401. Just now for Presently, etc
(X) The messenger will arrive just now.
(O) The messenger will arrive presently.
If we are speaking of a near and immediate future time,
we must use presently, immediately, in a minute, or soon.
"Just now" refers to present or past time, and not to future time:
He's not at home just now (= at this moment).
He left just now (= a little time ago).
402. Presently for At present
(X) His uncle is in London presently.
(O) His uncle is in London at present.
"At present" and "presently" are not synonymous.
At present means now, but presently means soon:
She will come back presently (= soon).
403. Scarcely for Rarely
(X) Zoe scarcely comes to see me now.
(O) Zoe rarely comes to see me now.
Scarcely isn't synonymous with rarely. Rarely means not often, scarcely means not quite:
I had scarcely finished when he came.