家庭聚会、考试等突发情况
关于不能赴约的英语作文写作，以下是常见的理由分类及示例，供参考：
一、家庭相关原因
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家庭聚会/活动冲突
示例：
"I'm sorry, but I can't attend your party tomorrow because my cousin Peter is returning from Beijing, and we have a family reunion to attend"
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亲属健康问题
示例：
"I caught a bad cold with a fever today and the doctor advised me to rest for 3 days. I'm afraid I can't meet you tomorrow"
二、个人突发情况
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考试/学业压力
示例：
"I regret to inform you that I have to take an unexpected English exam tomorrow, which conflicts with your scheduled time"
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紧急工作/任务
示例：
"I have been assigned an urgent project at work that requires my immediate attention, and I can't reschedule"
三、其他常见原因
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天气/交通问题
示例：
"Due to severe weather conditions, the planned outdoor activity has to be canceled. I hope we can reschedule"
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计划变更
示例：
"I previously thought we could meet, but my friend suddenly had to move in last minute. I'm really sorry"
写作建议
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开头表达歉意 ：使用"regretfully"、"terribly sorry"等词汇明确表达歉意。
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说明具体原因 ：简洁明了地解释无法赴约的直接原因，避免模糊表述。
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提出替代方案 ：主动提出另约时间或补偿措施，如"Let's reschedule for next week"或"Can we meet at another venue"。
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保持礼貌 ：使用"had hoped"、"I understand your disappointment"等语句缓解对方情绪。
通过以上分类和示例，可根据实际情况灵活调整内容，使作文既符合英语表达习惯，又能有效传达歉意。