Vous n’y êtes pas = You do not understand it; “You are out of it.”
J’y suis, j’y reste = Here I am, here I stop.
[Marshal MacMahon in the trenches before the Malakoff, Sept. 9, 1855.]
Cette fois, ça y est = Now it is done, and no mistake.
Je n’en suis plus = I am no longer one of the party; I no longer belong to it.
Il n’en a rien été = Nothing came of it.
Il en a été pour sa peine = He had his trouble for nothing.
Il en sera ce qu’il vous plaira = It shall be just as you please.
Je ne sais plus où j’en suis = 1. I have lost the place where I left off (in reading, etc.). 2. I do not know what I am about.