Past Tense (-li-) in Swahili

In Brief

Use subject prefix + -li- + verb for a completed past action: nilisoma means “I read” or “I studied.” In the negative, replace -li- with -ku- and use a negative subject prefix: sikusoma means “I did not read” or “I did not study.”

Overview

The -li- tense is the basic way to report an event as past: what you did yesterday, where someone went, what happened at work, or how a trip ended. It is introduced at A2 because it builds directly on the present-tense pattern with -na-. Compare ninasoma “I am reading” with nilisoma “I read/studied.” Only the tense marker changes.

A Swahili verb often works like a compact sentence. A subject prefix (the part that identifies who or what performs the action) is attached to a tense marker (the part that locates the action in time), followed by the verb stem. English normally uses separate pronouns and sometimes changes the verb itself: “I went,” “she came.” Swahili usually keeps the information together inside one word: nilienda, alikuja.

The simple beginner rule is that -li- presents an action or state as located and complete in the past. English translations vary with context: nilisoma can be “I read” or “I studied,” while tulifurahi can be “we were happy.” Later, you will distinguish this tense from the perfect -me- (“have done”) and compound forms such as nilikuwa ninasoma (“I was reading”).

How It Works

The affirmative pattern

The basic structure is:

subject prefix + -li- + (object prefix) + verb stem

An object prefix (the part showing who or what receives the action) is optional and appears only when needed. Start with the simpler pattern without one:

Swahili form	English	Parts
nilisoma	I read/studied	ni- + -li- + -soma
ulipika	you cooked	u- + -li- + -pika
alirudi	he/she returned	a- + -li- + -rudi
tulicheza	we played	tu- + -li- + -cheza
mlifanya	you all did/made	m- + -li- + -fanya
walifika	they arrived	wa- + -li- + -fika

With -soma “read/study,” the full personal pattern is easy to see:

Person	Subject prefix	Past form
I	ni-	nilisoma
you, singular	u-	ulisoma
he/she	a-	alisoma
we	tu-	tulisoma
you, plural	m-	mlisoma
they	wa-	walisoma

Independent pronouns such as mimi “I” and yeye “he/she” are normally unnecessary because the subject prefix already identifies the person. Use them for contrast or emphasis: Mimi nilipika; yeye aliosha vyombo “I cooked; he/she washed the dishes.”

The negative past

The negative does not simply add a word meaning “not.” It uses this pattern:

negative subject prefix + -ku- + (object prefix) + verb stem

Person	Negative prefix	Negative past of -soma
I	si-	sikusoma
you, singular	hu-	hukusoma
he/she	ha-	hakusoma
we	hatu-	hatukusoma
you, plural	ham-	hamkusoma
they	hawa-	hawakusoma

There are two key changes: -li- disappears, and -ku- marks the negative past. A regular verb keeps its final -a: hakufanya “he/she did not do,” not hakufanyi. The latter resembles a present-negative ending and is not the simple negative past.

Do not confuse this tense marker -ku- with the object prefix -ku- “you” or the infinitive prefix in kusoma “to read.” Their position and the surrounding prefixes reveal their job. For example, sikukupigia simu means “I did not call you”: si- (negative “I”) + -ku- (past negative) + -ku- (“you”) + -pigia simu (“call”).

Adding object prefixes

An object prefix comes immediately before the verb stem, after -li- or negative -ku-:

Swahili	English	Structure
Aliniona.	He/she saw me.	a-li-ni-ona
Nilikusaidia.	I helped you.	ni-li-ku-saidia
Tulimwona.	We saw him/her.	tu-li-mw-ona
Waliwaita.	They called them.	wa-li-wa-ita
Sikumwona.	I did not see him/her.	si-ku-mw-ona

Before a vowel-initial stem such as -ona, the third-person object marker appears as -mw-: alimwona. In careful standard spelling this is one word, as are all the other pieces of the verb.

Verbs that retain ku

Many common verbs are learned in the infinitive with ku-, but ordinary polysyllabic stems drop that infinitive prefix after a tense marker: kusoma → nilisoma. Some short verbs retain ku in tensed forms so that the verb remains recognizable and pronounceable:

Infinitive	Past	English
kula	nilikula	I ate
kunywa	alikunywa	he/she drank
kuja	tulikuja	we came
kufa	alikufa	he/she died

Forms such as nilikula contain ni-li-ku-la: here the retained ku belongs to the verb, not to the negative past. In sikula “I did not eat,” however, the identical sounds meet and are not doubled. Learn these high-frequency forms as complete patterns.

Kwenda “to go” commonly gives nilikwenda, alikwenda, and so on. Treat kwenda as a frequent form worth memorizing rather than trying to rebuild it from English “went.”

Subjects that are things, not people

The subject prefix agrees with the Swahili noun class (a grammatical group that controls matching prefixes), not merely with singular or plural. The past marker itself remains -li-:

Swahili	English	Agreement
Mtoto alilala.	The child slept.	class 1: a-
Watoto walilala.	The children slept.	class 2: wa-
Mti ulianguka.	The tree fell.	class 3: u-
Miti ilianguka.	The trees fell.	class 4: i-
Kitabu kilianguka.	The book fell.	class 7: ki-
Vitabu vilianguka.	The books fell.	class 8: vi-
Ndege ilifika.	The airplane arrived.	class 9: i-

Thus the sequence is still regular: ki-li-anguka, vi-li-anguka, i-li-fika. Knowing noun-class agreement lets you use the tense beyond sentences about “I,” “you,” and “they.”

Time words and questions

Time expressions often make the reference clear: jana “yesterday,” jana usiku “last night,” wiki iliyopita “last week,” and mwaka jana “last year.” They can occur near the beginning or end depending on emphasis: Jana tulikwenda sokoni and Tulikwenda sokoni jana both mean “Yesterday we went to the market.”

A yes/no question usually keeps the statement form and is recognized through context or intonation: Ulisoma jana? “Did you study yesterday?” Question words also fit into the normal sentence: Ulisoma nini? “What did you read?” and Walifika lini? “When did they arrive?” Swahili does not need a separate equivalent of English auxiliary “did.”

Examples in Context

Swahili	English	Note
Nilisoma kitabu jana.	I read a book yesterday.	Basic completed event
Alikwenda sokoni asubuhi.	He/she went to the market in the morning.	Common kwenda form
Tulifurahi sana.	We were very happy.	A past state
Jana walicheza mpira.	Yesterday they played football.	Time word first
Ulipika chakula gani?	What food did you cook?	Past question; no equivalent of “did”
Mkutano ulianza saa tatu.	The meeting began at nine o’clock.	Noun-class subject agreement
Nilimwandikia rafiki yangu.	I wrote to my friend.	Object prefix -mw-
Watoto walikunywa maziwa.	The children drank milk.	kunywa retains ku
Sikumwona.	I did not see him/her.	Negative plus object prefix
Hakufika kwa wakati.	He/she did not arrive on time.	Negative past
Hatukula nyumbani.	We did not eat at home.	Negative of kula
Mlisafiri kwa basi au kwa treni?	Did you all travel by bus or by train?	Plural “you”
Mvua ilinyesha usiku kucha.	It rained all night.	Class 9 agreement
Mimi nilipika, lakini Asha aliosha vyombo.	I cooked, but Asha washed the dishes.	Pronoun adds contrast

Common Mistakes

Keeping -li- in a negative sentence

• Wrong: Sikulisoma kitabu. (intended: “I did not read the book.”)
• Right: Sikusoma kitabu.
• Why: Simple negative past uses negative subject prefix + -ku-, not -li-. An object prefix may follow -ku-, but there is none in this sentence.

Using the present-negative final -i

• Wrong: Hakusomi jana.
• Right: Hakusoma jana.
• Why: The final -i belongs to the ordinary present negative, as in hasomi “he/she does not read.” Past negative keeps the stem ending: hakusoma “he/she did not read.”

Translating English “did” as a separate word

• Wrong: adding a separate verb before ulisoma to copy “Did you study?”
• Right: Ulisoma?
• Why: The prefix u- and marker -li- already create a complete past verb. Intonation or a question word makes it a question.

Separating the verb into pieces

• Wrong: ni li soma or si ku soma
• Right: nilisoma; sikusoma
• Why: Subject, tense, object prefix, and stem are written as one word.

Dropping retained ku from short verbs

• Wrong: Nilila chakula.
• Right: Nilikula chakula.
• Why: The common short verb kula retains ku after -li-. Memorize nilikula, alikunywa, and tulikuja as models.

Using the person prefix for a nonhuman subject

• Wrong: Kitabu alianguka.
• Right: Kitabu kilianguka.
• Why: A noun controls its own class agreement. Kitabu is class 7, so the subject prefix is ki-; a- is class 1, commonly used for a person.

Usage Notes

The -li- past often corresponds to English simple past: walifika jana “they arrived yesterday.” Unlike English, the Swahili verb does not change according to regular versus irregular English spellings. The same transparent marker appears in nilisoma, nilifanya, and nilikwenda. This makes formation predictable once the stem is known.

English simple past and past continuous do not always map one-to-one onto Swahili. In a suitable context, a simple -li- form may be translated naturally with “was,” but when the ongoing background matters, Swahili commonly uses a compound construction: nilikuwa ninasoma “I was reading.” For an A2 narrative, use -li- for the chain of completed events and learn the compound contrast later.

Also distinguish -li- from perfect -me-. Alifika jana reports that the arrival happened yesterday. Amefika usually presents the arrival as completed with current relevance: “he/she has arrived” or “he/she is now here.” A finished-time phrase such as jana naturally favors -li-.

In ordinary conversation, speakers often omit independent subject pronouns. Tuliongea already means “we talked.” Adding sisi sounds purposeful: Sisi tuliongea, wao walikaa kimya “We talked; they stayed quiet.”

Beyond the Basics / Advanced Use

You do not need to master these patterns at A2, but they explain forms you will soon meet in stories and more complex sentences.

Past relative forms

A relative clause (a part of a sentence that identifies a person or thing, like “who came”) can place a relative marker after -li-: mtu aliyekuja “the person who came,” kitabu nilichosoma “the book that I read.” In a-li-ye-kuja, -ye- refers back to the class 1 noun mtu. Other noun classes use different relative markers.

Background and completed event

Narratives frequently combine a compound background form with a simple event:

Nilikuwa ninasoma uliponipigia simu. — “I was reading when you called me.”

The ongoing reading provides the background; uliponipigia identifies the completed interruption. That second form also contains a time-relative element meaning roughly “when.” This is a later extension, not a change to the basic -li- rule.

Sequence and narrative style

A speaker can use several -li- verbs to report separate completed actions: Nilifika nyumbani, nilikula, halafu nililala “I arrived home, ate, and then slept.” At higher levels you will encounter the consecutive or narrative marker -ka-, which can make a sequence more tightly connected. The -li- tense remains the safest clear choice while you are learning to narrate past events.

Passive and other verb extensions

The past marker combines normally with extended verb stems. For example, Kitabu kiliandikwa mwaka jana means “The book was written last year.” The structure includes class 7 ki-, past -li-, and the passive stem -andikwa. Applied forms work similarly: Alimwandikia barua “He/she wrote him/her a letter.” Learning extensions expands what can follow -li- without changing where the tense marker goes.

Practice Tips

1. Transform one sentence three ways. Take a present form such as ninasoma, change it to nilisoma, then negate it as sikusoma. Repeat with all six personal subject prefixes.
2. Build a six-sentence yesterday diary. Use jana, asubuhi, mchana, jioni, and usiku. Include at least one question and one negative sentence, rather than writing only isolated conjugations.
3. Mark the pieces when reviewing. Mentally divide walimwona as wa-li-mw-ona and hatukuwaita as hatu-ku-wa-ita. Then write the normal joined form. This trains you to recognize subject, tense, object, and stem without treating them as separate words.

Related Concepts

• Prerequisite: Present Tense (-na-) — introduces the subject-prefix + tense-marker + verb pattern.
• Next step: Relative Clauses (-ye-/-o-/-cho- etc.) — uses past forms such as aliyekuja and nilichosoma.
• Next step: Temporal Clauses — connects past events with “when,” “before,” and “after.”
• Next step: Compound Tenses (Kuwa + Tense) — distinguishes completed events from ongoing past background.
• Next step: Passive Voice (-w-/-liw-/-ew-) — combines passive stems with past agreement, as in kiliandikwa.
• Later contrast: Consecutive/Narrative Tense (-ka-) — links actions in a narrative sequence.