| A | B |
|---|
| Present Active Infinitive | -ειν (contracted forms: εῖν, ᾶν, οῦν) |
| Present Passive Infinitive | -εσθαι (contracted forms: εῖσθαι, ᾶσθαι, οῦσθαι) |
| Future Active Infinitive | -ειν (added to future stem) |
| Future Middle Infinitive | -εσθαι (added to future stem) |
| Future Passive Infinitive | -εσθαι (added to unaugmented aorist passive stem + ης) |
| First Aorist Active Infinitive | -αι (added to unaugmented aorist active and middle stem - accent persistent on penult) |
| First Aorist Middle Infinitive | -ασθαι (added to unaugmented aorist active and middle stem - accent recessive) |
| Second Aorist Active Infinitive | -εῖν (added to unaugmented aorist active and middle stem) |
| Second Aorist Middle Infinitive | -έσθαι (added to unaugmented aorist active and middle stem) |
| Aorist Passive Infinitive | -ῆναι (added to unaugmented aorist passive stem) |
| Perfect Active Infinitive | -έναι (added to perfect active stem) |
| Perfect Middle/Passive Infinitive | -σθαι (added to perfect middle/passive stem - accent persistent on the penult) |
| Present Active Infinitive - Athematic Verbs (-μι) | -ναι (added to short-grade present active stem - accent persistent on penult) |
| Present Middle/Passive Infinitive - Athematic Verbs (μι) | -σθαι (added to the short-grade present active stem - accent recessive) |
| (Root) Aorist Active Infinitive | -ναι (added to long-vowel grade of stem - accent persistent on penult) |
