What are differences between "continue" and "keep on"?
In terms of usages please. Meanwhile, please also introduce if any other words having same meaning and usage. Mtks.

Question

Answer

Both "continue" and "keep on" mean the same thing, but "continue" is more formal.  "Keep on" is more slang, or informal and you would only use it to speak to friends to say something like "keep on working" or "keep on trying."  
"Keep going," and "Go on," also mean the same thing, but they, too, are more informal than "continue."

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