Perfect Aspect (Ti) in Yoruba

In Brief

Yoruba uses ti before a verb to present an action as already completed, often with a result that matters now: Mo ti jẹun means “I have eaten.” The basic order is subject + ti + verb. In questions, that order remains the same: Ṣé o ti gbọ́? means “Have you heard?”

Overview

The perfect aspect describes an action as complete in relation to the situation being discussed. “Aspect” simply means the way a speaker presents an action—for example, as ongoing or as already complete. Yoruba commonly marks the perfect with ti, a small word placed before the verb.

This is an A2 pattern, but it is useful from the beginning of everyday conversation. You can use it to say that someone has left, a task is finished, food has been eaten, or news has arrived. Compare Mo ń jẹun (“I am eating”), where ń presents the action as ongoing, with Mo ti jẹun (“I have eaten”), where ti presents it as accomplished.

English-speaking learners should resist treating ti as a mechanical replacement for every English past tense. English distinguishes “I ate” from “I have eaten” through verb forms. Yoruba verbs do not conjugate that way: the verb remains unchanged, while context and particles such as ti supply the viewpoint. Use ti when “already done,” “has happened,” or the present result is central—not merely because an event occurred in the past.

How It Works

The core pattern

The beginner formula is:

Subject + ti + verb (+ object or other information)

The subject is the person or thing that performs the action. The verb expresses the action or state. An object is the person or thing affected by the action.

Yoruba	English	Structure
Mo ti jẹun.	I have eaten.	Mo + ti + jẹun
Ó ti lọ.	He/She has gone.	Ó + ti + lọ
A ti parí iṣẹ́ náà.	We have finished the work.	A + ti + parí + object
Wọ́n ti dé.	They have arrived.	Wọ́n + ti + dé

The subject changes, but ti and the verb do not. There is no equivalent of English have/has agreement:

Subject	Perfect phrase	Meaning
mo	mo ti lọ	I have gone
o	o ti lọ	you have gone
ó	ó ti lọ	he/she has gone
a	a ti lọ	we have gone
ẹ	ẹ ti lọ	you (plural or respectful) have gone
wọ́n	wọ́n ti lọ	they have gone

Tone marks matter in careful writing. In particular, o (“you”) and ó (“he/she”) are different pronouns even though learners may initially overlook the mark.

Statements and questions

A yes-or-no question can begin with ṣé. The perfect marker stays between the subject and the verb:

Ṣé + subject + ti + verb?

• Ṣé o ti jẹun? — Have you eaten?
• Ṣé wọ́n ti dé? — Have they arrived?
• Ṣé ẹ ti parí? — Have you finished? (addressing several people or one person respectfully)

The answer can repeat the full clause: Bẹ́ẹ̀ ni, mo ti jẹun (“Yes, I have eaten”). This is safer for a learner than trying to copy an English one-word auxiliary answer such as “I have,” because ti is not used as a free-standing substitute for the verb in the same way as English have.

Question words can also occur with the perfect construction:

• Kí ni o ti ṣe? — What have you done?
• Níbo ni ó ti lọ? — Where has he/she gone?

These sentences include focus patterns that deserve their own study. At this stage, notice only that ti still comes before the main verb.

Perfect meaning versus simple past time

A completed event and a past event often overlap, so translations cannot always show the full difference. The speaker’s viewpoint matters.

Yoruba	Natural English	Main viewpoint
Mo ti jẹun.	I have eaten.	The meal is already completed; perhaps I do not need food now.
Mo jẹun lánàá.	I ate yesterday.	A past event located by lánàá (“yesterday”).
Ó ti lọ.	He/She has gone.	The person is no longer here.
Ó lọ lánàá.	He/She went yesterday.	The sentence reports when the departure happened.

This is a useful contrast, not a rigid translation rule. Context can make several English renderings possible. Learn the Yoruba meaning first: ti asks the listener to view the event as already accomplished.

Saying “not yet”

The common pattern kò tíì + verb means “has/have not … yet”:

• Kò tíì dé. — He/She has not arrived yet.
• Adé kò tíì jẹun. — Adé has not eaten yet.
• A kò tíì parí. — We have not finished yet.

In this pattern, tíì is written with its tone marks in fully marked Yoruba. Do not build “not yet” by simply placing kò directly before affirmative ti. Treat kò tíì as a pattern worth learning as a unit. Its internal structure and its combinations with other aspect markers belong to more advanced study.

Examples in Context

The following examples show the perfect in ordinary situations: checking progress, sharing news, and explaining a present result.

Yoruba	English	Note
Mo ti jẹun.	I have eaten.	The speaker has already had food.
Ó ti lọ sí ilé.	He/She has gone home.	The departure has taken place.
A ti parí iṣẹ́ náà.	We have finished the work.	A completed task with a visible result.
Wọ́n ti dé ibẹ̀.	They have arrived there.	Current result: they are now there.
Ṣé o ti gbọ́?	Have you heard?	A yes-or-no question.
Ṣé ẹ ti rí i?	Have you seen it?	ẹ is plural or respectful “you.”
Bọ́lá ti ra ìwé náà.	Bọ́lá has bought the book.	A noun can be the subject.
Ọmọ náà ti sùn.	The child has fallen asleep.	The resulting state matters now.
Omi ti tán.	The water has run out.	A completed change with a present consequence.
Mo ti sọ fún un.	I have told him/her.	The message has already been given.
A ti múra.	We are ready / We have prepared ourselves.	English may prefer a result-state translation.
Kò tíì dé.	He/She has not arrived yet.	The expected event remains incomplete.
A kò tíì parí iṣẹ́ náà.	We have not finished the work yet.	Negative “not yet” pattern.
Kí ni o ti ṣe?	What have you done?	Perfect inside a question-word construction.

Notice that a natural English translation is not always word for word. A ti múra, for example, may be translated as “We are ready” because English foregrounds the resulting state, while the Yoruba construction presents the preparation as accomplished.

Common Mistakes

Putting ti after the verb

• Wrong: Mo jẹun ti.
• Right: Mo ti jẹun.
• Why: The perfect marker comes before the verb, immediately after the subject in the basic pattern.

Changing ti for different subjects

• Wrong: trying to invent different forms equivalent to English have and has
• Right: Mo ti lọ. Ó ti lọ. Wọ́n ti lọ.
• Why: Yoruba ti does not change with person or number, and the verb lọ also remains unchanged.

Using ti for every past event

• Less suitable for a plain dated report: Mo ti jẹun lánàá when the only intended point is “I ate yesterday.”
• Clear dated report: Mo jẹun lánàá.
• Why: ti highlights completion or an achieved result. A bare verb plus a clear past-time expression can simply report a past event. Context may license both, but they do not always carry the same emphasis.

Copying English question order

• Wrong: moving ti ahead of the subject as though it were English have: Ti o jẹun?
• Right: Ṣé o ti jẹun?
• Why: With ṣé, keep the normal sequence subject + ti + verb.

Forming “not yet” as kò ti

• Wrong: Ó kò ti dé for “He/She has not arrived yet.”
• Right: Kò tíì dé. or Ó kò tíì dé.
• Why: “Not yet” uses the established kò tíì pattern. Also note that Yoruba commonly omits a third-person singular pronoun when the negative marker already carries that role; with an explicit subject, as in Adé kò tíì dé, the subject comes first.

Ignoring tone marks in writing

• Risky: O ti lo.
• Clear: Ó ti lọ.
• Why: Without tone marks, o/ó and lo/lọ can be ambiguous or represent different words. Many informal messages omit marks, but learners should practise the fully marked forms.

Usage Notes

Ti is common in both speech and writing. It is especially natural when speakers check whether something is done (Ṣé o ti parí?), announce a changed situation (Omi ti tán), or explain why the present situation is the way it is (Ó ti lọ).

English translations vary with context. Yoruba Ó ti kú is naturally “He/She has died,” while Ọmọ náà ti sùn may be “The child has fallen asleep” rather than the awkward “has slept.” A good translation expresses the completed change and its result instead of preserving one English tense at all costs.

Do not confuse perfect ti with every other written occurrence of ti/tí. Yoruba has other grammatical words with similar spelling, and tone marking helps distinguish them. Position is also a clue: in the simple perfect construction, ti follows the subject and directly precedes the verb.

Beyond the Basics: Marker Combinations

You do not need to master this section at A2, but you will encounter ti next to other aspect markers. Yoruba can layer markers to present both completion and an action’s internal course. For example:

• Mo ti ń ṣe é. — I have been doing it.
• Wọ́n ti ń retí rẹ̀. — They have been expecting you.

Here, ti places the situation in a completed or established time frame, while ń presents the activity as ongoing within that frame. The sequence is subject + ti + ń + verb, not subject + ń + ti + verb.

In a past narrative, context can lead English to use “had” rather than “have”: Mo ti ń ṣe é nígbà tí ó dé can mean “I had been doing it when he/she arrived.” This does not mean that ti mechanically equals either English have or had. Yoruba aspect and the surrounding time context work together, while English chooses a tense form in translation.

The negative kò tíì also belongs to this wider system. At beginner level, learn it as “not yet.” Later, compare it carefully with positive ti and with combinations such as ti ń rather than trying to derive every advanced form from English tense labels.

Practice Tips

1. Build three-part sentences. Choose a subject, add ti, and finish with a familiar verb: Mo ti dé, Ó ti jẹun, Wọ́n ti lọ. Then change only the subject and notice that ti and the verb stay fixed.
2. Practise result-based situations. Imagine an empty plate, a finished task, or an absent friend. Say Mo ti jẹun, A ti parí, or Ó ti lọ. Connecting the form to a visible result is more useful than memorising “ti = have.”
3. Use question-and-answer pairs. Ask Ṣé o ti jẹun?, Ṣé o ti gbọ́?, and Ṣé o ti parí? Answer with a full clause, then make a “not yet” answer with kò tíì where appropriate.

Related Concepts

• Prerequisite: Progressive Aspect (Ń) — compare an ongoing action with one presented as already complete.
• Next step: Complex Aspect Combinations — develops combinations such as ti ń and the negative pattern kò tíì in greater depth.