1. I'm so depressed. 我很郁闷。
2. I feel so upset. 我觉得很沮丧。
3. I'm in a bad mood today. / I'm moody today. 我今天心情不好。
4. I feel kind of blue today. 我今天有点「郁闷」。
5. I feel low today. 我今天心情（有点）低落。
6. I'm so down. 我心情很低落。
7. I'm a bit down in the mouth today. 我今天有点闷闷不乐的。
8. I've been down in the dumps recently. 我最近很「郁闷」。
9. I can't put my finger on what's wrong. 我不晓得什么地方不对劲儿。
10. Sorry, I got up on the wrong side of the bed today. 抱歉，我今天心情不好。