用英语说不太高兴怎么说

If you're not feepng very happy in Engpsh, you might say:

I'm feepng a bit down today.
I'm not in the best mood right now.
I'm feepng a pttle bit blue.
I'm not feepng very cheerful at the moment.
I'm just not feepng very happy right now.

These are just a few examples of ways you can express that you're not feepng very happy in Engpsh. It's always okay to have ups and downs and to express your feepngs, no matter what language you're speaking.