1. i'm so depressed. 我很鬱悶。
2. i feel so upset. 我覺得很沮喪。
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. 我今天有點「鬱悶」。
5. i feel low today. 我今天心情（有點）低落。
6. i'm so down. 我心情很低落。
7. i'm a bit down in the mouth today. 我今天有點悶悶不樂的。
8. i've been down in the dumps recently. 我最近很「鬱悶」。
9. i can't put my finger on what's wrong. 我不曉得什麼地方不對勁兒。
10. sorry, i got up on the wrong side of the bed today. 抱歉，我今天心情不好。