John Williams
"He is working" implies that "he" is working right now, so far as you know. "He has been working" does imply that "he" was working, perhaps for a while, but it doesn't say specifically that "he" is still working right now.
no. you see it working right now.
It means that that person was working the other one means they are working right now
scientist right now are working on it
pop and me
you are working on one right now!!
The composer? I'm quite sure he's very much alive right NOW.
Not right now but will be very soon!
The composer is Bedrich Smetana, of Bohemia, now the Czech Republic.
Right now she is working on the show Pretty Little Liars!
it means are you still working right now.
nothing! but they are working on something right now