FRENCH: pronoms relatifs
I have a question concerning the relative pronouns in French, more specifically the difference between "auquel" and "à quoi". They both can refer to things (the second one only to things), the second one with things more abstract or wider categories, but I can't quite put my finger on it.
Is there some clear rule what to apply when? Are they interchangeable?
Is there some clear rule what to apply when? Are they interchangeable?