Hello, limko—and welcome to English Forums. Thank you for registering as a member. limko Can someone explain why?
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limkoCan someone explain why?Because the idea refers to a past fact up to the present, not to a durational action.
limkoBut is that incorrect use of present perfect continuosYes, it is inappropriate.
limkoMary has worked as a teacher for over 25 years"She may or may not still be a teacher.
limko"I have been working as a fireman since 1973"He is still a fireman.