21.8 Recall that there are two types of Greek verbs in the present tense:
- –μι verbs (athematic)
- –ω verbs (thematic)
In the ACTIVE VOICE, present tense athematic and thematic verbs use somewhat different endings to designate person and number, as well as the infinitive. In the MIDDLE VOICE, both types of verbs use exactly the SAME PERSONAL ENDINGS to designate person and number, as well as the infinitive mood. All endings are short.
If a verb is athematic (-μι verb), then these endings are added directly to the tense stem.
Note: the persistent accent of the infinitive is on the ANTEPENULT.
21.10 If a verb is thematic (-ω verb), then a thematic vowel (-ο/-ε) is added before its endings. Note that the second person singular regularly appears in one of two contracted forms that result from the loss of the INTERVOCALIC SIGMA (S 628, G 55).
