Allomorphy

1. su-Rule

	The root suy- ('water') has an allomorph su-
	when not followed by a V.


2. ban-rule

	The root ben- ('I') has allomorph ban-
	when followed by the Dative suffix.


3. Passive allomorphy

	The passive suffix /l/ has the allomorph /n/
	when preceded by V or /l/.


4. Causative allomorphy

	The causative suffix /DIr/ assumes the shape /t/ after a polysyllabic
	stem that ends in a vowel or a liquid.


3. Aorist allomorphy

	The Aorist suffix /r/ has allomorph /Er/ when attached to any
	monosyllabic root other than the 13 listed exceptions.

	There is more to the Aorist allomorphy:
	Following the negative morpheme, the aorist suffix takes the
	shape /z/.

        There are further irregularities in the agreement system for the
	negative Aorist, which will not be revealed here.

	The Aorist might make a good DM problem.