Hi,
In the key of Cmaj, in a ii(Dm) V(G) I(C) progression, with a harmony line of E, (which would be a 9th in the Dm chord), C, (which would be a sus 4 in the C chord), and B, (which would be the major 7th in the C chord), could you call the middle note, the C, a passing note?
Thanks,
Gerald.