I remember studying French. In French, most adjectives come after the noun they modify (ciel bleu, blue sky), but some come before (grande maison, big house). We were taught the acronym: BAGS: beauty, age, goodness, size, to determine what came before the noun. So a big blue house would be grande maison bleue. A pretty girl is a jolie fille. An old man is a vieil homme. A bad idea is a mauvaise idée. I doubt native french speakers learn this explicitly, but when your learning it as a second language you need shortcuts to understand what sounds intuitively correct and incorrect to natives.