The Six Participles: A System Map

Esperanto's participles form a two-by-three system. First choose voice: active participles describe the doer, while passive participles describe the receiver of a transitive action. Then choose the action's phase relative to a reference point: in progress (-ant-/-at-), already completed (-int-/-it-), or still ahead (-ont-/-ot-). The final -a, -e, or -o decides whether the result behaves as an adjective, adverb, or noun.

The complete six-form map

Using legi “read,” the core grid is:

The consonant tells you the voice: -nt- is active and -t- without n is passive. The vowel matches the simple tense series as a memory aid: a with -as, i with -is, and o with -os. But participles do not simply mean present, past, and future tense. They locate one action around a contextually chosen reference point.

Active versus passive: whose perspective?

An active participle describes the semantic subject—the participant performing or experiencing the verb. A passive participle describes the semantic object—the participant affected by a transitive action.

In atendanta paciento, the patient waits. In atendata mesaĝo, someone waits for the message. English often uses an -ing or -ed form, but those surface endings are unreliable guides: identify the participant's role before choosing Esperanto voice.

Passive participles require a verb that can take a real direct object. Okazi, dormi, and verbs in -iĝi are intransitive in their core uses, so forms such as okazata, dormita, or komenciĝita are not ordinary standard participles. A duration accusative or directional accusative is not an object and cannot license a passive.

Relative phase, not calendar tense

The reference point may be now, a past moment, or a future moment. Consider three states at yesterday's meeting:

All three reference points are past because estis places the description in the past. The participle then locates the writing relative to that past point: ongoing, completed beforehand, or still intended. This is why calling -int- simply “past” and -ont- simply “future” is inadequate.

The “present” pair -ant-/-at- primarily expresses an unfinished, continuing, or repeated phase, not merely clock-time present. The “future” pair often adds intention, preparation, imminence, or an assigned task.

Here legotaj presents the articles before their reading and naturally suggests that the reading is planned or required.

Adjectival participles in -a

Add -a when the participle directly describes a noun or follows esti as a description. Like other adjectives, it agrees in number and accusative case.

Both subskribitajn and ŝlosita are passive -it- participles, but only the first is plural and accusative because it agrees with kontraktojn. The second describes nominative singular tirkesto inside the place phrase.

Venontaj is active: the guests will come. Ĝisdatigitan is passive: someone has updated the program.

Participle adjectives range from fully eventive to lexicalized. Fermita pordo transparently evokes a completed closing; familiar words such as konata “known” may behave much like ordinary adjectives. Lexicalization does not change agreement.

The dedicated Adjectival Participles in -a page develops agreement and lexicalization in detail.

Adverbial participles in -e

An -e participle compresses a secondary action whose understood subject is normally the subject of the main verb. It does not agree.

The endings preserve the same phase contrast: atendante is simultaneous and ongoing, fininte is completed before the main action, and forironte is prospective at the main action's reference time.

Passive adverbial participles are also possible when the main subject receives the secondary action:

This construction is common in (formal) journalism and compact written prose. In conversation, a full clause such as Kiam oni demandis la ministron... may be easier to process.

Nominal participles in -o

An active -o participle normally names a person in the subject role; a passive one names a person in the object role.

Preleganto and aŭskultantoj are active participants; arestito is the person who has been arrested. These nouns take ordinary -j and -n endings when required.

For a nonhuman product of an action, Esperanto normally uses -aĵ- or a conventional root rather than mechanically using a bare person-denoting participle: skribaĵo or skribitaĵo for a written item. There are established technical and lexical exceptions, but the person reading is the safest default for bare leganto.

Compound active forms

Combining esti with an active participle gives explicit relative-phase forms: estas leganta, estis leginta, estos legonta, and further combinations. They are grammatical, but everyday Esperanto generally prefers a simple finite verb unless the phase contrast matters.

Estis sendonta is valuable because it reports an intention poised before realization—and the sending did not occur. By contrast, ordinary mi legis hieraŭ usually needs no heavier mi estis leganta hieraŭ. The latter deliberately foregrounds duration or an interrupted background action.

Compound passive forms

Esperanto normally builds analytic passive voice with esti + passive participle. The form of esti locates the descriptive reference point; -at-/-it-/-ot- selects the action's phase.

This minimal contrast is about phase: work in progress, work completed with a resulting state, or work still ahead. With -it-, context decides whether English prefers “has been repaired” or “is repaired.” Passive -it- emphasizes completion or result and is not mechanically an English perfect tense.

Agents, when useful, normally appear with de: la raporto estis verkita de la komisiono. Esperanto often sounds clearer in the active if the agent matters: la komisiono verkis la raporton.

Keep compound chains proportionate

The system can theoretically produce forms such as estos estinta skribanta, but grammatical possibility is not communicative wisdom. Multiple layers force the reader to track several reference points. Neutral contemporary usage favors simple verbs, time adverbs, or subordinate clauses whenever they express the same contrast clearly.

This is usually clearer than an elaborate future-perfect participial chain. (academic) or (formal) prose may use a compound form when the exact relation is analytically important; (literary) prose may use one for rhythm or viewpoint. The register label does not rescue an unnecessary chain.

Norm and accepted use

All six suffixes -ant-, -int-, -ont-, -at-, -it-, -ot- are foundational parts of Esperanto. Adjectival and adverbial participles, and passive forms with esti, occur in the Fundamento itself. Modern usage productively extends them to new verbs while respecting valency.

Experimental -unt-/-ut- forms intended to correspond to -us are (nonstandard) and not part of official Esperanto. Use a conditional clause or ordinary -us form instead. The pedagogical recommendation is to master the official six-cell grid before exploring rare stylistic experiments.

Common Mistakes

Treating -int- as past tense regardless of reference point

Choosing active voice for the receiver

Making a passive participle from an intransitive verb

Leaving an adverbial participle attached to the wrong subject

Copying an English auxiliary chain

Key Takeaways

• Choose voice first: -nt- describes the doer; passive -t- describes the affected object.
• Then choose phase relative to a reference point: a in progress, i completed, o still ahead.
• Add -a for adjective behavior, -e for an adverbial secondary action, or -o for a participant noun.
• Use esti + participle when its phase contrast earns the extra structure; otherwise prefer a simple verb.
• Passive participles require genuine transitivity, and adverbial participles normally share the main clause's subject.