1·People are ungrateful when in a bad mood.
心情不好的时候，人们就不会表达感激之情。
2·They helped 15 to 20 people in a bad mood.
他们帮助了15到20个心情不好的人。
3·It is widely accepted that having not enough sleep can leave people in a bad mood.
人们普遍认为睡眠不足会让人心情不好。
4·The incident put her in a bad mood.
这件事弄得她心情很不好。
—— 《牛津词典》
5·She can be a real pain when she's in a bad mood.
她脾气不好时，真是令人头痛。
—— 《牛津词典》
6·It put me in a bad mood for the rest of the day.
那事让我整天再也没了好心情。
—— 《牛津词典》
7·Every time they went dancing they ended up in a bad mood.
每次他们去跳舞，到头来总是扫兴而归。
—— 《柯林斯英汉双解大词典》
8·Rod must be in a bad mood today.
罗德今天一定心情很不好。
9·They arrive at the class in a bad mood, and they leave with a smile.
他们带着坏心情来上课，然后面带微笑离开。
10·She was in a bad mood yesterday.
她昨天不爽。
—— 《新英汉大辞典》