Quote Originally Posted by renataf View Post
So, when I write or speak a sentence with interrogative pronouns I need to put the interrogative pronoun in the same case it refers. For example, What fruit do you like? in Russian will be который фрукт ты любишь?, фрукт doesn´t change because is an inanimate noun of masculine gender and, in the sentence, is in accusative case. который that refers to фрукт doesn´t change because фрукт is an inanimate noun and according to the rules there´s no need to change it. который is in accusative case too. Is it that?
Yes, the logic and cases are right, but native Russian most probably would say "Какие фрукты ты любишь?" (in plural) or "Что из фруктов тебе нравится?"