It depends on the subject's gender. Male: "ele foi seguido" Female: "Ela foi seguida"
I was thrown off because of the male voice. but this sentence would be said by woman
Do they really use the passive like this in Portuguese? Whenever it comes time to teach my Brazilian students the passive they always say it is almost never used in Portuguese....
"Fomos" is first-person plural preterite. I imagine that "nos" could have been included at the beginning, but "fomos" can be determined as first-person plural without the pronoun. (If corrected by a native Portuguese speaker, I bow to their superior knowledge.)