I have seen the sentence "they can play tennis with you tomorrow. They're not working. " in an essay.
"they're not working." means what?
it probably means "they don't have to work tomorrow". There are two features that you must recognise in "they're not working". The first is the use of the present tense with future meaning; and the second is that "tomorrow" carries over from the previous sentence - it's understood.
another possibility is that it means "they are temporarily or permanently out of work at the moment, so they are free to play".
there are two explanations that i guess below.
1. According an arrangement, they will not work tomorrow. yes, most likely.
2. The arrangement, namely that they will work tomorrow, doesn't exist.
yes, if they don't have a job.
which explanation is right?
neither explanation is "right". It depends on the context. All you can infer is that, for some reason, they do not have to work tomorrow.
thanks a lot in advance.