"They are buying long yellow beans."
Translation:Ils achètent de longs haricots jaunes.
how can you tell where each adjective goes? I wrote 'Ils achetent des haricots longue et jaune.'
That would translate to "They're buying long and green beans."
I know that colors always go after the noun: Ils achètent des haricots jaunes
Long relates to size in BAGS I'm assuming:
Ils achètent de longs haricots jaunes
"de longS haricotS jauneS " it is plural. You have DE and not DES because the noun "haricot" is associated with an adjective before . " de longs haricots " but " des haricots jaunes" If somebody can give the reference for the grammar?
why is the adjective following the noun feminine but not the adjective preceding the noun?
those adjectives are both masculine. "Jaune" can be masculine or feminine so is "rouge" and many others.
"De" replaces "des", the plural indefinite article (plural of "un/une") when it is followed by an adjective (longs).
I'm assuming they are beans that are both long and yellow. Like those beans that look like green beans but are pale yellow instead. Just a guess though.