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。

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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。

youdao

The incident put her in a bad mood.

这件事弄得她心情很不好。

《牛津词典》

If you're tired or stressed out or in a bad mood or, you know, full of rage.

如果你很累、压力很大、心情不好，或是很愤怒的时候，

会打棒球吗？ - SpeakingMax英语口语达人

On the occasion where Miller was in a bad mood, he would slowly sip a neat Old Grand Dad.

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It's like when someone sends you a perfectly nice e-mail but you're in a bad mood so it appears rude.

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Concentrating debt auctions on fewer, pre-announced dates risks them falling on days when the markets are in a bad mood.

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