(They) used to be (4)
I believe the answer is:
were
(Other definitions for were that I've seen before include "SECOND PART OF 9" , "Existed in the past" , "(We/you) existed" , "Lycanthrope" , "Used to be" .)
I believe the answer is:
were
(Other definitions for were that I've seen before include "SECOND PART OF 9" , "Existed in the past" , "(We/you) existed" , "Lycanthrope" , "Used to be" .)