I've got some bad news.
我有一些坏消息。

I've got some bad news(about...)
我有一些(关于...的)坏消息。
I've got some bad news about math examination.
我有关于数学测试方面的坏消息。
I've got some bad news about the book you lent me.It was confiscated by the teacher
我有一个坏消息是关于你借给我的书的，被老师没收了。

A:I've got some bad news about the bike you lent me...
我有一个坏消息。是关于你借给我的自行车。
B:What's that?
怎么了？
A:I fell on the way to school,and your bike got scratched.I'm really sorry.
我在去学校的路上摔倒了，你的自行车划伤了。真的很抱歉。
B:Don't worry about it.It's not new.It already has a few scratches.Did you get hurt?
别担心，又不是新自行车。而且它上面本来就有 很多划痕了。你伤着了没有？
A:No,thank you.
没有，谢谢关心。
B:That's the most important thing.
这才是最重要的。
A:It's kind of you to say so.I feel a little stupid.
你能这么说真是太好了。我感觉自己有点蠢。
B:Forget about it.
忘了这事吧。
A:When you lent me the bike it looked brand-new,almost,anyway.
你借给我自行车的时候，它看上去是全新的，不管怎样，也差不多是全新的。
B:Maybe,but really I've fallen a couple of times and it's been hit once or twice as well.
也许吧，不过我真的摔过两三次，另外它也被撞过一两次呢。
A:I appreciate that.Thank you.
你这么说我真感谢。谢谢你了。