...and I do not agree that "now" does not refer to any point in time. To me "now" emphasises the immediacy of the imperative. If it softens "Listen please," it is because the imperative is even more immediate than the present.
Andy,
With all due respect to your genuinely wonderful analytic mind, which you have demonstrated hereabouts over and over again, I believe you're stretching a bit too far in this case. Taking your example:
Now, where was I?
I just do not see how the
Now stresses any immediacy. Leave it off, or replace it with "
OK", and the expression carries just about the same effect. If you really want to pick at it, there is an implicit meaning of, "Where did I leave off before?" It does not refer to "
NOW", but rather to a point before now. But I wouldn't even do that. I believe it is merely a
discourse marker, as metal56 (our resident discourse analyst) has labelled it, or a
conversation management tool, as I suggested before, that serves to guide the listener (of course, this would only be used in oral speech or in written dialog) back to the topic under discussion. It is a single lexical item, I would propose, without analyzable meaning, but with a function in the discourse.
Larry Latham