Ili introduces an intended result: someone does one thing so that another situation may become true. The clearest productive pattern is ili + subject-marked subjunctive: Nilifika mapema ili nizungumze na meneja “I arrived early so that I could speak with the manager.” The subjunctive identifies the intended actor but does not assert that the purpose was achieved.
This differs from kwa + infinitive, which normally presents a means, manner, or cause: kwa kuandika “by writing.” English to and by can obscure that semantic boundary. Unless noted otherwise, ili purpose clauses are neutral in (informal) and (formal) Standard Swahili.
Six complete purpose forms
| Purpose form | Analytic build | Intended actor |
|---|---|---|
| ili nifike | ili + ni-fik-e | I |
| ili upate | ili + u-pat-e | you singular |
| ili awasaidie | ili + a-wa-saidi-e | he/she, helping them |
| ili tusiwacheleweshe | ili + tu-si-wa-chelew-esh-e | we, not delaying them |
| ili waingie | ili + wa-ingi-e | they |
| ili ifunguke | ili + i-funguk-e | class 9 subject |
| ili wajibu | ili + wa-jibu | they; final -u retained |
There is no ordinary -na-, -li-, -me- or -ta- inside these purpose verbs. Person or noun-class concord comes first, an object marker remains before the root, and regular -a changes to -e. Hyphens are analytic only.
Nimekuja mapema ili nizungumze na daktari kabla wagonjwa wengine hawajafika.
I have come early so that I can speak with the doctor before the other patients arrive.
Matrix perfect ni-me-ku-j-a presents the completed arrival. Purpose ni-zungumz-e shares the first-person referent but receives its own subject marker because ili introduces a clause.
Weka simu karibu ili usikose ujumbe wa dereva.
Keep the phone nearby so that you do not miss the driver's message.
Negative purpose u-si-kos-e makes the undesired outcome explicit. It does not use present negative hukosi or future negative hutakosa.
Andika namba ya chumba kwenye simu yako ili uikumbuke ukifika hotelini.
Write the room number on your phone so that you remember it when you reach the hotel.
In u-i-kumbuk-e, second-person subject u- is followed by class 9 object marker -i- for namba, then the root and subjunctive final -e. Ili selects the purpose clause but does not move the object marker out of its normal pre-root slot.
Same subject: repeat concord in the purpose clause
Even when the actor remains the same, the full ili construction can repeat subject concord.
Tulipunguza sauti ili tusiwaamshe watoto waliolala.
We lowered our voices so that we would not wake the sleeping children.
Past tu-li-punguz-a gives the actual action. Purpose tu-si-wa-amsh-e has the same “we” subject, negative -si-, plural-human object -wa-, causative base, and final -e.
Asha anaweka akiba kila mwezi ili anunue kompyuta mpya mwakani.
Asha saves money every month so that she can buy a new computer next year.
Present a-na-wek-a describes the saving practice. Subjunctive a-nunu-e is oriented toward next year's intended purchase; no future -ta- is required.
Tutakagua anwani tena ili tutume kifurushi mahali sahihi.
We will check the address again so that we send the parcel to the correct place.
Matrix future tu-ta-kagu-a locates the checking. Purpose tu-tum-e expresses its goal. English naturally says “so that we can send,” but Swahili needs no separate equivalent of “can” here.
The main action may succeed while the purpose fails. Alipiga simu ili amwambie habari, lakini hakupatikana means the calling occurred, but the intended telling did not. Purpose is not a result assertion.
Different subject: ili makes the switch explicit
One major advantage of a full purpose clause is that its subject can differ from that of the main clause.
Nilifungua dirisha ili watoto wapate hewa safi.
I opened the window so that the children could get fresh air.
First-person ni-li-fungu-a performs the opening; plural-human watoto controls wa-pat-e. A bare infinitive would normally invite same-subject control and obscure this switch.
Mwalimu aliandika maagizo ubaoni ili wanafunzi wajibu maswali kwa mpangilio.
The teacher wrote the instructions on the board so that the students would answer the questions in order.
Borrowed verb kujibu retains final -u: wa-jibu, not wajibe. The selecting conjunction and absence of indicative TAM identify the purpose form.
Fungua vali polepole ili maji yaingie kwenye tanki bila kumwagika.
Open the valve slowly so that the water enters the tank without spilling.
Class 6 maji controls ya-ingi-e. Human default a- would be a concord error.
Ili plus an infinitive in actual Standard usage
Same-subject ili + ku- infinitives also occur in current Standard Swahili: Alikwenda ofisini ili kuzungumza na meneja “She went to the office in order to speak with the manager.” This reduced pattern leaves the actor to control and context. The full ili azungumze makes person and mood explicit and is especially useful when teaching, contrasting participants, or avoiding ambiguity.
The infinitival reduction is not suitable when a different overt subject must be encoded. Use Nilifungua dirisha ili watoto wapate hewa, not ili watoto kupata hewa as the neutral full purpose clause.
Ili versus a bare infinitive and kwa + infinitive
A bare infinitive commonly expresses same-subject purpose after movement:
Tulikwenda sokoni kununua matunda ya mkutano.
We went to the market to buy fruit for the meeting.
The understood buyers are the travelers. Full ili tununue would make the purpose more explicit; both are possible in this context.
By contrast, kwa + infinitive normally answers “how?” or “by what means?”
Alitatua tatizo kwa kuwasha upya kipanga njia.
He solved the problem by restarting the router.
The restart is the means by which the problem was solved, not merely an intended later result. Compare:
Aliwasha upya kipanga njia ili intaneti ifanye kazi vizuri.
He restarted the router so that the internet would work properly.
Class 9 intaneti controls i-fany-e. If the intended meaning is explicitly “for the purpose of doing,” kwa ajili ya + infinitive is available; plain kwa kufanya should not be used as a universal replacement for English purpose “to.” See kwa plus an infinitive.
Purpose versus result
Ili encodes intention or design. A result connector such as kwa hiyo reports a consequence.
Rehema alifanya mazoezi kila asubuhi ili amalize mbio za kilomita kumi.
Rehema trained every morning so that she could finish the ten-kilometer race.
Rehema alifanya mazoezi kila asubuhi, kwa hiyo alimaliza mbio za kilomita kumi bila kusimama.
Rehema trained every morning, so she completed the ten-kilometer race without stopping.
Purpose a-maliz-e presents finishing as Rehema's goal and does not say whether she achieved it. Result a-li-maliz-a presents completion as an actual consequence. The underlying training and race are comparable, but connector and mood determine whether the second event is intended or realized.
Purpose versus an asserted cause
A cause clause explains an action from a fact already presented as true. A purpose clause instead looks forward to an outcome the actor seeks or seeks to prevent.
Juma alifunga mlango kwa sababu upepo ulikuwa ukiingiza vumbi ndani.
Juma closed the door because the wind was blowing dust inside.
Juma alifunga mlango ili upepo usiingize vumbi ndani.
Juma closed the door so that the wind would not blow dust inside.
In the first sentence, blowing dust is the asserted reason for closing the door. In the second, negative purpose u-si-ingiz-e presents keeping dust out as the intended effect; it does not assert whether the plan succeeded.
Position, punctuation, and register
A short integrated ili clause normally follows the main clause without a comma. Fronting is also possible, especially when a speaker or writer wants the purpose to frame the action:
Ili kila abiria asikie tangazo vizuri, mhudumu alisimama karibu na kipaza sauti.
So that every passenger could hear the announcement clearly, the attendant stood near the microphone.
The comma closes the fronted purpose frame before the main clause. Ili itself is neutral in (informal) and (formal) Standard Swahili; main-action-first order is common in relaxed conversation, while fronting is especially useful in planned instructions and (formal) explanation.
Common Mistakes
Keeping future -ta- after ili
❌ Tutapiga simu ili atatupokea kesho.
Incorrect for purpose — the intended action should be subjunctive, not a future assertion.
✅ Tutapiga simu ili atupokee kesho.
We will call so that she can receive us tomorrow.
Using an infinitive with a different overt subject
❌ Nilisimama kando ili basi kupita.
Incorrect as the neutral explicit-subject purpose clause — class 5 basi needs its own subject concord.
✅ Nilisimama kando ili basi lipite.
I stood aside so that the bus could pass.
Copying human concord onto an inanimate subject
❌ Washa hita ili maji apate joto.
Incorrect concord — plural-class maji takes ya-, not human a-.
✅ Washa hita ili maji yapate joto.
Turn on the heater so that the water warms up.
Using kwa + infinitive for an intended later result
❌ Niliweka alama kwa kukumbuka ukurasa.
Wrong for the intended purpose — kwa kukumbuka presents remembering as a means or circumstance.
✅ Niliweka alama ili nikumbuke ukurasa.
I made a mark so that I would remember the page.
Key Takeaways
- Ili + subjunctive introduces an intended result and overtly marks its subject.
- Regular purpose verbs lack ordinary indicative TAM and change final -a to -e; non-a verbs retain their final vowel.
- Same and different subjects are both possible because the purpose clause has its own concord.
- Same-subject ili + infinitive occurs, but the full subjunctive is clearer when participants contrast.
- A bare infinitive can express controlled purpose, while plain kwa + infinitive normally expresses means, manner, or cause.
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