在大班课上进行发言时，留学生可以遵循以下结构和要点：

开场问候

使用礼貌的语言向听众问好，例如：“Good morning/afternoon/evening, everyone.”

自我介绍

简要介绍自己的背景，包括国籍、学校、专业等，例如：“My name is [Your Name]. I am from [Your Country]. I am studying [Your Major] at [Your University].”

感谢致辞

对主办方、教师、同学表示感谢，例如：“Thank you for having me today.”

表达学习目的和期待

说明选择留学的原因，包括学术兴趣、文化交流、职业发展等，例如：“I am here because I am passionate about [Specific Field of Study] and I am eager to experience the cultural exchange and professional opportunities that studying abroad offers.”

分享个人经历或感受

可以分享留学生活中的体验、挑战和收获，例如：“During my studies abroad, I have faced many challenges, but I have also gained invaluable experiences and made many friends.”

鼓励和建议

鼓励新留学生适应新环境，努力学习，多交流，并给出提高语言能力和专业技能的建议，例如：“I encourage new students to be proactive in class, participate in discussions, and take advantage of the resources available to them.”

结束语

总结发言，表达对未来学习和生活的美好祝愿，例如：“In conclusion, I am excited about the future and look forward to learning and growing with all of you.”

此外，在发言过程中，留学生应注意使用清晰、准确的语言，保持自信和礼貌的态度。可以通过多听多说、参加英语辩论或演讲等活动来提高英语表达的自信度和流利度。