Chapter 109Tenselessness and the Time-Reference System

109.1 The absence of a tense category

Hokkaido Ainu has no grammatical tense. No alternation in verb form encodes whether an event precedes, coincides with, or follows the moment of speech. Nakagawa states the finding plainly: past, present, and future reference "cannot be expressed by any change of verb form, and normally need not be" Nakagawa (2024: 434). Bugaeva draws the same conclusion twice: "there are no pure tense markers" and the verb "may be marked for aspect, modality, and evidentiality" Bugaeva (2012: 491, 493). Takahashi adds that even aspect and evidentiality are not obligatory grammatical categories in Ainu Takahashi (2022); Yoshikawa reports that a clear perfective–imperfective opposition is absent both lexically and grammatically Yoshikawa (2022). A finite verb, unmarked for any of these, yields whatever temporal interpretation its event type and discourse context allow.

Nakagawa draws a typological parallel with Mandarin Chinese, which likewise recovers temporal reference from adverbs, aspect particles, and contextual position rather than from verb inflection Nakagawa (2024: 434). The grammatical categories the Hokkaido Ainu verb does engage — aspect, mood, modality, and evidentiality — form a periphrastic system of complex predicates whose architecture is mapped in Chapter 108 (Tense, Aspect, Mood, and Modality: Overview). The present chapter focuses on the theoretical status of the tense absence and the mechanisms through which temporal reference is achieved in its place.

109.2 The tenselessness debate and the status of a

Whether Ainu is best described as radically tenseless, as implicitly past, or as encoding a covert two-way tense opposition through the auxiliary a ‘perfective auxiliary’ was debated across most of the twentieth century and remains contested at one point. Four positions have been held.

Kindaichi's claim that Ainu "expresses everything in the past" rested on the observation that finite forms in oral narrative translate with past-tense equivalents. This describes a discourse default of the narrative register: events are ordered against a temporal frame set at the opening, so a bare verb reads as past by pragmatic inference, not by inflection. Chiri's refinement — that the past reading is obligatory only for predicates denoting change or action, while stative predicates prefer a present-progressive translation — anticipates the modern aspectual classification (treated in Chapter 110 (The Existential-Aspect System: kor an Progressive and wa an Resultative-Perfect)) but treats a discourse-aspectual tendency as a grammatical rule. Refsing's position is the sharpest departure: a language without the category of tense has no grammatical linear time ordering and so admits no preferred translation tense; calling the past "more proper" misapplies a European temporal grid to a system that lacks the category altogether Refsing (1986: §14.9.1) ‹contested›.

The auxiliary a ‘perfective auxiliary’ (plural rok ‘perfective auxiliary, plural’) is the form closest to a tense marker, and its analysis is genuinely unsettled Nakagawa (2024: 306–307). Kindaichi and Tamura read it as past, which would produce a covert two-way opposition: marked a = past, unmarked = non-past. Bugaeva and Satō treat it as an actional perfect — a past event with present relevance — which yields a past reading but is not a tense category Bugaeva (2012: 493); Satō (2006: 63). Nakagawa, following Yoshikawa's reanalysis, denies that a encodes tense or aspect at all, taking it to mark an event set in contrast to what follows rather than to locate that event in past time Nakagawa (2024: 306–307); Yoshikawa (2022) ‹contested›. The full debate is developed in Chapter 111 (The Perfective/Anterior Particle a (a, a…a, aan)); what this chapter records is that even the form most likely to encode tense is not analysed as a tense marker by the modern descriptive consensus.

109.3 Temporal adverbs and discourse anchoring

When explicit temporal location is required, the primary device is a free temporal adverb. numan ‘yesterday’ and nisatta ‘tomorrow’ are the basic past- and future-anchoring items; comparable expressions specify this morning, last year, and other reference points Nakagawa (2024: 434–435). The adverb occurs freely in clause-initial or preverbal position, and the bare verb it modifies requires no additional tense marking. Temporal information is distributed across the clause: the adverb locates the event, and the verb contributes its aspectual character.

In narrative, discourse position does the anchoring work that temporal adverbs do in speech. A story-world frame established at the opening locates subsequent bare verbs as past without any overt marker; transitions in scene or topic are often marked by the completive a, which places the preceding event in the background before the shift Nakagawa (2024: 306–307); Yoshikawa (2022). This relative, discourse-anchored time reference — where temporal interpretation tracks a reference point established in prior context rather than the absolute speech moment — is the dominant mode of temporal location in Hokkaido Ainu Nakagawa (2024: 436).

109.4 Aspect and completion forms as temporal anchors

Three of the four overt strategies for temporal location recruit grammatical forms whose primary value is aspectual, modal, or evidential; the temporal reading is an inference Nakagawa (2024: 434–436). The situational evidential siri anchors a visible, ongoing event in the present: a clause closed by siri ne profiles an event the speaker observes unfolding at the moment of speech Nakagawa (2024: 435); its own description belongs to Chapter 122 (siri ne — the Direct-Perception / Situational Evidential).

The progressive kor an ‘progressive’ and resultative wa an ‘resultative’ do not specify tense, but in narrative context they deliver recognizable temporal orientations. kor an presents an action as ongoing within the story frame and so reads as past from the perspective of the outside hearer; wa an presents the state left after a change and reads similarly. The example below illustrates both the progressive and the bare existential in a narrative setting where the past reading is entirely a function of discourse context.

The completion forms — a/rok, the recent perfect nisa ‘recent perfect’, and the pair verbs wa isam and wa okere — carry the strongest past-temporal implicature, because a completed event is canonically prior to the speech moment. Nakagawa notes the limit explicitly: these forms yield a temporal reading "only relative to the utterance moment" and "are not, in themselves, tense forms"; context can override the default past reading Nakagawa (2024: 436). A past English gloss for a bare verb or a kor an clause renders the discourse context, not a grammatical tense feature.

109.5 Prospective and future reference

Future reference draws on modal forms rather than a future tense. The prospective–intentive kusu ne ‘intend to; be scheduled to’ marks the speaker's intention or a scheduled event; oasi ‘surely will’ marks an event as certainly forthcoming; etokus ‘be about to’ indicates imminence; and etokoyki ‘be getting ready to’ marks incipient preparation Nakagawa (2024: 435); Satō (2008: 85–86). Each carries its modal value — intention, scheduled certainty, imminence — and the future temporal reading follows as pragmatic inference.

Ijäs's pedagogical grammar covers the same set under 'be going to, intend to, plan to', correctly grouping them as modal rather than tense, and observes that nankor with a future-oriented proposition yields a probability reading Ijäs (2023). The nisatta … nankor example above illustrates the modal–adverb combination that together delivers an unambiguous future reading without any future tense marker. The segmentation of kusu ne as the conjunction kusu plus the copula ne — rather than a single morpheme — is followed here in preference to the one-word pedagogical spelling kusune Nakagawa (2024: 435); Satō (2008: 85–86); Ijäs (2023).

109.6 Typological placement

Tenseless languages — in which tense is not a grammaticalized, obligatory category of the verb — are well attested cross-linguistically, and the universality of tense is not confirmed by the typological record. Bybee, Perkins, and Pagliuca, surveying tense, aspect, and modality across 76 languages, find that many languages mark temporal reference optionally or through aspect alone, encoding it in the same formal position as mood and evidentiality rather than through a dedicated tense paradigm (Bybee et al. 1994). Comrie's foundational account of aspect explicitly separates the aspectual category from tense precisely because many languages grammaticalize the former without the latter (Comrie 1976). Hokkaido Ainu falls in this class: its verb's grammatical categories are aspect, modality, and evidentiality, none of which is tense.

Within the typological space of tenseless systems, Ainu's aspect-prominent profile is characteristic: the verb's grammatical distinctions map onto aspectual, modal, and evidential values, and temporal reference is delegated to peripheral adverbs and contextual inference. The grammaticalization sources of the aspect forms — the existential an ‘exist’ feeding the progressive and resultative frames, the posture verb a ‘sit’ feeding the perfective auxiliary — are intransitive verbs that carry no tense meaning and acquire none through grammaticalization. The system as a whole confirms that the absence of tense is a primary fact about the language rather than a surface disguise for a covert category Nakagawa (2024: 306–308, 439–443); Yoshikawa (2022); (Bybee et al. 1994).