1、第一个，I feel blue.例句1；Anyway, he's been feeling a little blue。例句2；I never account for it to anybody when I feel blue.
3、第三，i'm feeling down例句1；cause he's been feeling down today.例句2，Oh, love you too, I'm sorry you're feeling down.
5、第五个，down in the mouth例句1；I was surprised to see her looking so down in the mouth.例句2,Poor Mary. She's been terribly down in the mouth lately.
