I hate to tell you this, but tomorrow's your last day.

我对告诉你这个很遗憾，但明天是你最后一天了。

《柯林斯英汉双解大词典》

I hate to tell you this, but I can't seem to find them.

我真不想告诉你，但是我好像找不到它们。

youdao

I hate to disturb you, but I have to tell you something important.

我讨厌打搅你，但是，我必须告诉你一些重要的事情。

youdao