From: Miguel Carrasquer
Message: 40970
Date: 2005-10-02
>Now there certainly is a variation in Indo-Iranian between <a> and <Ø>, and3sg. caká:ra. The /a:/ must come from /o/.
>we can justifiably call that Ablaut.
>
>And we certainly have <a:> as well as <a>.
>
>But why do you not show me an *o-grade in the perfect singular, for openers?