撰写英文留学生邮件时，请遵循以下格式和要点：

邮件结构

主题（Subject）

简洁明了，直接表达邮件的核心内容。

例如：“Request for Extension on Assignment Submission”。

称呼（Greeting）

根据收件人身份使用适当的称呼，如“Dear Professor Smith”或“Hi John”。

邮件正文（Purpose of Your Email）

开头段：自我介绍，说明写信原因。

正文内容：简明扼要地阐述请求、问题或信息。

如果有多个问题或要点，使用项目符号或编号列表。

结束语（Closing）

表达感谢或期待回复，如“Thank you for your time”或“Please let me know if you have any questions”。

落款（Signature）

包括你的全名、联系信息以及可能的签名。

邮件内容要点

完整性：提供完整信息，如姓名、学号等。

简洁性：邮件内容要简洁，避免冗长。

针对性：确保邮件内容与收件人相关，避免发送无关信息。

示例邮件

Subject: Request for Extension on Assignment Submission

Dear Professor [Last Name],

I hope this email finds you well. My name is [Your First Name] from your [Course Name] class. I am writing to request an extension on the submission deadline for my current assignment. Due to [brief explanation of personal or academic situation], I am unable to complete the assignment by the original deadline.

I have attached my progress so far and will continue to work diligently to meet the new deadline. I believe this extension is justified and will not affect my performance in the course.

Thank you for your consideration and understanding. Please let me know if you require any further information.

Best regards,

[Your First Name]

[Your Contact Information]

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请根据具体情况调整邮件内容，确保信息准确无误，并保持礼貌和专业的语气。