1. Somebody has told me about that.
已经有人告诉我这事了。
2. Yes, I know that, thanks.
是的，这事我知道，谢谢。
3. Yes, I've heard about the news.
是的，我已听说这消息了。
4. I'm afraid I don't know.
恐怕我不知道。
5. I've got no idea.
我一点也不知道。
非正式场合表达法
1. So I hear. 我听说是这样的。
2. That's what I heard. 我是这么听说的。
3. Don't ask me. 我不知道。
4. I haven't got the slightest idea. 我一点也不.知道。
5. Sorry, I really don't know. 对不起，我真的不知道。
正式场合表达法
1. For all I know, he may have left for Canada.
就我所知，他可能已去了加拿大。
2. I am fully aware of that.
我完全知道这事。
3. I have to admit I don't know much about foreign affairs.
我得承认我对外交事务知之甚少。
4. I'm afraid I have to say I know very little about computers.
恐怕我得承认对计算机我所知甚微。
5. I'm sorry to say that I am quite in the dark about it.
很遗憾，我不知道这件事。
课后题目: 学完后，你知道"That's what I heard." 这句话的意思吗？