Tense and aspect are fused as one morpheme.

Irregular verbs so far:
zol "to be" (i need to find the forms for this)
toh "to hear" -> to- with affixes starting with z-; tohl- with perfectives 
hes "to think" + heqg (imperfect irrealis) = heqg
xohl "to strike or hit" -> xol- with affixes starting with z-; + heqg = xoleqg
shet "to give" -> shek- with affixes starting with z-

Not counting verbs where the sh-z harmony rule applies.
(All instances of the phonemes /ʂ/ and /ʃ/ in a word assimilate into whichever of the two is the first to appear.
	Xwasvngzengshab.
	/xʷa.səŋ.ʂeŋ.ʂab/ instead of /xʷa.səŋ.ʂeŋ.ʃab/)