Is den used instead of the -en suffix when there is an adjective?
yep! and if you see 'den kjole' on its own and wonder what's going on, think 'that dress'.
I thought common gender didn't add any declension to the adjective, and as I understand it 'grøn' is the basic form. Can someone explain, please?
Men ikke en virkelig grønne kjole, der er grusom.