In Greek, past tenses are formed with "augmentation," e.g. present -> imperfect:

• λῡ́ω > ἔλῡον
• εὑρῐ́σκω > ηὕρῐσκον

Since we know that certain Latin verbs preserve perfect reduplication, I wonder: do any Latin verbs also preserve a temporal augment? One potential example immediately comes to mind: ago > egi.

If so, is there any rule we can point to by which some Latin perfect stems are reduplicated, others are augmented, and the rest are formed according to the normal rules?

In Greek, past tenses are formed with "augmentation," e.g. present -> imperfect:

• λῡ́ω > ἔλῡον
• εὑρῐ́σκω > ηὕρῐσκον

Since we know that certain Latin verbs preserve perfect reduplication, I wonder: do any Latin verbs also preserve a temporal augment? One potential example immediately comes to mind: ago > egi.

If so, is there any rule we can point to by which some Latin perfect stems are reduplicated, others are augmented, and the rest are formed according to the normal rules?

In Greek, past tenses are formed with "augmentation," e.g. present -> imperfect:

• λῡ́ω > ἔλῡον
• εὑρῐ́σκω > ηὕρῐσκον

Since we know that the Latin perfect tense sometimes preserves Greek reduplication, I am also curious to know whether this temporal augment is preserved in certain past tense Latin verbs. One potential example immediately comes to mind: ago > egi.

Assuming there is such a pattern, is there any rule we can point to by which some Latin perfect stems are reduplicated, others are augmented, and the rest are formed according to the normal rules?

In Greek, past tenses are formed with "augmentation," e.g. present -> imperfect:

• λῡ́ω > ἔλῡον
• εὑρῐ́σκω > ηὕρῐσκον

Since we know that certain Latin verbs preserve perfect reduplication, I wonder: do any Latin verbs also preserve a temporal augment? One potential example immediately comes to mind: ago > egi.

If so, is there any rule we can point to by which some Latin perfect stems are reduplicated, others are augmented, and the rest are formed according to the normal rules?