Affirmative Subject Concord: Complete Table

An ordinary affirmative finite verb in Standard Swahili begins with a marker that identifies its grammatical subject. With “I,” “you,” “we” and other personal subjects, it marks person and number. With a noun subject, it normally agrees with the noun's class. English often leaves the verb unchanged, but Swahili contrasts mti unaanguka “the tree is falling” with miti inaanguka “the trees are falling.”

This page gives the complete core affirmative inventory. It does not decide which class a new noun belongs to, and it does not build every tense. All unlabelled forms are neutral in (informal) speech and (formal) standard writing. The markers are shown with analytic hyphens because they are bound morphemes; finished finite verbs are written solid.

The personal subject markers

The basic affirmative order is subject marker + tense/aspect/mood + object marker if present + root + extensions + final vowel. Thus tu-na-som-a becomes tunasoma. The independent pronoun is usually unnecessary because tu- already says “we.” A pronoun remains possible for contrast: Sisi tunalipa leo “As for us, we are paying today.”

The m- in mnataka is not an independent word and is not a noun prefix. It is second-person plural subject concord occupying the verb's first slot.

Subject markers by noun class

The table lists the traditional class number, a sample controller and its affirmative marker. Classes 11 and 14 share u- in the singular, and classes 15 and 17 share ku-; the controller and context distinguish them.

The class 18 existential/copular sequence is conventionally written as two words in mna joto “it is hot in here”: mna is the locative form built on “have,” not a lexical finite verb followed by a split-off tense marker. Ordinary lexical finite verbs remain solid, as in mmejaa watu “inside here has filled with people.” Locative agreement choices depend on whether the place is specific, general or interior; the table identifies the marker rather than replacing the dedicated locative analysis.

Same-looking markers, different controllers

Several forms repeat across the system. Their position tells you that they are subject markers; the controller tells you their grammatical value.

• u- can mean “you (singular),” class 3, class 11 or class 14: unasoma, mti unaanguka, uzi unakatika, uzuri unavutia.
• a- marks third-person singular or class 1 agreement. Those converge because an ordinary singular human noun controls class 1.
• wa- marks third-person plural and class 2 agreement, the corresponding plural human convergence.
• i- belongs to class 4 or class 9: miti inaanguka but barua inafika.
• ku- belongs to nominalized infinitive class 15 or general locative class 17.
• m- can mark second-person plural or an interior class 18 location: mnasoma “you all are reading” versus chumbani mna watu “there are people inside the room.”

The first u- is second-person singular; the second is class 3. Surface spelling alone cannot tell you which grammatical feature it realizes. The overt subject or discourse supplies that information.

Both verbs begin i-, yet miti is class 4 plural and barua is class 9 singular. Agreement is a controller–target relation, not a unique translation attached to each prefix.

The marker stays first while TAM changes

Once the subject marker has been selected, different tense or aspect material follows it. Compare class 7 ki-:

Affirmative subject concord remains at the left edge in these core forms. Negation replaces it with a negative series rather than merely inserting English “not”; see the negative subject table.

Three controllers, three complete chains

Subject concord is easiest to check as part of the noun's wider agreement family. These parallel sentences each contain a demonstrative, adjective, possessive and perfect verb.

The subject markers are respectively class 1 a-, class 3 u- and class 7 ki-. The nearby adjective mdogo happens to be identical in the first two sentences, but huyu/huu and a-/u- keep the chains distinct. Do not select a verb marker by copying m- from mtoto or mti, and do not select it from the nearest modifier.

Overt nouns and omitted subjects

A subject noun can be stated, as in gari limefika. Once established, it can be omitted because the marker continues to track its class.

The second clause omits gari, but negative class 5 hali- in halijakaguliwa retrieves it. Personal subjects behave similarly: Nimefika already identifies the speaker as “I.” Repeating mimi in every clause is unnatural unless emphasis or contrast is intended.

Subject concord can also reveal number when the noun does not. Barua imefika has one class 9 letter; barua zimefika has class 10 letters. English number is visible on letter/letters, while Swahili may place the decisive difference inside the verb.

Common Mistakes

Copying the noun prefix onto the verb

Treating second-person plural m- as a separate word

Using class 9 i- for every unchanged noun

Repairing the verb without repairing the whole chain

Every dependent changes: hii → hiki, nzuri → kizuri, yangu → changu, and i- → ki-. Debugging from kitabu outward prevents the common English-speaker habit of matching one item by sound and leaving the rest inconsistent.

Key Takeaways

The core personal subject markers are ni-, u-, a-, tu-, m-, wa-; noun subjects select the class marker in the complete table. The marker precedes tense, aspect or mood material and is written together with the finished finite verb. Repeated forms such as u-, i- and ku- are disambiguated by their controller. Find that controller first, then check the whole concord chain rather than guessing from the noun's opening sound.