TKD 43: This suffix [{-vIS}] is always used along with the Type 7 suffix {-taH} “continuous". Just consider it one of Okrand’s “just because” rules. We could argue the whys and wherefores to death – and we often do! – but, in the end, we just have to accept it and move on. In fact, I could only find only one example of {-vIS} and {-lI’} even occurring in the same sentence, albeit on different verbs: ghobe' ! qarbejbogh DoDvam qontaH 'u' jevqu'taHvIS muD ral, bejlI' parmaq. Oh, no ! It [love] is an ever-fixed mark. That looks on tempests and is never shaken. (Sonnet 116) --Voragh On Behalf Of mayqel qunenoS I can't understand why the {-lIvIS} is illegal. Can't I be doing something, while something is proceeding towards a known goal or stopping point ?