Temporal Clauses and Sequencing in Yoruba

In Brief

Yoruba relates events in time with connectors such as nígbà tí “when,” ṣáájú kí ... tó “before,” lẹ́yìn tí “after,” and títí ... fi “until.” The verbs themselves do not acquire English-style endings such as -ed; markers including ti “already/completed” and ń “in progress” help show whether one event was finished or still unfolding.

Overview

A temporal clause is a part of a sentence that places one event in relation to another: it tells you when, before what, after what, or until what something happens. It is a subordinate clause (a sentence-like unit that supports the main message rather than standing as that message on its own). In Nígbà tí mo dé, ó ti lọ, “when I arrived” supplies the time frame, while “he/she had left” is the main message.

At B1, these patterns let you turn a list of disconnected actions into a clear account. They are useful when giving directions, arranging plans, explaining routines, and telling stories. The order of the clauses often mirrors the order in which a speaker wants the listener to process the events, but it does not always mirror chronological order: “Before you leave, eat” mentions leaving first even though eating happens first.

English speakers should pay special attention to aspect (how an action is viewed—as completed, ongoing, or repeated). English often changes the verb or adds “had,” “was,” and “will.” Yoruba commonly keeps the verb unchanged and places a marker before it. Accurate sequencing therefore depends on both the connector and the aspect marker.

How It Works

The two-clause frame

Most examples have a time clause and a main clause. The time clause may come first for framing, or later when the main instruction or event deserves first place.

Relationship	Common Yoruba frame	Core meaning
when	nígbà tí + subject + predicate	at the time that
before	ṣáájú kí + subject + tó + predicate	before an event reaches its point
after	lẹ́yìn tí + subject + predicate	following an event
until	main clause + títí + endpoint clause, often with fi	continuing up to an endpoint
as/while	bí + subject + ti ń + predicate	as an event was unfolding

A predicate is what is said about the subject, usually beginning with a verb or an aspect marker plus a verb. Yoruba normally retains subject–verb–object order inside each clause.

Nígbà tí: “when” and “at the time that”

Use nígbà tí to provide a time frame. The event can be completed or ongoing:

• Nígbà tí mo dé, ó ti lọ. — “When I arrived, he/she had left.”
• Nígbà tí mo dé, ó ń ṣe oúnjẹ. — “When I arrived, he/she was cooking.”

The contrast comes from the second clause. Ti presents the leaving as already complete; ń presents the cooking as in progress. Without an overt aspect marker, context and time expressions do more of the interpretive work.

For an expected or recurring event, bá can occur in a time clause: Nígbà tí o bá dé, pè mí means “When you arrive, call me.” Here the arrival is not stated as a completed fact. The pattern can also have a “whenever” reading in a repeated context. Do not assume that every English “when” requires bá; it is the kind of event and context that matter.

Ṣáájú kí ... tó: “before”

A dependable pattern before a full clause is:

ṣáájú kí + subject + tó + verb phrase

• Ṣáájú kí o tó lọ, jẹun. — “Before you go, eat.”
• A ti dé ṣáájú kí òjò tó bẹ̀rẹ̀. — “We had arrived before the rain began.”

Learn kí ... tó as part of the full clausal frame rather than trying to match each element to one English word. If “before” is followed by a noun rather than a clause, ṣáájú can stand directly before it: ṣáájú ìpàdé “before the meeting.” A noun phrase (a noun and the words grouped with it) has no subject–predicate structure, so it does not need the full clausal pattern.

Lẹ́yìn tí: “after”

Use lẹ́yìn tí before a clause:

• Lẹ́yìn tí wọ́n ti jẹun, wọ́n lọ. — “After they ate, they left.”
• Mo sinmi lẹ́yìn tí mo parí iṣẹ́. — “I rested after I finished the work.”

A completed first event is naturally compatible with ti, as in wọ́n ti jẹun. However, do not insert ti merely because English contains “after.” The context may already make completion clear, and the precise aspect intended by the speaker still controls the choice.

Before a noun phrase, use lẹ́yìn without tí: lẹ́yìn ìpàdé “after the meeting,” lẹ́yìn ọ̀sẹ̀ méjì “after two weeks.” This clause-versus-noun contrast is useful to memorize:

Followed by a noun phrase	Followed by a clause
ṣáájú ìpàdé — before the meeting	ṣáájú kí ìpàdé tó bẹ̀rẹ̀ — before the meeting begins
lẹ́yìn ìpàdé — after the meeting	lẹ́yìn tí ìpàdé parí — after the meeting ended

Títí ... fi and títí di: “until”

Títí marks a stretch continuing to a limit. When the limit is an event, a common frame uses fi in the endpoint clause:

• Dúró títí mo fi padà. — “Wait until I return.”
• Wọ́n ṣiṣẹ́ títí òru fi dé. — “They worked until night came.”

The first action continues, or the first state remains valid, up to the event after títí. Treat títí ... fi as a construction; translating only the English word “until” encourages learners to omit part of the Yoruba frame.

When the endpoint is a named time rather than a clause, títí di is useful: títí di ọ̀la “until tomorrow,” títí di aago márùn-ún “until five o’clock.”

Bí ... ti with an unfolding event

The frame bí + subject + ti ń + verb can present the way or circumstances in which an event unfolds and can be translated “as” or “while” in the right context:

• Bí mo ti ń lọ sí ọjà, mo rí Adé. — “As I was going to the market, I saw Ade.”

The ń is important to the “was going” reading because it marks the background activity as ongoing. Bí ... ti has uses beyond time, including “how” or “the way that,” so it is not simply a universal replacement for English “while.” If your only goal is to state a time, nígbà tí may be clearer.

Sequencing with aspect

Connectors establish the relationship; aspect sharpens it.

Marker	View of the event	Example
ti	already completed	ó ti lọ — he/she had already left
ń	unfolding at the reference time	ó ń jẹun — he/she was eating
máa ń	regular or habitual	ó máa ń pè mí — he/she usually calls me
máa / yóò	prospective or future	a máa lọ / a yóò lọ — we will go
bá	expected, conditional, or recurring setting	nígbà tí o bá dé — when you arrive / whenever you arrive

Yoruba ti does not mechanically equal English “had.” In a past narrative, English may choose “had left”; in a present conversation, the same completed viewpoint may be translated “has left.” Translate the relationship, not one marker in isolation.

Examples in Context

Yoruba	English	Note
Nígbà tí mo dé, ó ti lọ.	When I arrived, he/she had left.	Ti marks the earlier completion.
Nígbà tí òjò ń rọ̀, a dúró sínú ilé.	While it was raining, we stayed inside the house.	An ongoing event provides the time frame.
Nígbà tí o bá dé, pè mí.	When you arrive, call me.	Expected future arrival.
Ṣáájú kí o tó lọ, jẹun.	Before you go, eat.	Full ṣáájú kí ... tó frame.
A ti dé ṣáájú kí wọ́n tó bẹ̀rẹ̀ ìpàdé.	We had arrived before they began the meeting.	The arrival is already complete.
Lẹ́yìn tí wọ́n ti jẹun, wọ́n lọ.	After they ate, they left.	The meal precedes the departure.
Mo máa pè ọ́ lẹ́yìn tí mo bá dé ilé.	I will call you after I get home.	A planned sequence.
Dúró títí mo fi padà.	Wait until I return.	The waiting lasts to an event.
Wọ́n ṣiṣẹ́ títí òru fi dé.	They worked until night came.	Nightfall is the endpoint.
Ilé ìtajà yóò ṣí títí di aago mẹ́jọ.	The shop will stay open until eight o’clock.	Títí di precedes a named time.
Bí mo ti ń lọ sí ọjà, mo rí Adé.	As I was going to the market, I saw Ade.	Background action plus a new event.
Lẹ́yìn ìpàdé, a lọ sí ilé.	After the meeting, we went home.	Lẹ́yìn is followed by a noun phrase.

Common Mistakes

Using tí alone for every English “when”

• Wrong: Tí mo dé, ó ti lọ.
• Right: Nígbà tí mo dé, ó ti lọ.
• Why: In this neutral time-frame meaning, learn nígbà tí as the connector. Tí has other major jobs, especially introducing relative clauses such as “the book that I read.”

Omitting the full “before” frame

• Wrong: Ṣáájú o lọ, jẹun.
• Right: Ṣáájú kí o tó lọ, jẹun.
• Why: A full clause after ṣáájú commonly uses kí ... tó. Direct ṣáájú is suitable before a noun phrase, as in ṣáájú ìpàdé.

Treating lẹ́yìn and lẹ́yìn tí as interchangeable

• Wrong: Lẹ́yìn mo parí iṣẹ́, mo sinmi.
• Right: Lẹ́yìn tí mo parí iṣẹ́, mo sinmi.
• Why: Use lẹ́yìn tí when what follows has its own subject and predicate; use lẹ́yìn directly before a noun phrase.

Dropping fi from a learned “until an event” pattern

• Wrong: Dúró títí mo padà.
• Right: Dúró títí mo fi padà.
• Why: Títí ... fi is a common clausal construction. Memorize the complete frame rather than mapping English “until” to títí alone.

Copying English tense forms instead of choosing Yoruba aspect

• Wrong idea: once nígbà tí means “when,” the event order is automatically complete.
• Right: Nígbà tí mo dé, ó ti lọ.
• Why: The connector supplies the time frame, but ti is what makes the earlier completion explicit here. Compare ó ń jẹun, where the action was still in progress.

Usage Notes

In conversation, the surrounding situation can make timing obvious, so speakers may not mark every distinction as explicitly as an exercise does. As a learner, however, using the complete frames helps avoid ambiguity and makes your intended sequence easy to follow.

Clause order changes emphasis more than basic chronology. Lẹ́yìn tí mo parí iṣẹ́, mo sinmi first establishes the time frame; Mo sinmi lẹ́yìn tí mo parí iṣẹ́ foregrounds the resting. Both can express the same order of events. A comma is helpful in writing when a longer time clause comes first, though punctuation does not create the grammatical relationship.

Tone marks and underdots are part of standard Yoruba spelling, not optional decoration. Forms such as tí, ti, ń, ṣáájú, and lẹ́yìn should be learned with their marks. In informal digital writing, marks are sometimes omitted, but that can hide distinctions which are valuable to learners and readers.

English “while” is broader than any single Yoruba form. Depending on the intended meaning, a speaker may frame an ongoing time with nígbà tí ... ń ... or describe an unfolding circumstance with bí ... ti ń .... Choose a construction from the meaning of the whole sentence, not from an isolated English connector.

Beyond the Basics / Advanced Use

In narrative, aspect markers allow a speaker to establish a reference time (the point from which events are viewed) and move around it. In Nígbà tí mo dé, ó ti lọ, arrival is the reference point and leaving lies before it. In Nígbà tí mo dé, ó ń jẹun, arrival interrupts or overlaps with an ongoing scene. This completed-versus-ongoing contrast is often more informative than trying to assign each Yoruba sentence one fixed English tense label.

Recurring time relationships frequently combine a temporal frame with habitual marking: Nígbà tí mo bá dé ilé, mo máa ń sinmi can mean “Whenever I get home, I usually rest.” Here bá helps set up each relevant occasion, while máa ń characterizes the repeated main event. A future plan may instead use a future marker in the main clause: Nígbà tí o bá dé, a máa lọ — “When you arrive, we will go.”

Also keep temporal tí distinct from relative tí. Compare nígbà tí mo dé “when I arrived” with ọjọ́ tí mo dé “the day that I arrived.” The second expression modifies the noun ọjọ́ “day”; it does not use the fixed connector nígbà tí. Recognizing this overlap will make longer texts much easier to parse.

Finally, bí ... ti often describes manner or degree rather than literal simultaneity. Context decides whether natural English says “as,” “while,” or “how.” Advanced reading requires recognizing that range, but B1 learners can produce clear time relationships first with nígbà tí, then add bí ... ti ń for an event visibly unfolding in the background.

Practice Tips

1. Build three-way contrasts around one moment: ó ti lọ “had left,” ó ń lọ “was going,” and ó máa lọ “will go.” Put each after the same nígbà tí clause and explain how the timeline changes.
2. Retell a simple routine with four cards labelled ṣáájú, nígbà tí, lẹ́yìn tí, and títí. Say the same sequence once with the time clause first and once with it last.
3. Listen for complete frames, not isolated words. Write down ṣáájú kí ... tó and títí ... fi with the words between them; this trains you to hear constructions that English represents with one connector.

Related Concepts

• Prerequisite: Conjunctions and Connectors — reviews how Yoruba joins words and clauses before you add precise time relationships.