对不起，我不能参加你的晚会。

I'm sorry that I can't come to your party.

youdao

我有事，不能参加你的晚会。

I have the matter, cannot attend your party.

youdao

很抱歉，我不能来参加你们的晚会了。

I'm sorry, I can't come to your party.

youdao

我很遗憾告诉你我不能去参加你的生日晚会了。

I regret to tell you that I can't go to your birth-day party.

youdao

恐怕明天我不能来参加你的生日晚会了。

I'm afraid I can't come to your birthday party tomorrow.

youdao

我太忙了不能来参加你的晚会。

I'm too busy to come to your party.

youdao

我很遗憾告诉你我不能去参加你的生日晚会了。

I regret to tell you that I cant go to your birthday party.

youdao

我很遗憾告诉你我不能去参加你的生日晚会了。

I regret to tell you that I cant go to your birthday party.

youdao