写英语建议作文时，可以遵循以下结构和步骤：

开头

表达写信的目的。例如：“Dear [收件人姓名], I am writing to offer some suggestions regarding [主题].”

表达感谢

如果对方之前有请求你的帮助，可以表示感谢。例如：“I am very glad to receive your letter asking for my advice on [主题].”

提出问题或现状

简要描述你希望提出建议的背景或原因。例如：“I understand that [问题或现状], and I would like to suggest [建议].”

给出建议

列出你的建议，可以分点陈述。例如：

“Firstly, I suggest [建议一].”

“Secondly, I recommend [建议二].”

“Moreover, I believe [建议三].”

说明建议的好处

阐述你的建议可能带来的积极影响。例如：“I believe this kind of arrangement will [好处].”

结束语

表达期待对方考虑你的建议，并感谢对方花时间阅读你的信。例如：“I look forward to your consideration of my suggestions. Thank you for your time and attention. Yours sincerely.”

示例作文

保持健康的建议

Dear [收件人姓名],

I am writing to offer some suggestions regarding keeping healthy.

Firstly, we should keep a good mood. Keeping a good mood can make us healthy and wealthy. Secondly, we should have enough sleep every day. Don't forget to strengthen our health. Do please pay attention to these points, keeping a healthy body.

I believe these suggestions will be helpful to you. I look forward to your consideration of my suggestions. Thank you for your time and attention.

Yours sincerely,

[你的名字]

总结

通过以上步骤和示例，你可以撰写一篇结构清晰、内容完整的英语建议作文。确保你的建议明确、具体，并且能够清楚地表达其好处和重要性。