I'm just folk.I have mood

I'm just folk.I have mood I‘m just folk.I have mood swings. I'm just folk.I have mood swings. I'm just folk.I have mood swings到底该不该在folk前加a? I am just folk .I have mood Swins I'm have a bad mood还是I'm in bad mood?还是都行 I'm in the mood why sometime I have a bad mood? I'm in a mood today. I’m in the mood for French i'm in good mood now I am in a good mood,bad mood I was there.Your attention to m