obesity and eye strain. Secondly, it may affect children's mental development and social skills.

建议句：

Therefore, it is essential to promote healthy habits and limit children's screen time. Schools and parents should work together to create a balanced environment for their growth.

写作方法

使用图表：

如果材料中包含图表，第一段应描述图表内容，使用动态描述词如"successfully arouses our curiosity"、"witnessed some changes"等。

引用名言：

可以引用名人名言或谚语来增强文章的说服力。

注意语言：

使用恰当的连接词如"however"、"therefore"、"in addition"等，使文章逻辑清晰。

避免硬套模板：

虽然模板可以帮助你快速构建文章结构，但应避免完全依赖模板，要灵活运用，使文章更具个性和原创性。

通过以上步骤和方法，你可以有效地撰写一篇结构清晰、内容充实的英语二材料作文。