英文表達「改天」可以用 「change it to another day」。

另外，「take a rain check」也可以代表改期或下次再見的意思。拒絕邀請時可以禮貌地回答「Thank you for the invitation, but I have a prior engagement.」或者「Sorry, I won’t be able to make it. Another time would be great, though!」 對于請求的拒絕，可以回答「Why not have a go yourself, and give me a shout if you need help?」或者「Sorry, I just can’t do this. Maybe Emma can help you.」