[Attempts to reconstruct complete paradigms for IE personal pronouns fail, not because the forms have shifted in manifold ways during the development of the separate languages, but because such paradigms were not then in existence. The parent language had for these pronouns only a number of stems used either by themselves or in combination with various particles, and with little, if any, differentiation of case usage. The development of paradigms, parallel to those of nouns and other pronouns, comes only at a later time.]