A and O possession refer to alienable and inalienable possession in Rapa Nui. "a" marks for alienable possession and "o" marks for inalienable possession. "a "and "o" are marked as suffixes of the possessive pronouns; however, they are only marked when the possessive pronoun is in the first, second or third person singular. In (2) above, "taina" 'sibling' is inalienable and the possessor is first person singular "ꞌoꞌoku" 'my'. However, for all the other situations, a and o are not marked as a suffix of the possessor.