fuistis

fuistis is a Latin form of sum, meaning “be, exist; (as auxiliary) is, are, was”. It is the 2nd person plural perfect active indicative.

Found 36 times in the Latin texts on Socratos.

Where it is used

Caesar, De Bello Civili 3.91: … pilum in legione X duxerat, vir singulari virtute. Hic signo dato, sequimini me, inquit, manipulares mei qui fuistis, et vestro imperatori quam constituistis operam date. Unum hoc proelium superest; quoi confecto et ille suam …

Plautus, Captivi 2.1.197: domi fuístis, credo, líberi:

All forms of sum (conjugation table)

Source: Socratos (socratos.org), a free reader for Ancient Greek and Latin. Grammar from the Perseus Treebank and Morpheus; dictionary entries from Lewis & Short, A Latin Dictionary (Perseus Digital Library, CC BY-SA). Counts are from the texts on Socratos.