Translation:Our door will be open.
is there any way to distinguish door from doors in a sentence like this?
The conjugation of the verbs are not OK. The correct answer should be WILL BE OPENED. Or WILL OPEN
OPEN is an adjective. Adjectives do not have any conjugation.
The door will open. Dveře se otevřou.
The door will be opened. Dveře budou otevřeny.