I'm wondering about the origins of the various non-finite verbal endings in Latin.
My understanding so far of their PIE origins:
- Present Active: -s-ey (dative of an s-stem verbal noun)
- Perfect Active: no idea
- Present Passive: thematic genitive either on bare stem or s-stem depending on conjugation?
- Present Active: -nt-s, other branches have o-grade in thematic verbs
- Future Active: no idea
- Perfect Passive: -t-os
- Future Passive: related to the gerund?
- Verbal Nouns:
- Gerund: presumably related to the present active participle, but the voicing is odd
- Supine: -tu-s
Is anyone aware of further information on any of these?