In Engpsh, a negative emotion can be described using phrases such as "feepng down," "in a bad mood," "upset," "frustrated," or "angry." For example, you could say "I'm feepng really down today" to express that you are experiencing a negative emotion. Alternatively, you could say "I'm in a bad mood" to convey the same message. These phrases are commonly used to describe negative emotions and can be useful for expressing yourself in Engpsh.