what was going on

Suddenly I didn't know what was going on.

Soudain, je ne savais plus ce qui se passait.

— Princess Mononoke (1997)

Am I the only one who didn't understand what was going on?

Suis-je le seul à ne pas avoir compris ce qui se passait ?

Didn't I say what was going on?

Je n’ai pas dit ce qui se passait ?

— GoodFellas (1990)

Everybody except me knew what was going on.

Tout le monde sauf moi savait ce qui se passait.

“Of course, they might get mercy, if they told us what was going on,” I added.

« Bien sûr, ils pourraient obtenir la clémence s’ils nous disaient ce qui se passait », ai-je ajouté.

I wasn't aware of what was going on.

Je n'étais pas au courant de ce qui se passait.

Didn't you realize what was going on?

Tu ne t'es pas rendu compte de ce qui se passait ?

— The Irony of Fate, or Enjoy Your Bath! (1976)

They could go through these books, and figure out what was going on.

Ils pourraient parcourir ces livres et comprendre ce qui se passait.

I'd have come back to ask you to forgive me for not seeing what was going on.

Je serais revenu te demander de me pardonner de ne pas avoir compris ce qui se passait.

— Volver (2006)