Swahili can suppress or background an agent in several ways. A morphological passive promotes the affected object and adds a passive extension to the stem: Kamati iliidhinisha mpango “The committee approved the plan” becomes Mpango uliidhinishwa “The plan was approved.” A subjectless human-plural active can mean generic “people/they,” while class 15 and locative class 17 can organize the clause around an action or general setting instead of a named actor.
These are not interchangeable translations of English passive be + participle. Each construction chooses a different grammatical controller and a different discourse center. The passive foregrounds an affected participant; generic human agreement leaves an unspecified human actor conceptually active; class 15 makes an activity the subject; class 17 makes a spatial or impersonal domain control the verb.
Morphological passive and promotion
Swahili passive morphology is built into the lexical verb, typically with -w-, -iw-, or -ew-. The former object becomes the grammatical subject and supplies subject concord.
| Active | Passive | Controller change |
|---|---|---|
| Mhariri aliandika barua. | Barua iliandikwa. | class 1 mhariri → class 9 barua |
| Kamati ilikubali ombi. | Ombi lilikubaliwa. | class 9 kamati → class 5 ombi |
| Wafanyakazi walifungua milango. | Milango ilifunguliwa. | class 2 wafanyakazi → class 4 milango |
Ombi lako limekubaliwa baada ya nyaraka zote kukaguliwa.
Your application has been accepted after all the documents were checked.
Milango ya ukumbi itafunguliwa saa mbili na nusu asubuhi.
The hall doors will be opened at eight thirty in the morning.
In li-me-kubal-iw-a, class 5 ombi controls li-, perfect -me- remains in its slot, and -iw- forms the passive. English uses a separate auxiliary “has been”; Swahili expresses voice inside one finite complex. See passive formation for allomorphy.
Optional agent with na
A passive can omit the agent or add na + noun phrase when the doer still matters.
Daraja hilo lilibuniwa na mhandisi kutoka Mbeya.
That bridge was designed by an engineer from Mbeya.
Class 5 daraja hilo controls li-li-buni-w-a. The human after na is not the subject and has no effect on li-.
Simu yangu iliibiwa kwenye basi jana jioni.
My phone was stolen on the bus yesterday evening.
The thief is unknown or irrelevant, so an agentless passive is complete. In (formal) notices and reports, omission may also background an institution whose identity is obvious. If responsibility is the point, an active sentence is usually clearer:
Bodi ilikataa pendekezo kwa sababu halikuwa na makadirio ya gharama.
The board rejected the proposal because it had no cost estimate.
Passive Pendekezo lilikataliwa na bodi is grammatical, but it chooses the proposal as topic. Active voice makes the responsible board immediate. Agent suppression is a pragmatic choice and can carry ethical consequences in public writing.
Generic human plural: active grammar, indefinite actor
Third-person plural human agreement without an overt subject often means “people,” “they,” or an institutionally understood group. The clause remains morphologically active.
Wanasema kutakuwa na mvua nyingi mwaka huu.
People say there will be a lot of rain this year.
Wamefungua barabara ya pwani baada ya matengenezo.
They have reopened the coastal road after repairs.
Waliniambia nirudi kesho kuchukua cheti.
They told me to return tomorrow to collect the certificate.
The subject marker wa- still denotes human plural. Context may leave the people generic, unknown, or recoverable as “the officials.” English often translates these with a passive—“it is said,” “the road has been reopened”—but Swahili has not promoted the object.
Do not add free wao unless a specific group is contrastive. Wao wamefungua barabara means “they, as opposed to someone else, have opened the road,” not generic institutional action.
Class 15: the activity as grammatical subject
An infinitive in ku- can function as a class 15 noun naming an activity. That action controls class 15 concord and allows an agentless regulation to be framed around the prohibited or permitted behavior.
Kuingia bila kitambulisho hakuruhusiwi katika eneo hili.
Entering without identification is not permitted in this area.
The subject is class 15 kuingia bila kitambulisho. Negative passive ha-ku-ruhusi-w-i is written hakuruhusiwi. It does not agree with an unspoken official.
Kupiga picha kunaruhusiwa baada ya kupata kibali cha msimamizi.
Taking photographs is permitted after obtaining the supervisor's authorization.
Positive class 15 ku- controls ku-na-ruhusi-w-a. This style is common on (formal) signs, rules, and institutional instructions. It presents the action as a policy category rather than addressing a particular person.
Class 17: general domain and impersonal presentation
Locative class 17 ku- can control a clause whose relevant domain is general, spatial, or presentational.
Kwenye jengo hili hakuruhusiwi kuvuta sigara.
Smoking is not permitted in this building.
The initial kwenye phrase establishes a class 17 domain, and negative ha-ku-ruhusi-w-i presents the prohibition there. Compare class 15 subject order Kuvuta sigara hakuruhusiwi kwenye jengo hili: the surface verb is identical, but the first construction begins with the place as frame while the second names the activity as subject. Context and structure distinguish the homophonous class markers.
Class 17 also appears in reportive and evidential-looking impersonals:
Kunasemekana kuwa bei ya mafuta itapanda mwezi ujao.
It is said that the price of fuel will rise next month.
Kunaonekana kuwa mfumo mpya umepunguza muda wa kusubiri.
It appears that the new system has reduced waiting time.
These forms suppress a specific experiencer or speaker source. They are common in (formal) reporting and cautious exposition. Active Wachambuzi wanasema... is better when the analysts are known and evidential responsibility matters.
Active, passive topic, and impersonal presentation
Imagine reporting the announcement of examination results.
Neutral active event:
Kamati ilitangaza matokeo mapya kwenye mkutano jana.
The committee announced the new results at the meeting yesterday.
The agent kamati is topic and class 9 i- controls ilitangaza.
Affected participant as topic:
Matokeo mapya yalitangazwa na kamati kwenye mkutano jana.
The new results were announced by the committee at the meeting yesterday.
Class 6 matokeo mapya has been promoted and controls ya-li-tangaz-w-a. The na-agent remains available but backgrounded.
Meeting as frame, results as presentational focus:
Kwenye mkutano kulitangazwa matokeo mapya jana.
At the meeting, new results were announced yesterday.
Class 17 ku- controls passive ku-li-tangaz-w-a and the results appear postverbally as new information. This is locative presentational syntax, not simply the patient passive with its words reversed. Morphology makes all three readings visible.
Recipient passives and other promoted objects
With a double-object verb, a human recipient or beneficiary is commonly the participant promoted.
Wanafunzi walipewa vitabu vipya kabla ya muhula kuanza.
The students were given new books before the term began.
Class 2 wanafunzi controls wa-li-p-ew-a; theme vitabu vipya remains after the verb. To foreground the books instead, recast the recipient with kwa:
Vitabu vipya vilitolewa kwa wanafunzi siku ya kwanza.
New books were issued to the students on the first day.
The theme now controls class 8 vi-li-tole-w-a. Swahili does not freely promote either of two objects without reorganizing their syntax. See object promotion.
Passive is not stative
A passive presents an event affecting a participant; a stative extension presents a resulting condition or potential.
Dirisha limefunguliwa na mlinzi.
The window has been opened by the guard.
Dirisha limefunguka kwa sababu bawaba imelegea.
The window has opened because the hinge has become loose.
Passive funguliwa licenses an agent; intransitive/resultative funguka does not present a hidden opener in the same way. English “the window is open” may describe a state rather than either event, so translation must identify the intended viewpoint.
Register
Agentless passives are neutral in conversation and especially frequent in (formal) regulations, procedures, and news. Generic wa- is very common in (informal) reports and institutional interactions. Class 15 action subjects are characteristic of signs and rules (formal). Kunasemekana/kunaonekana is neutral to (formal) and can create cautious distance. None of these choices is automatically more objective; each assigns or suppresses responsibility differently.
Common Mistakes
Building an English be + participle sequence
❌ Barua ilikuwa andikwa jana.
Incorrect—Swahili passive voice is formed inside the lexical verb.
✅ Barua iliandikwa jana na katibu wa kamati.
The letter was written yesterday by the committee secretary.
Keeping the active agent's agreement
❌ Maombi amekubaliwa na kamati.
Incorrect—plural class 6 maombi must control the passive verb.
✅ Maombi yamekubaliwa na kamati baada ya mapitio.
The applications have been accepted by the committee after review.
Introducing the passive agent with kwa
❌ Makadirio yalikaguliwa kwa mchumi wa wilaya.
Incorrect for ‘by the district economist’—ordinary passive agents take na.
✅ Makadirio yalikaguliwa na mchumi wa wilaya kabla ya kikao.
The estimates were checked by the district economist before the meeting.
Adding a contrastive pronoun to a generic human clause
❌ Wao wanasema ofisi itafungwa, ikiwa wasemaji hawajatambuliwa.
Misleading for generic ‘people say’—wao selects a particular contrasting group.
✅ Wanasema ofisi itafungwa mapema leo.
They say the office will close early today.
Negating a passive with an affirmative ending
❌ Kuingia hapa hakuruhusiwa kila siku.
Incorrect for a present general prohibition—the negative present ends in -i.
✅ Kuingia hapa hakuruhusiwi bila kibali.
Entering here is not permitted without authorization.
Key Takeaways
- A morphological passive promotes an affected participant and makes it control subject agreement.
- Na + agent is optional; active voice is clearer when responsibility is central.
- Subjectless human plural wa- gives generic or institutionally understood human agency but remains active.
- Class 15 can make an activity the subject; class 17 can make a general domain or impersonal frame control the clause.
- Passive, generic, and impersonal alternatives package the same event differently rather than serving as mechanical synonyms.
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Start learning Swahili →Related Topics
- Locative Subjects and InversionC1 — Build place-first presentational clauses in which a locative controls verbal concord and a newly presented participant follows the verb.
- Comparative Clause SyntaxB2 — Build comparisons with kuliko, zaidi ya, and kama while preserving predicate agreement, controlling ellipsis, and resolving the scope of abbreviated standards.
- Forming the PassiveB1 — Form Standard Swahili passives with -w-, -iw-, and -ew- while preserving TAM and making the promoted participant control subject agreement.
- Passive Agents with naB1 — Add an optional passive agent with na, distinguish that agent from an instrument, and choose active voice when responsibility must be unmistakable.
- Object Promotion in the PassiveB2 — Track how a theme, recipient, or applied object becomes the passive subject and takes over subject concord from the omitted agent.