"Hvorfor står du udenfor?"

Translation: Why are you standing outside?

[jamesrolls95]

Why do you stay outdoor is not allowed

[Xneb]

I have added "Why are you standing outdoors?" and "Why do you stand outdoors?" now. "Outdoor" however is an adjective, whereas "outdoors" is an adverb (as "udenfor" is here)

[KathyKarch]

Ude versus udenfor? What is the difference between these two words? Jeg takker dig for dit svar.