Esperanto participles do more than locate an action in calendar time. They present its phase: unfolding or repeated (-ant-/-at-), completed (-int-/-it-), or still prospective (-ont-/-ot-). The lexical meaning of the verb, surrounding adverbs, and discourse context then produce readings such as ongoing process, habit, achieved result, intention, or imminence.
Tense and participial phase are separate choices
In an analytic form, finite esti establishes the reference time; the participle locates the other action around that point.
Kiam mi telefonis, ŝi estis verkanta la raporton.
When I called, she was writing the report.
Kiam mi telefonis, ŝi estis jam verkinta la raporton.
When I called, she had already written the report.
Kiam mi telefonis, ŝi estis verkonta la raporton, sed ankoraŭ ne komencis.
When I called, she was about to write the report but had not started yet.
All three descriptions are situated in the past by estis. -ant- opens a view inside the writing, -int- places completed writing before that view, and -ont- presents a state before writing begins. Calling these “present, past, and future participles” is a useful mnemonic for their vowels but a poor semantic analysis.
-ant-/-at-: internal view, duration, or repetition
The a-vowel participles present an action as underway, not yet completed in the chosen view, or repeatedly occurring.
La teamo estas nun testanta la novan programversion.
The team is currently testing the new software version.
La programo estas testata post ĉiu grava ŝanĝo.
The program is tested after every major change.
The first is ongoing at the present reference time. The second is habitual: each major change triggers a new test. -at- is therefore not limited to an English “is being tested” progressive. Repetition also keeps the action open as a pattern.
Lexical aspect matters. A naturally extended activity such as verki readily receives a process reading. A punctual achievement such as trovi usually needs a repeated, gradual, or attempt-like context with -at-:
Dum la serĉado, novaj spuroj estis trovataj iom post iom.
During the search, new clues were being found one by one.
Without iom post iom or a plural/repeated context, a single discovery normally favors completed trovita.
-int-/-it-: completion and result
Active -int- presents its subject after completing the action, normally before the reference point.
Fininte la intervjuojn, la esploristoj komencis analizi la respondojn.
Having completed the interviews, the researchers began analyzing the answers.
Passive -it- highlights completion or a resulting condition. That result may hold at the reference point; the action need not be narrated as a separate earlier event.
Je la sesa la pordoj estis fermitaj, kaj la gardisto ekiris hejmen.
At six the doors were closed, and the guard set off home.
Depending on context, estis fermitaj can report that closing reached completion at six or that the doors were already in the resulting closed state then. Add jam antaŭe if strict anteriority matters:
Je la sesa la pordoj estis jam antaŭe fermitaj, sed la lumoj ankoraŭ brulis.
At six the doors had already been closed earlier, but the lights were still on.
English “was closed” is itself ambiguous between an event and a state. Esperanto does not mechanically resolve every real-world ambiguity; it supplies -at-/-it-, tense, and optional time adverbs, and speakers select enough detail for the context.
The central -at- versus -it- contrast
The most reliable decision test is not “present versus past,” but process/repetition versus completion/result.
| Question | Choose | Example |
|---|---|---|
| Is the action unfolding, repeated, or viewed internally? | -at- | La ponto estis riparata dum Julio. |
| Did the action reach completion, or does its result matter? | -it- | La ponto estis riparita en Julio. |
Dum Julio la ponto estis riparata, sed la laboro finiĝis nur en Aŭgusto.
During July the bridge was under repair, but the work was not finished until August.
La ponto estis riparita en Julio kaj tuj remalfermita al trafiko.
The bridge was repaired in July and immediately reopened to traffic.
The first sentence explicitly withholds completion during July. The second asserts a completed repair. Add iom post iom, plu kaj plu, or ree kaj ree to test whether an -at- interpretation fits naturally.
-ont-/-ot-: a pre-action state
The o-vowel participles do not merely predict the future. They present a participant as prepared, intended, assigned, imminent, or otherwise characterized before an action begins.
Ni estis forirontaj, kiam la elektro subite estingiĝis.
We were about to leave when the electricity suddenly went out.
La morgaŭ diskutotaj proponoj jam troviĝas en la komuna dosierujo.
The proposals to be discussed tomorrow are already in the shared folder.
Estis forirontaj often implies an intention that circumstances interrupted. Diskutotaj presents the proposals as assigned for later discussion. A simple future merely predicts: ni foriros, oni diskutos la proponojn.
— Ĉu la kontrakto estas subskribota hodiaŭ? — Ne, la juristo ankoraŭ kontrolas ĝin.
— Is the contract due to be signed today? — No, the lawyer is still checking it.
This exchange asks about an arrangement, not only a guess about future time.
Adjectival, adverbial, and nominal readings
The same aspectual core appears under different word-class endings:
- verkanta / verkinta / verkonta aŭtoro describes the author;
- verkante / verkinte / verkonte relates a secondary action to the main verb;
- verkanto / verkinto / verkonto names a participant in the corresponding phase.
La verkinto de la raporto poste klarigis, kial ŝi forigis la tabelon.
The author of the report later explained why she removed the table.
Lexical convention can weaken the immediacy of the phase contrast. Komencanto normally means a beginner, and prezidanto an office-holder, not simply someone caught in one moment of beginning or presiding. The productive participial system remains visible, but established vocabulary contributes its own conventional meaning. See Lexicalized Participles.
Simple verbs are aspectually flexible
Esperanto does not require a progressive or perfect whenever English uses one. A simple tense leaves aspect to context:
Hieraŭ mi legis dum du horoj, poste mi promenis.
Yesterday I read for two hours, then I took a walk.
Legis can describe an extended past activity without estis leganta. Use the compound only when an internal phase or relation to another reference point is central:
Mi estis leganta, kiam la alarmo eksonis.
I was reading when the alarm went off.
Similarly, jam finis often communicates completion clearly without estas fininta. The pedagogical recommendation is economy: use participial compounds for a contrast that simple tense plus adverbs cannot express as clearly.
Historical dispute and current standard guidance
The interpretation of passive -at-/-it- generated a major historical dispute known as atismo versus itismo. The Akademio's official examination of Fundamenta usage supported the traditional completion-based distinction: -at- carries duration/repetition, while -it- carries completion/result. A reform-like atist analysis treats -at- more as simple contemporaneity regardless of completion.
Learners should follow the official and broadly taught phase contrast. Attested texts contain edge cases and lexicalized adjectives, but those do not justify collapsing -at- and -it- into tense labels. When a sentence remains ambiguous, add explicit adverbs or rewrite it actively.
Common Mistakes
Treating participial vowels as absolute tense
❌ Skribonte la leteron, ŝi tuj metis la finitan leteron en la koverton.
Incorrect phase sequence — -ont- says that the writing has not begun, so the letter cannot already be finished.
✅ Skribinte la leteron, ŝi tuj metis ĝin en la koverton.
Having written the letter, she immediately put it in the envelope.
Using -at- for a completed result
❌ La pasvorto estas ŝanĝata; vi povas nun ensaluti per la nova.
Incorrect for an already completed change — -at- presents the process as ongoing or repeated.
✅ La pasvorto estas ŝanĝita; vi povas nun ensaluti per la nova.
The password has been changed; you can now log in with the new one.
Forcing a progressive where a simple verb is natural
❌ Ĉiumatene mi estas trinki kafon antaŭ la laboro.
Incorrect — esti cannot take a bare infinitive to reproduce the English progressive.
✅ Ĉiumatene mi trinkas kafon antaŭ la laboro.
Every morning I drink coffee before work.
Ignoring the verb's lexical aspect
❌ La sola ŝlosilo estis trovata hieraŭ je la tria.
Incorrect for one completed discovery at a precise time.
✅ La sola ŝlosilo estis trovita hieraŭ je la tria.
The only key was found yesterday at three.
Key Takeaways
- Participles mark phase relative to a reference point, not absolute calendar tense.
- -ant-/-at- favors duration, internal view, and repetition; -int-/-it- completion and result; -ont-/-ot- intention, assignment, or imminence before an action.
- Lexical aspect and adverbs shape the final interpretation.
- Simple Esperanto tenses are aspectually flexible; use compound participial forms only when their extra contrast matters.
Related Topics
- The Six Participles: A System MapB1 — Map Esperanto's six participles by voice and relative time, then use them as adjectives, adverbs, nouns, and compound verb forms.
- Relative Time in ParticiplesC2 — Interpret participial time relative to the described situation, separating ongoing, completed, and prospective action from calendar tense.
- Choosing -AT- versus -IT-B2 — Choose -at- for an unfolding or repeated passive action and -it- for completion or its result, independently of the reference tense.
- Compound Active TensesB1 — Combine esti with active participles to express ongoing, completed, or prospective action relative to a chosen reference point.
- Compound Passive TensesB2 — Combine esti with passive participles to present an affected subject during, after, or before an action.
- Time Adverbials and TenseB1 — Coordinate tense with time words and phrases while distinguishing absolute, contextual, durational, and aspectual time reference.