was following
Who was following whom?
Ziri stava seguendo la traccia di sangue.
Ziri was following the trail of blood.
Signorina Schnabelstedt, lei stava seguendo un compito.
Miss Schnabelstedt, you were doing an assignment.
— Fuck you, prof! (2013)
He was following her tracks.
Mary sapeva che qualcuno la stava seguendo.
Mary knew someone was following her.
Tom si è accorto che Mary lo stava seguendo.
Tom noticed that Mary was following him.