Negative Subjunctive with kada | Hausa Grammar

Hausa uses kada + subjunctive when an event is rejected as something that should happen: Kada ya tafi “He should not go.” The same construction expresses prohibitions, negative wishes, reported negative instructions, and avoided results. It belongs to the broader subjunctive paradigm, not factual negation with ba, and it never takes a clause-final ba.

All unlabelled examples are (neutral Nigerian Standard Hausa). Full kada is neutral and especially clear in careful or (formal) writing. Contracted kar is extremely common (informal/conversational) and has the same core grammar. Ordinary boko spelling does not mark the tones of the subjunctive forms.

The kada + subjunctive pattern

Put kada before the agreeing subjunctive marker and lexical verb:

kada + subject marker + verb

Subject	With kada	Typical meaning
I	kada in tafi	let me not go
you, one man	kada ka tafi	do not go
you, one woman	kada ki tafi	do not go
he	kada ya tafi	he should not go
she	kada ta tafi	she should not go
we	kada mu tafi	let us not go
you, plural	kada ku tafi	do not go
they	kada su tafi	they should not go
impersonal	kada a tafi	no one should go

Ya kamata ya jira a nan.

He should wait here.

Kada ya jira a nan.

He should not wait here.

Mu yanke hukunci bayan mun ji kowa.

Let us decide after we have heard everyone.

Kada mu yanke hukunci kafin mu ji kowa.

Let us not decide before we have heard everyone.

The negative meaning comes from kada. The following in, ka, ki, ya, ta, mu, ku, su, a form the subjunctive paradigm and identify the subject. There is no second negative particle at the end.

💡

Build the construction once: kada + agreeing subjunctive + predicate. Do not begin with an ordinary ba ... ba negative and then insert kada.

Kar is shorter, not a different mood

Kar can replace kada without changing the person marker or proposition.

Kada ki manta da ranar ganawar.

Do not forget the appointment date. (to one woman; neutral)

Kar ki manta da ranar ganawar.

Don’t forget the appointment date. (to one woman; informal/conversational)

Kada ku yi hayaniya a ɗakin karatu.

Do not make noise in the library. (to a group; careful instruction)

In connected speech, the last consonant of kar may assimilate to a following consonant. Those are pronunciations of rapid speech, not a reason to change careful boko word division. Write kar ka, kar ki, kar mu, kar su.

A named subject keeps its agreement marker

When a noun names the subject, place it after kada/kar, then use the agreeing subjunctive marker:

kada + noun subject + agreement + verb

Kada Amina ta fita ita kaɗai da dare.

Amina should not go out alone at night.

Kada Musa ya kunna na’urar tukuna.

Musa should not switch on the machine yet.

Kada yaran su zauna kusa da rijiya.

The children should not sit near the well.

Amina ta, Musa ya, and yaran su show feminine singular, masculine singular, and plural agreement. English can put a name directly before should not; Hausa still needs the preverbal subject marker.

The impersonal marker a is useful for general safety rules (formal/institutional):

Kada a yi amfani da na’urar ba tare da izini ba.

The machine must not be used without permission. (formal notice)

The ba ... ba inside ba tare da izini ba belongs to the fixed expression “without permission.” It does not close the kada clause. This illustrates why learners must identify constructions rather than count occurrences of ba mechanically.

Prevention, wish, and avoided purpose

The negative subjunctive does not assert that an event failed to occur. It presents the event as unwanted, blocked, or to be avoided.

Kada iska mai ƙarfi ta lalata rufin gidan.

May the strong wind not damage the roof of the house.

Ta rufe taga domin kada ƙura ta shiga.

She closed the window so that dust would not enter.

Na rage sautin rediyo don kar jaririn ya farka.

I lowered the radio so that the baby would not wake up. (informal/conversational)

In the purpose examples, the unwanted event is not reported as a fact. It is the result that the main action aims to prevent. English may use so that ... not or lest (formal/literary), but Hausa keeps domin/don + kada/kar + subjunctive.

Placement determines which event is rejected

When one clause contains another, kada takes scope over the subjunctive clause immediately following it.

Amina ta ce kada Musa ya fita.

Amina said that Musa should not go out. (the going is rejected)

Kada Amina ta ce Musa ya fita.

Amina should not say that Musa went out. (the saying is rejected)

The words are similar, but moving kada changes the targeted event. In the first, Amina’s speaking is stated as fact and kada introduces her negative directive. In the second, kada precedes Amina ta ce, so the speech itself is what should not happen.

This scope contrast is also why a closing ba cannot be added as though it were harmless emphasis. Hausa marks the relevant negative mood at the left edge of its clause.

Negative subjunctive versus factual negatives

Compare three meanings with the same subject and verb:

Ba su fita jiya ba.

They did not go out yesterday. (completed fact denied)

Ba sa fita da dare.

They do not usually go out at night. (habit denied)

Kada su fita yau da dare.

They should not go out tonight. (future action discouraged)

The first uses a ba ... ba completive. The second uses the negative continuative and no closing ba. The third uses kada + subjunctive, also without a closing ba. English translates all three with some form of not, but their Hausa grammar is not interchangeable.

Dialogue correction

—Likita ya ce ba za ta sha maganin ba? —Ba haka ba. Ya ce kada ta sha maganin kafin ta ci abinci.

—Did the doctor say she will not take the medicine? —Not exactly. He said she should not take the medicine before eating.

Ba za ta sha ba reports a projected non-event. Kada ta sha reports advice or a prohibition. The correction chooses negative subjunctive because the doctor is directing the patient, not predicting her behavior.

💡

Use a meaning test: factual ba says an event is not true; kada/kar says the event is not wanted, permitted, or intended to happen.

Practice

Build a negative subjunctive with the indicated subject.

Kada in manta da makullin.

Let me not forget the key.

Kar ka taɓa wayar da hannunka a jike.

Don’t touch the wire with a wet hand. (to one man; informal/conversational)

Kada ma’aikatan su bar ofishin yanzu.

The employees should not leave the office now.

Kada a ajiye kaya a gaban ƙofa.

Goods must not be left in front of a door. (formal notice)

Common Mistakes

1. Adding a final ba

❌ Kada ku bar ofishin ba.

Incorrect — kada plus subjunctive does not use the ba ... ba frame.

✅ Kada ku bar ɗakin.

Do not leave the room. (to a group)

2. Omitting agreement after a noun

❌ Kada yaran yi wasa a nan.

Incorrect — plural yaran requires subjunctive su.

✅ Kada yaran su yi wasa a nan.

The children should not play here.

3. Adding future za because the event is later

❌ Kada za su tafi kasuwa gobe.

Incorrect — kada selects a subjunctive marker, not future za su.

✅ Kada su fita yau da dare.

They should not go out tonight.

4. Combining two negative openings

❌ Ba kada ya shiga ba.

Incorrect — this mixes factual ba negation with the negative subjunctive.

✅ Kada ya zo yau.

He should not come today.

5. Treating kar as a masculine marker

❌ Kar ka jira, Aisha.

Incorrect for Aisha — ka creates the gender error, not kar.

✅ Kar ki jira, Aisha.

Don’t wait, Aisha. (informal/conversational)

Key Takeaways

Negative subjunctive is kada/kar + agreeing subjunctive marker + predicate.
Kada is full and neutral; kar is especially common in informal conversation.
A named subject still needs agreement: kada Amina ta ..., kada yaran su ....
The construction expresses prevention, prohibition, negative wishes, and avoided purposes rather than simple factual denial.
The position of kada determines which embedded event is rejected.
Never add clause-final ba or future za to this pattern.

Now practice Hausa

Reading grammar gets you part of the way. The exercises are where it sticks — free, no signup needed.

Start learning Hausa →