"I sleep on a big bed."
Translation:Duermo en una cama grande.
I'm getting confused about when to put the adjective before the noun and when to put it after. A few days ago, "I want a big elephant" was "Quiero un gran elefante", but when I used "una gran cama" for "a big bed" in this sentence, Duo marked me wrong and told me it had to be "una cama grande". So is it about masculine/feminine? animate/inanimate? something else I'm missing?
Here's a good link re this: http://spanish.about.com/od/adjectives/a/adjective_placement.htm
I'm not sure why Duolingo didn't like "una gran cama" but putting it before might mean "a great bed" instead of a big bed. Just guessing.
I think Duo are right here but probably wrong about the elephant. Un gran elefante is a great elephant, un elefante grande is a big elephant. Of course, great can mean big too. A big bed is una cama grande. La gran cama is indeed the great bed - I wonder if a Spanish child might refer to their parents' bed in that way ?