>>240 I wonder why you put 、between んandに. Maybe it's just typo but FYI こんにちは is right. ^_^
I know what you are trying to say butあなたは、もうクリスマスツリーを 持っていますか? isn' t right.
You must be trying to say あなたは、もうクリスマスツリーを出しましたか?
Well, I live alone so I don't have Christmas tree at my place. I think it's too early to decorate Christmas tree at home in houses in Japan while I know Americans are thinking about Christmas right after Thanksgiving.
I would place Christmas tree about a week before Christmas if I had one.