@JamesTWils for red apple, you need to turn to a relative 'apple that is red'. There are 3 relative particles, -í / -ii / -ígíí, of basicalle identical meaning. Mind that adding these enclitics will have various tone/length impacts on last vowel. So red apple would be bilasáana łichíʼí / lichíiʼii / łichíʼígíí. You have them in chʼil łitsxooí (the plant that is yellow), dootłʼizhii (that which is turquoise).
More exactly, "a being-red apple". It is stative, not transitional.
There are very few true adjectives, most are stative verbs, which means you can conjugate them with various person/number: Łinishchíí' = I am red, daalchíí' = they are red.
Being stative, they only appear in one "tense", and don't conjugate in present / past / future / optative / iterative / usitative etc...