Can I use just with present continuous as in:
Mother: We are running late for dinner, where are you right now? Son: I am just getting home.
Friend A: Did you finish the last answer? Friend B: I was just finishing but the examiner snatched my copy.
Father: Have you finished your homework? Son: No, dad, I am just starting it, I need one more hour.
Are these uses of just grammartical and idiomatic?
I am a non native learner.
Thank you.
"just" has quite a lot of meanings and nuances in different contexts. Yes, it can definitely go with the progressive, but there is a point at which you must understand whether it carries a meaning clear to the reader or the listener.
I am not a native speaker, but in my opinion the first sentence is not quite idiomatic, but still correct, since "just" here may well be switched by "only" and carry the following meaning:
This goes better without any extra adverbs.
The other two sentences are perfectly fine by me.
The "just" there says "exactly/right at the moment/at this very moment" which goes well with the portrayed meaning.
