Complex Clause Structures in Yoruba

In Brief

Long Yoruba sentences are built from a small set of reusable links. tí attaches a description to a noun, pé introduces a complete thought or report, bí … bá frames a condition, and ni focuses or identifies an element. Read each marker as the boundary of a clause, and keep aspect markers such as ń and ti with the verb phrase they belong to.

Overview

A clause is a group of words that makes a statement about someone or something. It normally has a subject—the person or thing being discussed—and a predicate, the action, state, or description given about that subject. Yoruba can put one clause inside another, attach several descriptions to the same noun, or link a chain of actions without repeating every participant.

At C1, the difficulty is not memorising one new conjunction. It is keeping several familiar systems working at once: relative tí, complement pé, conditional bí … bá, focus ni, aspect markers, pronoun reference, and serial verbs. Such combinations appear in formal argument, reporting, instructions, speeches, and careful storytelling. They are also possible in ordinary conversation, though speakers may divide a very long structure into shorter sentences.

An English sentence is not a reliable word-for-word template. English may use an infinitive (“to go”), a relative pronoun (“whom”), or several instances of “that”; Yoruba chooses a construction according to the job each clause performs. The most useful skill is therefore clause mapping: identify the main assertion first, then identify every clause that describes, reports, conditions, explains, or sequences an event.

How It Works

1. Find the main clause before unpacking the rest

Consider:

Ọkùnrin tí mo rí tí ó sọ pé ó fẹ́ lọ ni bàbá rẹ̀.
“The man whom I saw who said he wanted to go is your father.”

Its outer frame is:

Ọkùnrin … ni bàbá rẹ̀.
“The man … is your father.”

Everything between ọkùnrin and ni bàbá rẹ̀ narrows down which man is meant. Reading the outer frame first prevents the embedded verbs rí, sọ, fẹ́, and lọ from competing in your mind as though they were all main verbs.

A useful parsing map is:

Layer	Yoruba unit	Function
Main identification	Ọkùnrin … ni bàbá rẹ̀	identifies the man as your father
First relative clause	tí mo rí	“whom I saw”
Second relative clause	tí ó sọ …	“who said …”
Complement clause	pé ó fẹ́ lọ	gives the content of what he said

2. Use tí to attach a clause to a noun

A relative clause is a clause that identifies or describes a noun: “the letter that arrived” or “the person whom I called.” In Yoruba, the noun comes first and tí introduces the describing clause:

• ìwé tí mo rà — the book that I bought
• ẹni tí ó pè mí — the person who called me
• ibi tí a ti pàdé — the place where we met

When the head noun—the noun being described—is the subject inside the relative clause, a subject pronoun commonly appears after tí: ẹni tí ó pè mí. When it is the object, the object position is left understood: ìwé tí mo rà, not a word-for-word copy of English “the book that I bought it.”

Several relative clauses may be nested or chained. Context and pronouns show what each clause describes:

Ọmọbìnrin tí mo mọ̀ tí ó ń ṣiṣẹ́ níbí ti dé.
“The young woman whom I know, who works here, has arrived.”

Here mo is the subject of “know,” while ó is the subject of “is working.” Maintaining those subjects makes the structure legible.

Yoruba may retain a preposition at the end of the relative clause where English often places it before “whom” in formal style:

ẹni tí mo fi lẹ́tà ránṣẹ́ sí
“the person to whom I sent the letter” / “the person I sent the letter to”

The final sí belongs to the relation selected by ránṣẹ́ sí. Do not remove it merely because its object is understood from ẹni.

3. Use pé for the content of speech, thought, or fact

A complement clause completes the meaning of another expression. After verbs such as sọ “say,” gbọ́ “hear,” mọ̀ “know,” and rò “think,” pé can introduce the content:

• Ó sọ pé òun máa dé. — He/she said that he/she would arrive.
• Mo mọ̀ pé wọ́n ti lọ. — I know that they have left.
• A gbọ́ pé ìpàdé náà ti bẹ̀rẹ̀. — We heard that the meeting had started.

Unlike English, which can sometimes omit “that,” keeping pé is especially helpful when a sentence already contains several clauses. It marks a clean transition from the reporting expression to the reported proposition.

Pronoun choice matters in reported discourse. Yoruba can use òun to refer back to a third-person participant already prominent in the discourse, often helping distinguish that person from another ó “he/she.” The exact reference still depends on context, so repeat a name or noun when two possible antecedents would make the sentence ambiguous.

A pé-clause can itself contain relatives, aspect, focus, or another complement:

Olùdarí náà sọ pé ìwé tí a ń dúró de ti dé.
“The director said that the book we have been waiting for has arrived.”

4. Build conditions with bí … bá

A common conditional frame is bí “if” followed by bá in the conditional clause:

Bí o bá rí Adé, sọ fún un pé mo ti dé.
“If you see Adé, tell him that I have arrived.”

The condition can contain a relative clause, while the result can contain a complement:

Bí o bá rí ẹni tí mo fi lẹ́tà ránṣẹ́ sí, sọ fún un pé mo ti dé.

Break it into three blocks:

1. Bí o bá rí ẹni … — if you see the person …
2. tí mo fi lẹ́tà ránṣẹ́ sí — to whom I sent the letter
3. sọ fún un pé mo ti dé — tell that person that I have arrived

English speakers sometimes notice only bí and forget bá. Learn the whole frame as a pair. Also remember that bá has other uses elsewhere; its function here comes from the conditional construction.

5. Keep aspect inside the correct clause

Aspect shows how an event unfolds—for example, as ongoing, completed, or habitual—rather than simply locating it on a timeline. In a complex sentence, each clause can have its own aspect:

Marker	Core value in these structures	Example
ń	ongoing/progressive action	ẹni tí ó ń kọrin — the person who is singing
ti	completed or already-realised situation	Mo mọ̀ pé ó ti dé. — I know that he/she has arrived.
máa	habitual, prospective, or expected action, depending on context	Ó sọ pé òun máa padà. — He/she said that he/she would return.

Place the marker directly before the predicate it modifies. In Mo mọ̀ pé Kẹ́mi ti dé, ti belongs to dé inside the complement; it does not mark the knowing as completed. In Ẹni tí ó ń sọ̀rọ̀ náà ti dé, ń belongs to “speak,” while ti belongs to the main predicate “arrive.”

Do not force English tense matching onto Yoruba. Interpret each clause from its aspect marker, time expressions, and discourse context. A reported clause does not mechanically change form merely because the reporting verb is understood as past.

6. Link closely related actions with serial verbs

A serial verb construction places two or more verbs in one clause to describe connected parts of a single event. They generally share a subject, and no English-style “and” is required between every verb:

• Ó lọ ra oúnjẹ. — He/she went to buy food.
• Ó gbé ìwé náà fún mi. — He/she took/gave the book to me.
• Mo fi ọ̀bẹ gé iṣu náà. — I used a knife to cut the yam.

The verbs form an event chain: movement plus purpose, transfer, or instrument plus action. This differs from embedding with pé, which introduces a proposition that can have its own explicit subject. Compare:

• Ó lọ ra oúnjẹ. — one participant carries out a linked sequence
• Ó sọ pé Adé ra oúnjẹ. — the content of “said” is a separate clause with subject Adé

If the subject changes, state the new subject and use the connector appropriate to the meaning. Do not stretch a serial construction across unrelated actions simply to avoid a conjunction.

7. Combine focus with embedded clauses

Yoruba commonly uses ni in a focus construction. Focus means presenting one element as the identifying, contrasting, or especially informative part of the message:

Adé ni mo rí.
“It was Adé that I saw.”

A noun-like relative expression can be focused:

Ohun tí ó ṣe pàtàkì jùlọ ni pé a gbọ́dọ̀ ṣiṣẹ́.
“What is most important is that we must work.”

The outer pattern is X ni Y. Here X is the relative expression ohun tí ó ṣe pàtàkì jùlọ “what is most important,” while Y is the pé-clause. English may use “is that,” but do not treat ni pé as one indivisible word. ni performs the identifying/focus function; pé opens the clause that supplies the content.

Focus may also interact with a relative clause:

Ìwé tí Bọ́lá kọ ni mo rà.
“It was the book that Bọ́lá wrote that I bought.”

This order is not just decorative. It highlights that particular book, rather than merely reporting Mo ra ìwé tí Bọ́lá kọ “I bought the book that Bọ́lá wrote.”

Examples in Context

Yoruba	English	Note
Ọkùnrin tí mo rí tí ó sọ pé ó fẹ́ lọ ni bàbá rẹ̀.	The man whom I saw who said he wanted to go is your father.	Two relative clauses, then a pé-complement and ni identification.
Bí o bá rí ẹni tí mo fi lẹ́tà ránṣẹ́ sí, sọ fún un pé mo ti dé.	If you see the person I sent the letter to, tell him/her that I have arrived.	Conditional, relative clause, and reported content.
Ohun tí ó ṣe pàtàkì jùlọ ni pé a gbọ́dọ̀ ṣiṣẹ́.	What is most important is that we must work.	A noun-like relative expression is identified with a pé-clause.
Ọmọbìnrin tí mo mọ̀ tí ó ń ṣiṣẹ́ ní ilé ìwòsàn ti dé.	The young woman whom I know, who works at the hospital, has arrived.	ń marks the embedded ongoing situation; ti marks the main event as completed.
Mo mọ̀ pé ìwé tí o ń wá wà lórí tábìlì.	I know that the book you are looking for is on the table.	A relative clause sits inside a pé-complement.
Olùkọ́ náà sọ pé àwọn akẹ́kọ̀ọ́ tí wọ́n ti parí iṣẹ́ lè lọ.	The teacher said that the students who have finished the work may leave.	Completed aspect appears inside the relative clause.
Bí wọ́n bá gba àbá tí a fi ránṣẹ́ sí wọn, a máa bẹ̀rẹ̀ iṣẹ́ lọ́la.	If they accept the proposal we sent them, we will begin the work tomorrow.	A relative clause expands the object in the condition.
Ẹni tí ó ń bá ọ sọ̀rọ̀ ni mo fẹ́ pàdé.	It is the person who is speaking with you that I want to meet.	A relative expression is focused before ni.
Ìwé tí Bọ́lá kọ ni mo rà, kì í ṣe èyí tí Adé kọ.	It was the book Bọ́lá wrote that I bought, not the one Adé wrote.	Focus supports an explicit contrast.
Ó lọ sí ọjà ra èso mú un wá sí ilé.	He/she went to the market, bought fruit, and brought it home.	A serial chain presents closely connected actions.
Mo fi kọ̀ǹpútà kọ lẹ́tà náà, mo sì fi í ránṣẹ́ sí ọ́.	I wrote the letter on a computer and sent it to you.	fi introduces means in linked actions; sì coordinates the next clause.
A gbọ́ pé ẹni tí wọ́n yàn láti darí ìgbìmọ̀ náà ti kọ̀wé fipò sílẹ̀.	We heard that the person chosen to lead the committee has resigned in writing.	Formal reporting with a relative clause inside the complement.

Common Mistakes

Treating every English “that” as pé

• Wrong: Ìwé pé mo rà dára.
• Right: Ìwé tí mo rà dára.
• Why: The clause describes ìwé, so it is relative and takes tí. Use pé for the content of saying, knowing, thinking, or a similar proposition.

Adding an object pronoun inside an object relative clause

• Wrong: Ìwé tí mo rà á dára.
• Right: Ìwé tí mo rà dára.
• Why: In the standard pattern, ìwé is already understood as the object of rà. Do not automatically copy English resumptive “it” into the gap.

Dropping a required preposition at the end

• Wrong: Ẹni tí mo fi lẹ́tà ránṣẹ́ …
• Right: Ẹni tí mo fi lẹ́tà ránṣẹ́ sí …
• Why: The expression is ránṣẹ́ sí “send to.” The person is understood, but sí still expresses the relationship.

Forgetting bá in a conditional frame

• Wrong: Bí o rí i, sọ fún mi.
• Right: Bí o bá rí i, sọ fún mi.
• Why: For the regular hypothetical “if” pattern taught here, learn bí … bá as a frame rather than translating only English “if.”

Letting an aspect marker drift to the wrong verb

• Wrong: Mo ti mọ̀ pé ó dé when the intended meaning is “I know that he/she has arrived.”
• Right: Mo mọ̀ pé ó ti dé.
• Why: ti stands before the predicate whose completion it marks. The arrival, not the knowing, is completed in the intended message.

Making pronoun reference needlessly ambiguous

• Unclear: Adé sọ fún Kúnlé pé ó máa lọ.
• Clearer: Adé sọ fún Kúnlé pé òun máa lọ. / Adé sọ fún Kúnlé pé Kúnlé máa lọ.
• Why: With two third-person participants, ó may not tell the listener which person is meant. Use òun, repeat the noun, or recast the sentence according to the intended reference.

Usage Notes

Clarity is more important than maximum length

Formal Yoruba permits substantial embedding, but a grammatically possible sentence is not always the best sentence. If two successive tí-clauses could attach to different nouns, repeat the noun, choose a clearer pronoun, or make a new sentence. Punctuation helps the reader, but it cannot repair unclear reference.

Tone marks carry real information

In careful writing, retain tone marks and underdots: tí, ti, ń, sí, sọ, and ṣí are not interchangeable shapes. This matters especially in complex clauses, where a reader uses short markers to find structure. Informal digital writing often omits diacritics, but learners should first master the fully marked forms.

Speech may be less tightly packed

Conversation often uses pauses, repetition, or separate sentences where edited prose uses embedding. A speaker may also omit tí in some casual relative constructions, but explicit tí is the safer choice in formal prose and in any sentence where the clause boundary could be missed. Advanced fluency includes knowing when not to compress every idea into one sentence.

Translate functions, not punctuation

An English comma, infinitive, or “and” does not dictate a Yoruba connector. Ask whether the relationship is description (tí), propositional content (pé), condition (bí … bá), focus (ni), close event sequencing (serial verbs), or ordinary coordination. One English sentence may naturally become two Yoruba sentences, and the reverse is also possible.

Beyond the Basics / Advanced Use

Relative expressions can behave like noun phrases

Forms such as ẹni tí … “the person who …,” ohun tí … “what/the thing that …,” and ibi tí … “where/the place that …” can fill the same positions as a noun phrase: subject, object, or focused element.

• Ohun tí mo fẹ́ ni àlàáfíà. — What I want is peace.
• Mo mọ ibi tí wọ́n ti pàdé. — I know where they met.

The ti in ibi tí wọ́n ti pàdé after wọ́n is not another relative marker: the accented tí introduces the relative clause, while the later ti participates in the locative pattern. Accurate diacritics and clause-by-clause parsing keep the two apart.

Scope determines meaning

Scope means the part of the sentence affected by a marker. Compare a completed event in the main clause with one in an embedded clause:

• Mo ti gbọ́ pé ó dé. — I have already heard that he/she arrived.
• Mo gbọ́ pé ó ti dé. — I heard that he/she has arrived.

The forms differ only in the position of ti, but the completion applies to a different predicate. The same principle governs negation, modality, and focus: place and interpret each marker within its own clause.

Information structure shapes formal argument

Focus is useful when a writer moves from a broad issue to the decisive point:

Ohun tí a nílò ni pé kí gbogbo wa fọwọ́ sowọ́ pọ̀.
“What we need is for all of us to cooperate.”

Here the relative expression establishes the topic to be identified, and the material after ni supplies the central claim. Repeated too often, this pattern can sound heavy; used selectively, it gives an argument a clear rhetorical spine.

Not every sequence is a serial verb construction

True serial sequences present tightly integrated events and normally preserve a shared participant structure. Independent claims, changes of subject, explanations, and contrasts need overt clause linking or separate sentences. Compare Ó lọ ra oúnjẹ “He/she went to buy food” with Ó lọ, ṣùgbọ́n Adé dúró “He/she left, but Adé stayed.” The second contains independent, contrasting clauses and cannot be reduced to a shared-subject serial chain.

Practice Tips

1. Bracket long sentences. Underline tí, pé, bí … bá, and ni. Then write the main clause on one line and each embedded clause beneath it. Translate only after you can name each link.
2. Build outward in stages. Start with Mo rí ọkùnrin “I saw the man.” Add tí ó ń ṣiṣẹ́ níbí, then place the whole noun phrase inside Mo mọ̀ pé …. Check the subject and aspect at every stage.
3. Practise reference aloud. Retell a short news item involving two people. Deliberately choose between ó, òun, a repeated name, and a noun such as ọkùnrin náà. Ask whether a listener could identify every participant without seeing your notes.

Related Concepts

• Prerequisite: Relative Clauses (Tí) — establishes the basic noun + tí + clause pattern used throughout complex embedding.