Which board is proper to describe the state of any shop/restaurant?
A restaurant with the board Close OR Closed?
A restaurant with the board Open OR Opened?
Well, if I think 'closed' is used when the restaurant is permanently or temporarily closed for more than a day (say for holidays or renovation), what about the conversation mentioned below? It takes -ed even for that day!
"Hey Mike, I forgot my specs at home. Do you see the restaurant there at distance? Is it open?
"Yeah, I do see. But it's closed.
I think open/opened or close/closed here is not a verb. If it isn't, then what is it in those examples?