如何礼貌地用英语拒绝别人?

Express Appreciation First 首先表示感谢

Thank you so much for considering me, but...

非常感谢您考虑我，但是...

Use Softening Words 使用柔和的词语

I appreciate the offer/opportunity, but...

我很感谢您的提议/机会，但是...

Give a Reason (if appropriate) 给出原因（如适用）

Unfortunately, I have prior commitments that day.

不幸的是，那天我有先前的安排。

Offer an Alternative (if possible) 提供替代方案（如果可能）

I'm not available this week, but I could do it next week.

这周我没空，但我下周可以。

Be Firm but Polite  坚定但有礼貌

I'm afraid I won't be able to help this time.

恐怕这次我不能帮忙了。

Close on a Positive Note 结尾加以肯定

Thanks again for thinking of me!

再次感谢您考虑我！

示例

Thank you for inviting me to the party, but I already have plans that evening.

谢谢邀请我参加聚会，但那天晚上我已经有安排了。

I appreciate you thinking of me for this project, but I'm currently fully committed to other tasks.

感谢您考虑我参与这个项目，但我目前已经全身心投入到其他任务中了。

Thanks for offering to help, but I think I can manage this on my own.

谢谢您提供帮助的意愿，但我想我可以自己处理这件事情。
 

通过以上策略和短语，你可以在礼貌地拒绝或婉拒请求时保持良好的关系和清晰的沟通。练习这些表达方式，能够更自信地用英语礼貌地拒绝别人的请求。