just now

[Mike12345]

I'm working just now.

Teachers, I read the sentence "I'm working just now." while reading a grammar book named Oxford English Grammar Course, which was written by Michael Swan and Catherine Walter. I think the sentence is wrong, in that "just now" is for past not now.But it's a famous book, so I am not sure whether my opinion is right or not. What do you think?

 

[emsr2d2]

Sometimes, "just now" is used to mean "right now". That's the case in that example. The tense in the rest of the sentence will tell you whether "just now" means "now" or "a few moments ago".

I'm working just now (but I'll be free in five minutes).
I was working just now (so I'm free now).
I saw a dog just now (but I can't see it any more).
I'm being pinned to the floor by a dog just now (so I can't get up and help with the washing up!)