I am confused about the use of the present perfect continuous and "all day". If I say:
"I have been working all day and I am really tired now", to me it can mean both that I am still working or that I have recently stopped working for the day.
I have read that the expression can only be used to convey that I have stopped working for the day and can't be used if I am still working. In that case I would have to say "I have been working for hours" or "since this morning", for example.
Is this true?