Relative of Time (-po-/-lipo-) in Swahili

In Brief

Swahili often expresses “when” by placing the relative marker -po- inside the verb: nilipofika means “when I arrived,” anapohitaji means “when he or she needs,” and atakapokuja means “when he or she comes.” The form -lipo- is not one indivisible marker: in nilipofika, -li- marks the past and -po- supplies the time relationship.

Overview

The temporal relative is a compact way to make one event locate another event in time. A relative clause (a clause that identifies a person, thing, place, or time) is built into the Swahili verb itself. Instead of adding a separate word before an otherwise complete clause, as English usually does with “when,” Swahili adds -po- to the verb’s internal sequence.

This pattern appears constantly in instructions, stories, plans, and descriptions of repeated situations: “when you arrive,” “when I saw her,” “whenever they need help.” At B2, the important step is not only recognizing familiar forms such as alipokuja, but being able to build the pattern across past, present, future, and negative clauses.

The marker belongs to the same locative relative system as -ko- and -mo-. Historically and grammatically, these correspond to locative noun classes: -po- points to a definite point or place, -ko- to a more general or indefinite location, and -mo- to an interior. In ordinary temporal clauses, however, -po- is the productive marker meaning “when.” Do not treat -ko- and -mo- as freely interchangeable kinds of temporal “when.”

How It Works

The basic verb slot

In an affirmative finite verb, -po- normally follows the tense marker:

Meaning	Structure	Form
when I arrive / whenever I arrive	subject + -na- + -po- + verb	ni-na-po-fika
when I arrived	subject + -li- + -po- + verb	ni-li-po-fika
when you need	subject + -na- + -po- + verb	u-na-po-hitaji
when he/she comes (future)	subject + -taka- + -po- + verb	a-taka-po-kuja

A subject marker is the short piece at the beginning of the verb that shows who performs the action: ni- “I,” u- “you,” a- “he/she,” tu- “we,” m- “you plural,” or wa- “they.” A tense marker locates the action in time, such as -li- for past or -na- for present.

Consider the full analysis of the central examples:

• ni-li-po-fika: ni- “I” + -li- past + -po- “when” + fika “arrive”
• a-na-po-hitaji: a- “he/she” + -na- present/general + -po- “when” + hitaji “need”
• a-taka-po-kuja: a- “he/she” + relative-future -taka- + -po- + kuja “come”

This explains why calling -lipo- the temporal marker can be convenient but misleading. -lipo- is simply the common meeting of past -li- and relative -po-.

Past, present, and future

Time relationship	Pattern	Example	Natural English meaning
completed past	subject + -li-po- + root	tulipomaliza	when we finished
current or repeated	subject + -na-po- + root	unaposoma	when/whenever you study
future	subject + -taka-po- + root	watakapofika	when they arrive/will arrive

The future form deserves attention. In an independent statement, “they will arrive” is watafika. Before the relative marker, the future element normally appears as -taka-: wa-taka-po-fika. Forms such as watapofika are therefore not the standard pattern taught here.

English often uses a present form after “when” even for future time: “When they arrive, we will leave.” Swahili marks that future relationship explicitly: Watakapofika, tutaondoka. Avoid building the Swahili form by copying the English tense word for word.

Present event or general condition

A form in -napo- can describe an event happening in the relevant situation or one that recurs:

• Ninapopika, nasikiliza redio. — “When I cook, I listen to the radio.”
• Unapohitaji msaada, niambie. — “When you need help, tell me.”

Context decides whether English sounds better with “when,” “whenever,” or “while.” The Swahili form presents the time or circumstance in which the main event applies.

The short, tenseless relative form

Swahili can also use a compact relative form with the relative ending after the verb stem, especially in general, proverbial, or stylistically concise expressions:

• uendapo — “when/wherever you go”
• ufikapo — “when you arrive”

This pattern has no ordinary tense marker. It is useful in notices, instructions, formal prose, and set phrases, but learners should first become secure with transparent forms such as unapoenda and utakapofika. The exact English translation depends on context; Popote uendapo is naturally “wherever you go,” because popote contributes “wherever.”

Negative “when” clauses

For a negative condition—“when someone does not…” or often “if someone does not…”—Swahili commonly uses -si- followed by -po-:

Structure	Form	Meaning
a- + si- + po- + kuja	asipokuja	if/when he or she does not come
u- + si- + po- + elewa	usipoelewa	if/when you do not understand
wa- + si- + po- + pata	wasipopata	if/when they do not get

These forms often sit on the boundary between time and condition. Usipoelewa, uliza can be rendered “If you do not understand, ask” or “When you do not understand, ask.” English chooses according to what sounds natural; Swahili uses the same compact relative construction.

With object markers and other verb material

The relative marker remains before the verb stem, while an object marker (the short element showing who or what receives the action) comes closer to the stem:

• nitakapomwona = ni-taka-po-mw-ona — “when I see him/her”
• walipotuambia = wa-li-po-tu-ambia — “when they told us”
• unapokitumia = u-na-po-ki-tumia — “when you use it” (for a class 7 noun such as kifaa)

This ordering matters. Build the outer time frame first, then keep the object marker directly before the verb root.

With kuwa “to be”

Unlike the ordinary present copula ni, relative time forms use the verb kuwa:

• alipokuwa mtoto — “when he/she was a child”
• ninapokuwa nyumbani — “when I am at home”
• utakapokuwa tayari — “when you are ready”

Do not remove kuwa from these forms. It carries the verbal structure needed for the subject, tense, and relative marker.

Related -po-, -ko-, and -mo- location meanings

The three locative relatives form a semantic set:

Marker	Core spatial idea	Example	Meaning
-po-	a definite point/place; also time “when”	mahali tulipokutana	the place where we met
-ko-	general, directional, or indefinite location	mahali tunakokwenda	the place where we are going
-mo-	inside or within	chumba tulimoingia	the room that we entered / went into

The distinctions can be subtle in real usage, and a noun such as mahali or chumba helps make the intended location clear. For this topic, remember the practical division: use -po- for temporal “when”; learn -ko- and -mo- as related locative relatives, not alternative tense markers.

Examples in Context

Swahili	English	Note
Nilipofika, watu walikuwa wengi.	When I arrived, there were many people.	Past: ni-li-po-fika
Aliponiona, alitabasamu.	When she saw me, she smiled.	-ni- is the object marker “me”
Tulipomaliza kazi, tulirudi nyumbani.	When we finished the work, we went home.	Two completed past events
Unapohitaji msaada, niite.	Whenever you need help, call me.	A recurring or open situation
Ninapopika, watoto huweka meza.	When I cook, the children usually set the table.	Repeated routine
Atakapokuja, tutamwambia.	When he or she comes, we will tell him or her.	Future relative -taka-po-
Watakapofika uwanjani, mchezo utaanza.	When they reach the stadium, the match will begin.	Both events are future
Nitakapomwona Asha, nitampa ujumbe.	When I see Asha, I will give her the message.	Object marker -mw- in mwona
Usipoelewa swali, mwulize mwalimu.	If you do not understand the question, ask the teacher.	Negative relative; conditional in English
Wasipokuja leo, tutaanza bila wao.	If they do not come today, we will start without them.	wa-si-po-kuja
Alipokuwa mtoto, aliishi Mombasa.	When he was a child, he lived in Mombasa.	Relative form of kuwa
Utakapokuwa tayari, tujulishe.	When you are ready, let us know.	Future with kuwa
Popote uendapo, nakutakia heri.	Wherever you go, I wish you well.	Short relative form; popote supplies “wherever”
Hapa ndipo tulipokutana mara ya kwanza.	This is where we first met.	Locative -po-, not temporal “when”
Sikumbuki mahali walikokuwa wanaishi.	I do not remember where they were living.	General-location -ko-

Common Mistakes

Treating -lipo- as a single fixed ending

• Wrong analysis: nilipofika = ni- + -lipo- + fika
• Right analysis: nilipofika = ni- + -li- + -po- + fika
• Why: -li- is past tense and -po- is the relative marker. Seeing the parts lets you create anapofika and atakapofika correctly.

Using the ordinary future marker unchanged

• Wrong: Atapokuja, tutaanza.
• Right: Atakapokuja, tutaanza.
• Why: The standard affirmative future relative uses -taka- before -po-: a-taka-po-kuja.

Copying English future-clause tense

• Wrong: Anapofika kesho, tutaondoka. (when the intended meaning is one specific future arrival)
• Right: Atakapofika kesho, tutaondoka.
• Why: English says “when he arrives” with a present-looking verb, but Swahili normally marks the future relationship in this context.

Putting -po- outside the verb

• Wrong: Po nilifika, watu walikuwa wengi.
• Right: Nilipofika, watu walikuwa wengi.
• Why: In this construction, -po- is an infix—a meaningful piece inserted within the verb—not a separate conjunction placed before it.

Forgetting kuwa with “be”

• Wrong: Atakapo tayari, tutaanza.
• Right: Atakapokuwa tayari, tutaanza.
• Why: Relative time forms of “be” require the verb kuwa.

Using -ko- or -mo- as free substitutes for temporal -po-

• Wrong: Nilipofika → replace -po- with -ko- merely to mean another kind of “when.”
• Right: Keep -po- for “when”; use -ko- and -mo- when a location meaning calls for them.
• Why: The three markers are related, but their spatial meanings differ and only -po- has the regular temporal function taught here.

Usage Notes

A -po- clause may come before or after the main clause. When it comes first, a comma is helpful in writing: Nitakapofika, nitakupigia simu. Reversing the order is also natural: Nitakupigia simu nitakapofika. The choice is mainly about information flow—time frame first, or main message first.

English forces frequent choices among “when,” “whenever,” “while,” and sometimes “if.” Swahili does not divide the meanings in exactly the same way. Unapofanya mazoezi, unajisikia vizuri can mean “When you exercise…” or “Whenever you exercise…”. With a negative form such as usipofanya, English often prefers “if you do not…”. Translate the relationship, not each piece mechanically.

In conversation, speakers may also use conjunction-based expressions such as wakati “time/when” followed by a clause. The integrated relative form is nevertheless common, concise, and fully natural in both speech and writing. It is especially useful when the time relationship is tightly connected to the event.

The short ending forms such as ufikapo often sound more formal, concise, proverbial, or notice-like than unapofika. They are worth recognizing, but the finite tense forms are safer for everyday production when you need to make the time reference explicit.

Beyond the Basics / Advanced Use

The temporal use of -po- is best understood as an extension of the class 16 locative relative. A “time when something happened” is treated like a point at which the event is located. This connection explains why the same form can be temporal in siku tulipokutana (“the day when we met”) and spatial in mahali tulipokutana (“the place where we met”). The head word—siku “day” or mahali “place”—and the wider context resolve the meaning.

A relative form can directly modify a time expression:

• siku nilipoanza kazi — “the day when I started work”
• wakati tulipokuwa pamoja — “the time when we were together”
• kila anapokuja is less idiomatic than a full expression such as kila anapokuja hapa only where context supports it; for a clear “every time,” kila wakati anapokuja is transparent.

Forms with -napo- can shade from literal time into circumstance: Unapozingatia gharama, mpango huu ni bora means “When you consider the cost, this plan is better.” Here “when” effectively means “given the circumstance that you consider it.” This is common in explanation and argument, not only in narration.

The negative series deserves special attention because -si-po- often functions much like an English “unless/if not” clause. For example, Usipowahi, utakosa basi is naturally “If you are not on time, you will miss the bus.” Translating it as “when you are not on time” is possible in a habitual context but wrong for a single warning. Aspect, context, and the main clause determine the best English connector.

Finally, -po- also appears in demonstrative and emphatic locative words such as hapo, ndipo, and popote. These words can occur alongside a relative verb—Hapo ndipo tulipoanzia (“That is exactly where we started”)—but they do not replace the internal relative marker. Analyze each item separately rather than assuming every visible po has the same job.

Practice Tips

1. Build one verb across three times. Start with a common root such as fika: ninapofika, nilipofika, nitakapofika. Then repeat with ona, maliza, and hitaji.
2. Bracket the pieces you hear or read. Rewrite walipotuambia as wa-li-po-tu-ambia. This trains you to find the subject, tense, relative marker, object, and root instead of memorizing a long word as a block.
3. Translate in both directions with context. Take English pairs such as “when they arrive tomorrow” and “whenever they arrive early.” Choose watakapofika for the specific future event and wanapofika for the repeated situation, then place each in a complete sentence.

Related Concepts

• Prerequisite: Relative Clauses (-ye-/-o-/-cho- etc.) — introduces relative markers inside Swahili verbs and noun-class agreement.