the use of the word 'devoir'

Question

Why is the word 'devions' used in this exercise to represent 'supposed to'?

Jim Jones · Accepted Answer

Bonjour Bobbie
"We were supposed to ------" is translated as "nous devions", the imparfait, an incomplete historical situation.
https://french.kwiziq.com/revision/grammar/l-imparfait-usage-expressing-continuing-action-in-the-past-imperfect-tense
Hope this helps
Bonne continuation
Jim

Maarten Kamp · Answer

Bobbie, 
take a look at the link below which supplements Jim’s answer. 
As usual, there are other ways to express the idea, if that’s what you are asking ?
 https://progress.lawlessfrench.com/revision/grammar/when-to-use-devoir-in-limparfait-or-le-passe-compose

Bobbie Lee · Answer

You have not answered my question above!