Tolkappiyar

“ They appear in two forms: tense explicating verb-form denoting a deed and appellative verb in noun-form. 3 Both of them belong to three forms of classes: human-class, non-human-class and common or neutral class. 4 Morphemes denoting First person in verbs Eight morphemes come in verb designating first person plural: [am] , [aam] , [e’m] , [ee’m] , [kum] , [dum] , [thum] and [r’um] . 5 Seven morphemes come in verb designating first person singular: [ku] , [du] , [thu] , [r’u] , [e’n] , [e’n] and [al] . ”