If you have already met the augment in the imperfect, you know almost everything you need for the aorist — because the augment behaves identically in the two past tenses. Look at a full aorist of γράφω "write":
έγραψα, έγραψες, έγραψε, γράψαμε, γράψατε, έγραψαν.
The stressed ε- sits at the front of the singular and the 3rd plural, and simply isn't there in the 1st and 2nd plural. That is exactly the pattern you saw in the imperfect (έγραφα … γράφαμε). This page shows why, and pins down the one thing that separates the aorist augment from the imperfect one. For the augment across the whole verb system, see the augment overview; for the identical behaviour in the other past tense, the augment in the imperfect.
The one rule: the augment carries the stress
In older Greek the augment was a grammatical marker of past time. In modern Greek it has quietly shed that role and kept only a phonological one: a past-tense form is stressed on the third-from-last syllable (the antepenult), and the ε- is added only when the word would otherwise be too short to put the stress there.
Take the perfective stem γραψ- and the past endings -α, -ες, -ε, -αμε, -ατε, -αν:
- 1sg γραψ + α would be just two syllables (γρά-ψα) — nowhere to place an antepenultimate stress. So Greek prefixes έ-: έγραψα (έ-γρα-ψα).
- 1pl γραψ + αμε → γράψαμε is already three syllables (γρά-ψα-με). The stress lands on the antepenult unaided, so no augment.
That is the whole mechanism. The augment is a crutch for the stress, added only when the ending is short.
| Person | Aorist | Syllables | Augment? |
|---|---|---|---|
| εγώ | έγραψα | έ-γρα-ψα | yes |
| εσύ | έγραψες | έ-γρα-ψες | yes |
| αυτός | έγραψε | έ-γρα-ψε | yes |
| εμείς | γράψαμε | γρά-ψα-με | no |
| εσείς | γράψατε | γρά-ψα-τε | no |
| αυτοί | έγραψαν | έ-γρα-ψαν | yes |
Της έγραψα ένα μεγάλο μήνυμα χθες το βράδυ.
tis éghrapsa éna meghálo mínima chthes to vrádhi
I wrote her a long message last night.
Ο γιατρός έγραψε μια συνταγή για τον βήχα μου.
o yatrós éghrapse mia sindayí ya ton vícha mu
The doctor wrote a prescription for my cough.
Γράψαμε τα ονόματά μας στη λίστα και περιμέναμε.
ghrápsame ta onómatá mas sti lísta ke periméname
We wrote our names on the list and waited.
The only difference from the imperfect: the stem
Here is the point an English speaker should hold onto. The augment, the endings, and the on/off pattern are the same in the imperfect and the aorist. The single thing that changes is the stem — imperfective for the imperfect, perfective for the aorist:
| Imperfect | Aorist | |
|---|---|---|
| Stem | γραφ- (imperfective) | γραψ- (perfective) |
| 1sg | έγραφα | έγραψα |
| 1pl | γράφαμε | γράψαμε |
| Meaning | I was writing / used to write | I wrote (once, finished) |
So the augment is not where the aorist–imperfect contrast lives. If you can build the perfective stem — and for γράφω that is just φ + σ merging into ψ — you already know how to augment it, because the rule is the one you learned for the imperfect. The whole story of choosing between these two past tenses is aspect, not the augment: see imperfective vs perfective.
More short Class Α verbs
Every first-conjugation verb whose perfective stem is short behaves like γράφω. παίζω "play" has the perfective stem παιξ- (ζ + σ → ξ), and τρέχω "run" has τρεξ- (χ + σ → ξ). Both need the augment in the singular and 3rd plural, and drop it in the 1st and 2nd plural:
| παίζω → παιξ- | τρέχω → τρεξ- | |
|---|---|---|
| εγώ | έπαιξα | έτρεξα |
| εμείς | παίξαμε | τρέξαμε |
| αυτοί | έπαιξαν | έτρεξαν |
Χθες έπαιξα ποδόσφαιρο με τα ξαδέρφια μου στην παραλία.
chthes épeksa podhósfero me ta ksadhérfia mu stin paralía
Yesterday I played football with my cousins at the beach.
Έτρεξα μέχρι τη στάση, αλλά το τρένο είχε ήδη φύγει.
étreksa méchri ti stási, alá to tréno íche ídhi fíyi
I ran to the stop, but the train had already left.
Παίξαμε χαρτιά μέχρι αργά το βράδυ.
péksame chartiá méchri arghá to vrádhi
We played cards until late at night.
Long verbs and Class Β take no augment
The augment only ever shows up to rescue a short word. Verbs whose perfective stem is already long enough to host an antepenultimate stress never take one — and this covers two big groups.
Class Α verbs with a longer stem. αγοράζω "buy" has the perfective stem αγορασ-, giving αγόρασα (α-γό-ρα-σα) — four syllables, stress comfortably on the antepenult, no ε- needed. The same goes for διαβάζω "read" → διάβασα:
Αγόρασα καινούρια παπούτσια για τον γάμο του αδερφού μου.
aghórasa kenúria papútsia ya ton ghámo tu adherfú mu
I bought new shoes for my brother's wedding.
Διάβασα όλο το βιβλίο σε ένα Σαββατοκύριακο.
dhiávasa ólo to vivlío se éna Savatokíriako
I read the whole book in one weekend.
Class Β verbs (the -άω/-ώ conjugation). These build their aorist on the -ησ- suffix, so they are always long: αγαπώ "love" → αγάπησα (α-γά-πη-σα). There is simply no room and no need for an augment anywhere in the paradigm:
Αγάπησα αυτή την πόλη από την πρώτη κιόλας μέρα.
aghápisa aftí tin póli apó tin próti kiólas méra
I loved this city from the very first day.
Μιλήσαμε δύο ώρες και δεν καταλάβαμε πώς πέρασε ο χρόνος.
milísame dhío óres ke dhen katalávame pos pérase o chrónos
We talked for two hours and didn't notice how the time passed.
When the augment looks strange
Two families of verbs bend these rules, and both get their own page. Compound (prefixed) verbs put the augment inside the word, at the prefix–stem seam rather than at the front (never ×εκατάλαβα). On learned compounds you can see it as a vowel: ανεβαίνω → ανέβηκα, υπογράφω → υπέγραψα. On everyday ones there is no vowel to see at all — καταλαβαίνω → κατάλαβα simply retracts the stress onto the prefix, which is the same augment slot realised as stress rather than as an ε. And a handful of high-frequency verbs take an η- augment instead of ε-: θέλω → ήθελα, πίνω → ήπια, έρχομαι → ήρθα. Both are collected on internal and η- augment — that is where most of the aorist's "irregular" looks actually come from.
Common Mistakes
1. Dropping the augment in the singular. A short verb needs the ε- to give the stress its third syllable.
❌ Χθες γραψα ένα γράμμα στον παππού μου.
Incorrect — the short singular needs the augment: έγραψα.
✅ Χθες έγραψα ένα γράμμα στον παππού μου.
chthes éghrapsa éna ghráma ston papú mu
Yesterday I wrote a letter to my grandfather.
2. Keeping the augment in the 1st/2nd plural. With the ending already three syllables long, an added ε- would push the stress four syllables back — which Greek does not allow.
❌ Έγραψαμε τα ονόματά μας στη λίστα.
Incorrect — the 1pl drops the augment: γράψαμε.
✅ Γράψαμε τα ονόματά μας στη λίστα.
ghrápsame ta onómatá mas sti lísta
We wrote our names on the list.
3. Adding an augment to a long Class Α verb. αγοράζω is already long; it takes no ε-.
❌ Εαγόρασα ένα καινούριο ποδήλατο.
Incorrect — αγοράζω is long enough: αγόρασα, no augment.
✅ Αγόρασα ένα καινούριο ποδήλατο.
aghórasa éna kenúrio podhílato
I bought a new bicycle.
4. Adding an augment to a Class Β verb. The -ησ- aorist is never short, so it never augments.
❌ Εαγάπησα πολύ εκείνο το καλοκαίρι.
Incorrect — Class Β takes no augment: αγάπησα.
✅ Αγάπησα πολύ εκείνο το καλοκαίρι.
aghápisa polí ekíno to kalokéri
I loved that summer very much.
Key Takeaways
- The aorist augment is the same stressed ε- as the imperfect's, doing the same job: it appears only to give a short past form its antepenultimate stress.
- It is present in the singular and 3rd plural of short Class Α verbs (έγραψα, έπαιξα, έτρεξα) and absent in the 1st/2nd plural (γράψαμε, παίξαμε).
- Longer Class Α stems (αγόρασα, διάβασα) and all Class Β verbs (αγάπησα) are already long enough and take no augment.
- The only difference between the imperfect and the aorist is the stem (perfective γραψ- vs imperfective γραφ-), not the augment.
- Compounds put the augment inside — visible as a vowel on learned ones (υπέγραψα), realised as stress retraction with no vowel at all on everyday ones (κατάλαβα) and a few verbs use an η- augment (ήθελα, ήρθα) — both on the internal and η- augment page.
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Start learning Greek →Related Topics
- The Augment (past-tense ε-)A2 — Why Greek past tenses sometimes grow an extra ε- at the front (έγραψα, έπαιξα) and sometimes don't (αγόρασα, διάβασα) — the augment is really a stress-carrier, not a tense marker, and that one idea explains all its comings and goings.
- The Augment in the ImperfectB1 — Why the stressed ε- appears on έγραφα and έπαιζα but vanishes in γράφαμε and παίζατε — the augment's real job of hosting the antepenultimate stress, plus its behaviour on compound verbs and its absence on Class Β.
- Internal and η- AugmentB2 — Why the past of a compound verb lands the augment inside the word (κατάλαβα, ανέβηκα, υπέγραψα) and why a handful of verbs use η- instead of ε- (ήθελα, ήπια, ήρθα) — the two places where the augment, not the stem, is what makes a past tense look irregular.