Aorist vs. Imperfect in Greek

In Brief

Use the aorist (αόριστος) to present a past action as one complete event: Χθες διάβασα ένα βιβλίο (“Yesterday I read a book”). Use the imperfect (παρατατικός) to show an action in progress, a past habit, or background: Κάθε μέρα διάβαζα (“Every day I used to read”). In a story, the imperfect often describes what was happening when an aorist event occurred.

Overview

Modern Greek normally makes you choose how to present a past action. The aorist treats it as a whole, with its internal stages out of view. The imperfect looks at it from inside—as ongoing, repeated, habitual, or providing the scene around another event. This difference in viewpoint is called aspect (how a speaker presents the flow or shape of an action).

At A2, the most useful shortcut is “aorist for a completed event; imperfect for something ongoing or habitual.” That rule will handle many everyday situations. Compare έγραψα (“I wrote”) with έγραφα (“I was writing” or “I used to write”). Both locate the action in the past, but they give it a different shape.

English offers useful clues, especially “was doing” and “used to do,” but it does not always force the same distinction. “I read a lot last summer” could describe a general habit or summarize a bounded period. Greek asks you to choose the intended viewpoint. That choice is central to telling stories, describing childhood, explaining interruptions, and reporting what happened.

How It Works

The beginner decision

Ask what job the past verb is doing:

Intended view	Usual Greek tense	Typical English rendering
One event seen as a complete whole	Aorist	did, went, wrote
Action in progress at a past moment	Imperfect	was doing
Habit or repeated routine without a bounded total	Imperfect	used to do, would do
State, circumstance, or scene in the background	Imperfect	was, had, knew
Event that advances the story	Aorist	then did, suddenly happened

These are meaning-based choices, not simply rules about how long an action lasted. A long event can be in the aorist if it is summarized as one whole: Έμεινα στην Αθήνα δέκα χρόνια (“I stayed in Athens for ten years”). A brief action can be imperfect if you focus on it unfolding or recurring: Κάθε τόσο χτυπούσε την πόρτα (“Every so often, he kept knocking on the door”).

Aorist: the whole event

Use the aorist when you report that an event happened and view it from the outside:

• Άνοιξα το παράθυρο. — “I opened the window.”
• Φτάσαμε στις οκτώ. — “We arrived at eight.”
• Έζησε εκεί για πολλά χρόνια. — “He lived there for many years.”

Expressions such as χθες (“yesterday”), ξαφνικά (“suddenly”), στις οκτώ (“at eight”), and για δύο ώρες (“for two hours”) often occur with the aorist when they locate or bound an event. They are clues, not automatic triggers.

Imperfect: the inside view

Use the imperfect for an action already in progress at the time you are describing:

• Στις οκτώ μαγείρευα. — “At eight I was cooking.”
• Ενώ περπατούσαμε, άρχισε να βρέχει. — “While we were walking, it started to rain.”

Use it also for open-ended repetition or habit:

• Τα καλοκαίρια πηγαίναμε στο χωριό. — “In the summers we used to go to the village.”
• Κάθε βράδυ τηλεφωνούσε στη μητέρα του. — “Every evening he used to call his mother.”

Descriptions and continuing states commonly take the imperfect because they form the setting rather than a new event:

• Ήταν αργά και έκανε κρύο. — “It was late and it was cold.”
• Είχαμε χρόνο και θέλαμε να περπατήσουμε. — “We had time and wanted to walk.”

Background plus interruption

A very common pattern combines the two tenses:

imperfect background or ongoing action + aorist event

Ενώ έγραφα, χτύπησε το τηλέφωνο. “While I was writing, the phone rang.”

Here έγραφα opens a scene already in progress. Χτύπησε introduces a complete event inside that scene. If both actions were unfolding together, both could be imperfect: Εγώ μαγείρευα ενώ εκείνος έπλενε τα πιάτα (“I was cooking while he was washing the dishes”). If both are successive completed events, both are aorist: Μαγείρεψα, φάγαμε και φύγαμε (“I cooked, we ate, and we left”).

Habit versus counted repetition

The imperfect naturally describes a routine with no focus on its total number:

• Πήγαινα συχνά εκεί. — “I used to go there often.”

The aorist can describe repetition too when the repetitions form a completed, counted, or bounded set:

• Πήγα εκεί τρεις φορές. — “I went there three times.”
• Για μία εβδομάδα, τηλεφώνησε κάθε μέρα. — “For one week, he called every day.”

So κάθε μέρα (“every day”) does not force the imperfect. Compare an open-ended former habit, Κάθε μέρα διάβαζα, with a completed series in a defined week, Εκείνη την εβδομάδα διάβασα κάθε μέρα.

Recognizing common pairs

The two forms often use different stems. Learning them as pairs is more reliable than trying to build one from the other during conversation.

Present	Imperfect	Aorist	Basic contrast
γράφω	έγραφα	έγραψα	was/used to write — wrote
διαβάζω	διάβαζα	διάβασα	was/used to read — read
μιλάω	μιλούσα	μίλησα	was/used to speak — spoke
πηγαίνω	πήγαινα	πήγα	was/used to go — went
βλέπω	έβλεπα	είδα	was/used to see — saw
τρώω	έτρωγα	έφαγα	was/used to eat — ate
έρχομαι	ερχόμουν	ήρθα	was/used to come — came
είμαι	ήμουν	—	was; no ordinary aorist counterpart in this basic contrast
έχω	είχα	—	had; normally imperfect for past possession/state

The stem is the core part of a verb to which endings attach. Some aorists, such as είδα, έφαγα, and ήρθα, have irregular stems and must be learned individually. This article focuses on choosing the tense; formation is covered in the separate tense articles.

Questions and negatives

The same aspect contrast remains in questions and with δεν (“not”):

• Τι έκανες χθες; — “What did you do yesterday?” The day is treated as a completed frame.
• Τι έκανες όταν τηλεφώνησα; — “What were you doing when I called?” Here Greek commonly uses the imperfect έκανες because the question asks about an activity in progress; English translation and context reveal the intended reading.
• Δεν διάβασα το μήνυμα. — “I did not read the message.” A completed event did not occur.
• Δεν διάβαζα τα μηνύματα τότε. — “I was not reading / did not use to read the messages then.” This describes a continuing situation or habit.

Notice that the same written form can sometimes receive different English translations. Meaning comes from the Greek aspect plus context, not from a one-to-one tense label.

Examples in Context

Greek	English	Note
Χθες διάβασα ένα βιβλίο.	Yesterday I read a book.	One completed reading event
Κάθε μέρα διάβαζα.	Every day I used to read.	Open-ended past habit
Ενώ έγραφα, χτύπησε το τηλέφωνο.	While I was writing, the phone rang.	Ongoing background + complete event
Όταν ήμουν μικρός, έπαιζα ποδόσφαιρο.	When I was young, I used to play football.	Childhood state and habit
Η Μαρία μαγείρευε και ο Νίκος έστρωνε το τραπέζι.	Maria was cooking and Nikos was setting the table.	Two simultaneous ongoing actions
Άνοιξε την πόρτα, μπήκε και κάθισε.	She opened the door, came in, and sat down.	A sequence that moves the story forward
Έβρεχε, φυσούσε και οι δρόμοι ήταν άδειοι.	It was raining, it was windy, and the streets were empty.	Background scene
Μείναμε στην Κρήτη για δύο εβδομάδες.	We stayed in Crete for two weeks.	A long but bounded stay, viewed as a whole
Πήγαινα συχνά σ’ εκείνο το καφέ.	I used to go to that café often.	Repeated routine
Πήγα σ’ εκείνο το καφέ τρεις φορές.	I went to that café three times.	Counted, completed repetitions
Στις εννιά κοιμόταν ακόμα.	At nine he was still sleeping.	In progress at a specific time
Περίμενα το λεωφορείο όταν σε είδα.	I was waiting for the bus when I saw you.	Ongoing action + aorist event
Εκείνη την εβδομάδα γυμνάστηκα κάθε μέρα.	That week I exercised every day.	Repeated but bounded series
Δεν κατάλαβα την ερώτηση.	I did not understand the question.	Failure to reach understanding in that event

Common Mistakes

Choosing by duration alone

• Wrong: Έμενα στην Αθήνα δέκα χρόνια. if you mean a finished ten-year stay viewed as one chapter.
• Right: Έμεινα στην Αθήνα δέκα χρόνια.
• Why: Ten years is long, but the stated duration gives the stay a boundary and the speaker summarizes it as a whole. Έμενα is possible in a different context, such as describing where you were living during that period.

Treating every repeated action as imperfect

• Wrong: Πήγαινα εκεί τρεις φορές. when reporting three completed visits.
• Right: Πήγα εκεί τρεις φορές.
• Why: A counted total is viewed as a bounded set. Use the imperfect for an unbounded routine: Πήγαινα εκεί συχνά.

Putting both verbs in the aorist in an interruption pattern

• Wrong: Ενώ έγραψα, χτύπησε το τηλέφωνο. for “While I was writing, the phone rang.”
• Right: Ενώ έγραφα, χτύπησε το τηλέφωνο.
• Why: The writing was already unfolding, so it needs the imperfect. The ring is the complete interrupting event.

Assuming “when” always selects one tense

• Wrong rule: όταν always takes the aorist.
• Right: Όταν ήρθε, φύγαμε (“When he arrived, we left”), but Όταν ήμουν μικρός, έπαιζα έξω (“When I was young, I used to play outside”).
• Why: Όταν only links times. The meaning of each action determines its aspect.

Translating English simple past mechanically

• Wrong: Automatically using the aorist for every English simple-past verb.
• Right: Translate “I walked to work every day” as Πήγαινα στη δουλειά με τα πόδια κάθε μέρα.
• Why: English simple past can express a habit. Greek normally marks that open-ended habitual view with the imperfect.

Usage Notes

Time expressions guide interpretation but do not choose the tense by themselves. Χθες often accompanies the aorist because yesterday is finished, yet Χθες στις πέντε δούλευα (“Yesterday at five I was working”) uses the imperfect because the speaker looks inside the activity. Likewise, πάντα, συχνά, and κάθε μέρα often suggest the imperfect, but a bounded period can make aorist repetition natural.

In narration, think of the imperfect as the camera lingering on a scene and the aorist as a series of cuts to whole events. This is a useful learning image, not an absolute grammatical law. A speaker can change the viewpoint to emphasize process, persistence, completion, or the event’s role in the story.

English “would” can express a past habit—“On Sundays we would visit our grandparents”—and then Greek normally uses the imperfect: Τις Κυριακές επισκεπτόμασταν τους παππούδες μας. But English “would” also marks conditional meaning, which is a separate topic and should not automatically be translated with the imperfect.

Beyond the Basics / Advanced Use

You do not need to master all of these nuances at A2, but they explain choices you will encounter later.

Viewpoint can change the message

Sometimes both tenses are grammatical, but they answer different questions:

• Διάβαζα το βιβλίο. — “I was reading the book.” The process is in view; this does not say whether I finished it.
• Διάβασα το βιβλίο. — “I read the book.” The reading is presented as a complete event.

The imperfect does not mean the action definitely remained unfinished. It simply does not present the endpoint. Conversely, the aorist presents the event as a whole, but real-world results may later be undone: Άνοιξα την πόρτα και μετά την έκλεισα (“I opened the door and then closed it”).

States can be bounded

States such as knowing, wanting, having, or being often appear in the imperfect because they continue in the background: Ήξερα την απάντηση (“I knew the answer”), Ήθελα καφέ (“I wanted coffee”). With some verbs, an aorist form can create an event-like or changed-state meaning. For example, ήθελα commonly means “I wanted,” while θέλησα can mean “I decided/wanted at a particular moment” or “I was willing.” These lexical differences are best learned with complete examples rather than through a universal formula.

Politeness and softened requests

The imperfect sometimes makes a present request sound less abrupt by placing the wish at a polite distance: Ήθελα να ρωτήσω κάτι literally resembles “I wanted to ask something,” but in context it can introduce a question being asked now. This is a pragmatic use—meaning shaped by social context—not a past-time contrast with the aorist.

Aspect continues beyond the past

The same imperfective-versus-perfective opposition appears elsewhere in Greek. Compare να γράφω (ongoing or repeated writing) with να γράψω (writing viewed as one whole), and θα γράφω with θα γράψω. Recognizing the aorist/imperfect contrast therefore prepares you for the subjunctive, future, imperative, and the broader Greek aspect system.

Practice Tips

1. Build two-column verb cards. Record useful pairs such as έβλεπα / είδα, πήγαινα / πήγα, and έτρωγα / έφαγα. Add one “in progress or habit” sentence and one “whole event” sentence for each pair.
2. Retell a short day twice. First list the completed events in the aorist: “I woke up, left, arrived.” Then add imperfect background: the weather, what people were doing, and your usual routine.
3. Use the interruption frame. Make five sentences with Ενώ …, …: imperfect after ενώ for the unfolding scene and aorist for the event that occurs. Then vary the pattern by putting two simultaneous actions in the imperfect.

Related Concepts

• Prerequisite: Imperfect Tense (Παρατατικός) — learn how the imperfect is formed and used before focusing on the contrast.
• Foundation: Simple Past (Αόριστος) — review aorist forms, including common irregular stems.
• Next step: Temporal Connectors — connect past events with όταν, ενώ, πριν, αφού, and μόλις.
• Later connection: Future Tenses — apply the same aspect distinction to θα γράφω and θα γράψω.