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<DIV><FONT face="Times New Roman">I have tended to interpret the Crow citation forms as a mostly phonological innovation, since Hidatsa seems to lack them. Crow seems to have decided that it doesn't like words that end in i(i), u(u) or aa. There are exceptions, however, since vocatives (always) and adverbs (mostly) do not use the citation form. However, the fact that there are several suffixes that follow the citation form rather than the stem, as John notes, leads one to wonder if there isn't a deeper historical explanation.</FONT></DIV>
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<DIV><FONT face="Times New Roman">Randy</FONT></DIV></BODY></HTML>