rule 1 δ ι δω (διδωμι)
rule 2 διδω μι
-no conn vowel in present active
rule 3 ωμι, ωσι, ωασι
-three different personal endings in present, active, indicative
διδω μι
διδω σι (ν)
διδω ασι (ν)
rule 4
-stem vowel can lengthen, shorten, or drop out
rule 5 κα
-most use (κα) tense formative in aorist