Sanskrit pronouns are declined for case, number, and gender. Many pronouns have alternative enclitic forms. The first and second person pronouns are declined for the most part alike, having by analogy assimilated themselves with one another. Ablatives in singular and plural may be extended by the syllable -tas; thus mat or mattas, asmat or asmattas. Sanskrit does not have true third person pronouns, but its demonstratives fulfil this function instead by standing independently without a modified substantive.