如何用英语拒绝别人?

1. I am sorry to turn you down.

我很抱歉必须拒绝你.

2. I am not interested.

我没有兴趣.

3. I'll think about it.

我要考虑看看.

4. I can't afford it

我付不起.

5. I can't handle it.

我应付不来.

6. I am really not in the mood.

我真的没有什么心情.

7. There is nothing to talk about.

没什么好说的.

8. I really want to, but I got hundreds of things to do.

我想去, 可是我有好多好多事情要做.

9. I don't want to go and that's that.

我不想去, 就是这样.

10. That's enough, anymore is just overkill.

那就够了, 再多一点也是多余的.