Grade 0 is a later extension of the traditional grade description, created to classify common verbs that do not fit Grades 1–7 neatly—especially high-toned monosyllabic verbs and, in some analyses, a small all-high -a class. It is not a magic eighth paradigm and not a bin for every irregular form. The verbs grouped there share limited formal properties, while their object frames, verbal nouns, and derived extensions still have to be learned lexically.
All unlabelled examples are (neutral Nigerian Standard Hausa). Ordinary boko does not mark tone or vowel length. Technical tone descriptions use H for High, L for Low, and “long/short” only where analyses support the distinction.
Why grammarians introduced Grade 0
The classic Parsonian system numbered seven grades according to combinations of tone, final vowel, valency, and object-conditioned form. Several very frequent verbs remained outside its main patterns. A narrower modern use of Grade 0 covers high-toned monosyllables such as ci “eat,” bi “follow,” ji “hear/feel,” ja “pull,” and sha “drink.” Some descriptions extend the label to the small all-high disyllabic class biya “pay,” jira “wait for,” kira “call,” and riga “precede.”
| Residual class | Typical form | Object behavior | Why it is not an ordinary grade |
|---|---|---|---|
| High monosyllables | one syllable; final -i, -a, or -o; lexically short or long vowel | generally invariant in boko; a short vowel lengthens before a direct-object pronoun | no single final vowel or derivational meaning |
| All-high disyllabic -a class | H-H with long final -a | same main form across object environments | tiny lexical class |
| Other irregular verbs | gani, sani, bari, ba, zo, je, and others | verb-specific | not made regular merely by calling them Grade 0 |
There is real terminological variation across grammars and dictionaries. One source may call all exceptional verbs “irregular,” another may reserve Grade 0 for the monosyllables, and another may add the small H-H class. A careful analysis states which use it adopts instead of treating the numeral as a fact about every exceptional verb.
A small all-high class across four environments
The verbs biya, jira, kira, riga have all-high tone and long final -a in their principal finite environments. Ordinary boko therefore shows no alternation. Kira demonstrates the full frame:
Na kira, amma ba a ɗaga wayar ba.
I called, but nobody answered the phone. (no following object)
Na kira likita da sassafe.
I called a doctor very early. (noun direct object)
Na kira shi da sassafe.
I called him very early. (direct-object pronoun)
Na kira mata likita lokacin da ta suma.
I called a doctor for her when she fainted. (indirect object mata)
The written form kira stays constant, but syntax still distinguishes shi as direct object from mata as beneficiary. “Invariant” means that this verb does not display the Grade 2 -a/-i/-e alternation; it does not mean that objects are grammatically indistinguishable.
The class also has unusual verbal nouns. The verbal noun of kira has an H-L melody rather than the finite verb’s H-H melody, though both appear as kira in ordinary boko. Tone-aware dictionaries are essential here.
Tana kiran likita yanzu.
She is calling a doctor now. (verbal noun kira plus linker -n)
The -n in kiran likita is the masculine genitive linker attached to the verbal noun. It is not a noun-object ending on finite kira.
Other irregular verbs have their own paradigms
The high-frequency verbs gani “see,” sani “know,” and bari “leave/allow” show reductions before objects. Gani is gan before a direct-object pronoun and ga before a noun object; sani and bari lose final -i before an object.
Na gani daga nesa, amma ban gane ko wane ne ba.
I saw from a distance, but I could not make out who it was. (no following object)
Na gan ta a tashar mota.
I saw her at the bus station. (direct-object pronoun)
Na ga Hauwa a tashar mota.
I saw Hauwa at the bus station. (noun direct object)
Na san hanyar, amma ban san sunan unguwar ba.
I know the way, but I do not know the neighborhood’s name.
Ka bar su su kammala magana.
Let them finish speaking.
These verbs are not a single Grade 0 paradigm. Their behavior is lexical. A learner who knows only gani will produce the transfer error *na gani Hauwa, just as an English speaker might expect invariant see before both her and Hauwa.
Irregular bases can still form recognizable extensions
Being residual in the base system does not block derivation. A monosyllabic base may combine with an extension using phonological material that preserves a pronounceable stem. With Grade 6, a glide often appears between the base vowel and -o; with Grade 7, a similar adjustment can occur before -u.
| Basic verb | Derived form | Grade | Conventional contrast |
|---|---|---|---|
| bi “follow” | biyo | 6 | follow toward the deictic center / follow and come |
| bi “follow” | biyu | 7 | be followable, traversable, or well traveled |
| ja “pull” | jawo | 6 | pull/draw toward the relevant center; attract |
| ci “eat” | ciyar | 5 | feed, cause to eat |
| bari “leave” | baro | 6 | leave something behind and come away |
Yaron ya bi mahaifinsa zuwa kasuwa.
The boy followed his father to the market. (basic bi)
Yaron ya biyo mahaifinsa har gida.
The boy followed his father back home. (Grade 6 biyo toward the relevant center)
Wannan hanyar tana biyuwa ko da damina.
This route is passable even in the rainy season. (Grade 7 biyu)
Ta ciyar da yaran kafin su tafi makaranta.
She fed the children before they left for school. (established Grade 5 ciyar)
The extension gives a useful prediction, but lexical convention still rules. Jawo hankali “attract attention” is not merely physical pulling toward the speaker; ciyar has the ordinary lexical meaning “feed.” Do not assume that every Grade 0 root freely supplies all Grade 5–7 derivatives or that each derivative has only the most literal grade meaning.
Verbal nouns expose further irregularity
Nearly all monosyllabic verbs have a strong verbal noun formed by a long vowel with falling tone. Ordinary boko may leave that distinction invisible. The small kira class changes tone, while gani, sani, bari have verbal nouns identical in spelling to their citation forms. Zo “come” and je “go” exceptionally share zuwa; highly irregular ba “give” has bayarwa.
| Finite verb | Verbal noun in ordinary boko | Learning issue |
|---|---|---|
| ci | ci | tone and vowel length distinguish the strong verbal noun in speech |
| kira | kira | finite H-H versus verbal-noun H-L |
| gani / sani / bari | gani / sani / bari | same spelling; construction identifies function |
| zo / je | zuwa | suppletive shared verbal noun |
| ba | bayarwa | irregular verb with a -wa verbal noun |
Suna zuwa ofis da wuri a kowace Litinin.
They come to the office early every Monday.
Tana bayar wa ɗalibai shawara bayan darasi.
She gives the students advice after class.
With ba, remember the separate finite recipient exception: ta ba shi littafi, not *ta ba masa littafi. The verbal-noun spelling bayarwa does not regularize the finite recipient frame.
Final vowels are not selected by tense
Grade 0 and irregular alternations respond to lexical class, object environment, or derivation—not English tense. Compare finite kira after different TAM markers:
Ta kira shi jiya.
She called him yesterday.
Za ta kira shi gobe.
She will call him tomorrow.
The finite verb remains kira. In the continuative, however, tana kiransa uses the verbal noun and an attached possessive/object expression. That is a constructional change, not a “present-tense ending.”
A practical dictionary method
For any residual verb, record five pieces of information:
- its tone and vowel length in a marked technical source;
- its no-object, noun-object, and pronoun-object forms;
- its form before an indirect object, if attested;
- its verbal noun;
- each established derived form with meaning and complement frame.
This method is slower than assigning a number from spelling, but it prevents invented paradigms. It also accommodates disagreements between analytical traditions without obscuring the actual Hausa facts.
Common Mistakes
1. Treating Grade 0 as one fully regular paradigm.
❌ Duk fi’ilan Grade 0 suna da ƙarewa da ma’ana iri ɗaya.
Incorrect claim—Grade 0 is a residual class, not one ending with one meaning.
✅ Ci da kira duka na musamman ne, amma tsarin kalmominsu bai zama iri ɗaya ba.
Ci and kira are both exceptional, but their word patterns are not identical.
2. Keeping gani invariant before a noun object.
❌ Na gani Hauwa a tashar mota.
Incorrect standard finite form before a noun object.
✅ Na ga Hauwa kusa da tashar mota.
I saw Hauwa near the bus station.
3. Inventing a Grade 2 alternation for the kira class.
❌ Na kire shi da safe.
Incorrect—kira does not take a Grade 2 -e form before a pronoun.
✅ Na kira shi da safe.
I called him in the morning.
4. Treating a derived vowel as a tense suffix.
❌ Biyo is the future form of bi.
Incorrect claim—biyo is a Grade 6 derivative, not a future tense.
✅ Yaron ya biyo ni har gida.
The boy followed me home. (derived Grade 6 meaning)
Key Takeaways
- Grade 0 is a residual analytical category, especially for high-toned monosyllables; descriptions differ on its exact scope.
- The small all-high class biya, jira, kira, riga is invariant across its main finite object environments.
- Other irregulars such as gani, sani, bari, ba, zo, je retain their own paradigms and verbal nouns.
- Derived forms such as biyo, biyu, jawo, ciyar, baro are morphologically related but lexically conventional.
- A grade label never replaces learning the attested object frames, tones, vowel lengths, verbal noun, and meanings of the individual verb.
Related Topics
- What a Hausa Verb Grade Is—and Is NotA2 — Understand Hausa verb grades as lexical morphophonological patterns shaped by meaning, valency, and the following object environment—not as tense conjugations.
- Lexical Exceptions to Grade PredictionsA2 — Use Hausa verb grades as strong structural guides without forcing common irregular verbs, exceptional frames, or lexicalized meanings into false regularity.
- The Three Object EnvironmentsA2 — Choose Hausa verb forms by whether no object, a noun direct object, or a direct-object pronoun immediately follows, while treating indirect objects separately.
- Monosyllabic VerbsC1 — Master the small high-frequency class of one-syllable Hausa verbs without inventing object alternations, verbal nouns, or derived-grade paradigms.
- Limits of the Traditional Grade SystemC1 — Use Hausa grade labels as powerful descriptions without mistaking them for complete, exceptionless verb paradigms.
- Grade Analysis in DictionariesC1 — Decode Hausa dictionary verb entries by separating the headword, grade label, tone, object-conditioned forms, verbal noun, and lexical frames.