On 23 January 2018 at 12:39, Lieven L. Litaer <levinius@gmx.de> wrote:
There are several examples with {-lu'}, and each of them combined with {-be'} make me see them as the negation of the verb, not the suffix.
I may be wrong, but I think there are no canon examples with {-lu'be'} except for {tu'lu'be'}. I'd avoid {-lu'be'}. My feeling is that it's technically ungrammatical, but would be understood as slightly sloppy speech.