Let’s look at the root word ‘shame’ and explore its common uses.
Shame = sad feeling, guilt, or embarrassment.
I’m ashamed (of you/us/myself) = I’m embarrassed and perhaps dishonored.
“I’m ashamed to admit that it was me who stole the winning lotto ticket from you.”
Shame on you! = Scolding another person for a shameful act. The meaning is you should feel shame and embarrassment/regret for whatever you just did.
“I see that you have been gambling away all our money again! Shame on you!”
Shameless = no shame when they should have/feel some. Opposite of shameful.
“The criminal smiled shamelessly in court as the victims read their impact statements.”
It’s (such) a shame= It’s too bad, it’s a pity. Not necessarily meant to embarrass anyone; can be used just to politely express disappointment.
“It’s a shame you can’t stay longer and watch the UFC fights tonight with us. We’ll miss you.”
“It’s a shame you’re not legal drinking age yet, but next year we can party together!”
“It’s a real shame that you feel you are entitled to better service than us.” (Meant to embarrass or shame someone).
It’s so shame = This phrase is grammatically incorrect! Do not use it.
Try them out!