This original conversation follows two friends as they turn a general wish into a workable Saturday plan. Esperanto separates three ideas that English often blends: future -os predicts or schedules what will happen, voli presents what someone wants, and povi presents what circumstances, ability, or permission make possible.
The broader tense rule appears in The Future in -OS; this reading shows how that form interacts with intentions and availability in one conversation.
Complete conversation
Mira: Ĉu vi jam havas planon por sabato?
Jonas: Matene mi laboros hejme, sed posttagmeze mi volas iri al la lago. Ĉu vi volas veni kun mi?
Mira: Volonte, sed mi povas ekiri nur post la dua. Je la tria mi estos libera.
Jonas: Bone. Ni renkontiĝos antaŭ la biblioteko je kvarono post la tria.
Mira: Perfekte. Mi kunportos ion por manĝi. Ĉu ni revenos la saman vesperon?
Jonas: Jes, la lasta buso foriros je la oka. Se pluvos, ni povos anstataŭe viziti la novan ekspozicion.
Mira: Konsentite. Mi skribos al vi sabate matene, se la prognozo ŝanĝiĝos.
The exchange is (informal) but internationally neutral: two friends negotiate desires, availability, and a backup plan. Nothing depends on a culture-specific weekend schedule; the speakers make the time explicit precisely because their routines may differ.
Opening with an existing plan
Ĉu vi jam havas planon por sabato?
Do you already have a plan for Saturday?
Ĉu turns the statement vi jam havas planon into a yes–no question. Jam asks whether the expected development has happened by now. Por sabato connects the plan to its intended day. The bare day name is standard after a preposition; no English-style capitalization rule is being copied here.
Fresh imitation:
Ĉu vi jam havas biletojn por dimanĉo?
Do you already have tickets for Sunday?
Future -os states the projected schedule
Matene mi laboros hejme, sed posttagmeze mi volas iri al la lago.
In the morning I will work at home, but in the afternoon I want to go to the lake.
Laboros carries future -os: Jonas presents the work as part of the projected Saturday schedule. Volas, by contrast, is present because his desire exists now. The desired action is the infinitive iri, whose understood subject is also Jonas. Esperanto does not use voli as a routine future auxiliary; “I will go” is mi iros, while mi volas iri means “I want to go.”
Matene and posttagmeze are adverbs answering “when?” They frame the two parts of the day without a preposition. Hejme similarly means “at home”; al la lago gives the destination.
Fresh imitation:
Dimanĉe mi ripozos, sed vespere mi volas kuiri por la familio.
On Sunday I will rest, but in the evening I want to cook for the family.
Voli shares its subject with the infinitive
Ĉu vi volas veni kun mi?
Do you want to come with me?
The subject vi belongs to both volas and veni. This same-subject relation is built into the ordinary voli + infinitive pattern. If Jonas wanted Mira to perform some action, a clause with ke and the -u form would be needed: Mi volas, ke vi venu.
Veni kun mi views the movement relative to Jonas's planned participation. In a different conversational viewpoint, iri kun mi could also be natural. The choice between veni and iri depends on the deictic center, not on the English word alone.
Fresh imitation:
Ĉu vi volas resti por vespermanĝo?
Do you want to stay for dinner?
Povi marks practical possibility
Volonte, sed mi povas ekiri nur post la dua.
Gladly, but I can set off only after two.
Volonte is an adverbial response meaning that the speaker accepts willingly. It is not a finite verb. Povas ekiri says that circumstances allow departure; nur post la dua limits the available time. The infinitive again shares the subject of the modal verb.
Je la tria mi estos libera.
At three I will be free.
The clock time takes je. The state itself is future, so esti becomes estos. English speakers sometimes use a present tense for a fixed plan, but explicit Esperanto -os is the clear neutral choice at this level.
Fresh imitation:
Mi povas telefoni nur post la sesa, ĉar ĝis tiam mi laboros.
I can call only after six because I will be working until then.
Detailed grammar recognizes that povi can express skill, physical capacity, permission, or circumstantial possibility. Here the scheduling phrase selects the last reading. If Mira lacked the skill to travel, the same verb would need different context.
Agreeing on an exact meeting time
Ni renkontiĝos antaŭ la biblioteko je kvarono post la tria.
We will meet in front of the library at a quarter past three.
Renkontiĝos is a reciprocal event: the two will meet one another. Antaŭ la biblioteko gives a static meeting point. Je kvarono post la tria gives 3:15—literally “at a quarter after the third [hour].” In many contexts je la tria kaj dek kvin is also understood, but the quarter expression is conventional and concise.
Fresh imitation:
La filmo komenciĝos je duono post la sepa, do ni renkontiĝu je la sepa.
The film will start at half past seven, so let's meet at seven.
Future actions and a question about return
Perfekte. Mi kunportos ion por manĝi. Ĉu ni revenos la saman vesperon?
Perfect. I will bring something to eat. Will we return the same evening?
Perfekte is an -e form evaluating the plan as a whole: “perfect” or “great.” It does not describe an omitted noun. Kunportos presents Mira's contribution as a settled future action. Ion is the object, and por manĝi states its intended use. In the question, revenos asks about a future event. La saman vesperon uses the accusative for a time point without a preposition: “that same evening.” It is not the object of revenos.
Fresh imitation:
Mi alportos akvon por trinki, kaj ni revenos hejmen antaŭ noktomezo.
I will bring water to drink, and we will return home before midnight.
A real condition and a backup plan
La lasta buso foriros je la oka.
The last bus will leave at eight.
The bus timetable is future relative to the conversation, hence foriros. Esperanto -os does not by itself say whether the information is a prediction, intention, or published schedule; context supplies that distinction.
Se pluvos, ni povos anstataŭe viziti la novan ekspozicion.
If it rains, we will be able to visit the new exhibition instead.
Both clauses refer to the future and therefore use -os: pluvos and povos. Unlike English, which normally says if it rains with a present form, Esperanto keeps the genuine future time in the se clause. Povos viziti means the alternative will be available, not necessarily that the speakers already want it most.
Fresh imitation:
Se la muzeo estos malfermita, ni povos eniri sen atendi ekstere.
If the museum is open, we will be able to go in without waiting outside.
Keeping the plan open
Konsentite. Mi skribos al vi sabate matene, se la prognozo ŝanĝiĝos.
Agreed. I will write to you on Saturday morning if the forecast changes.
Konsentite is a clause-level participial adverb: literally, the matter is “agreed,” with no need to name who agreed it. Sabate matene combines a day adverb with a part-of-day adverb. Ŝanĝiĝos uses -iĝ- because the forecast itself changes; no external changer is named. The closing line leaves one condition unresolved while preserving a clear next action.
Plan, intention, and promise are contextual
The future ending itself does not label a sentence as a promise. Mi skribos al vi can function as a prediction, a statement of plan, or a commitment. In this closing position, after the friends have negotiated what information is still needed, it is naturally heard as a commitment.
Mi kontrolos la horaron kaj poste konfirmos la precizan tempon.
I will check the timetable and then confirm the exact time.
If the speaker is describing desire rather than undertaking the action, voli remains necessary:
Mi volas iri kun vi, sed mi ankoraŭ ne povas promesi.
I want to go with you, but I still cannot promise.
The contrast is useful precisely because English will can express both future time and willingness. Esperanto normally lets -os establish future time and uses lexical verbs such as voli, intenci, or promesi when that attitude must be explicit.
Common Mistakes
Using voli as if it merely marked future time
❌ Morgaŭ mi volas labori de la oka ĝis la kvina.
Incorrect for a simple work schedule — volas adds desire or intention.
✅ Morgaŭ mi laboros de la oka ĝis la kvina.
Tomorrow I will work from eight until five.
Copying English present tense after se
❌ Se pluvos, ni povus viziti la muzeon morgaŭ.
Incorrect for the agreed real backup plan — povus makes the result merely hypothetical.
✅ Se pluvos, ni povos viziti la muzeon morgaŭ.
If it rains, we will be able to visit the museum tomorrow.
Omitting je before an exact clock time
❌ Ni renkontiĝos la tria.
Incorrect — an exact clock point normally takes je.
✅ Ni renkontiĝos je la tria.
We will meet at three.
Giving voli and its infinitive different subjects
❌ Mi volas vi venu kun ni.
Incorrect — a new subject requires a ke-clause and the -u form.
✅ Mi volas, ke vi venu kun ni.
I want you to come with us.
Key Takeaways
Use -os to place an event in the future, voli + infinitive to present a desire with the same subject, and povi + infinitive to present ability, permission, or practical possibility. Time expressions then anchor the plan: sabate/matene for broad periods, je for clock time, post for sequence, and ĝis for an endpoint. In real future conditions, Esperanto can use -os in both the se clause and its result.
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Start learning Esperanto →Related Topics
- The Future in -OSA2 — Use -os for actions and states expected after the relevant present, including in time and condition clauses where English uses a present form.
- Voli: To WantA2 — Use voli with noun objects, same-subject infinitives, and volitive ke-clauses for another person’s desired action.
- Povi: Can Or Be AbleA2 — Use povi with a same-subject infinitive for ability, circumstances, permission, and possibility, including epistemic and polite readings.
- Telling Clock TimeA1 — Ask and tell the time in Esperanto with ordinal hours, cardinal minutes, fractions, day-part expressions, and the correct time prepositions.
- Time and Frequency ExpressionsB1 — Use Esperanto's productive frames for clock time, recurring events, duration, and temporal sequence without importing English prepositions.
- Condition Clauses with SeB1 — Form open and real conditions with se, choosing each clause’s tense independently and distinguishing conditions from embedded questions.