關於英文keep going與keep on going的意思及用法差別？

Longman 的解釋：
keep doing something = keep on doing something, on為可有可無 – 意思(繼續作某事)完全一樣 – 重點是，keep 後動詞需用 –ing form，不能用不定詞(不要背，只要瞭解keep 本身之意義就是持續，後面動詞與keep應無時差之概念去理解到,自己認為keep所解動詞該是 -ing form – 而不是背來的)
以下為 copy 自Longman
continue doing something [intransitive] (also keep on) to continue doing something or to do the same thing many times
keep (on) doing something
I keep thinking about Joe, all alone in that place.
I keep telling you, but you won’t listen!
She pretended not to hear, and kept on walking.
Grammar
Keep is followed by an -ing form, not an infinitive. You say:
He kept talking to me.
✗Don’t say: He kept to talk to me.

keep going---not stop ; not give up ; continue to function in livehood (as somebody said)eg:-Keep going although life becomes weary of living alone in body and mind.

keep on going-----going=doing something----keep on doing something = continue; persist;- eg:-Why do the dogs in new year keep on barking ?Don't keep on asking silly questions in the Post. Keep on working; keep on doing, keep on going although you are tired out (as somebody said in an uninterested way)