Most critical readings of Ali Smith’s Autumn frame the novel as a thematic reaction to the Brexit crisis. This consensus neglects the extent to which Smith manipulates grammar to dismantle temporal orientation. The present study applies Edmund Husserl’s phenomenology of passive synthesis, alongside the existential frameworks of Heidegger, Ricoeur, and Bergson, to explain how the text structurally generates a fractured temporal consciousness. Through a hermeneutic-phenomenological analysis of 30 specific scenes, the research evaluates the exact linguistic construction of time. The investigation isolates four syntactic mechanisms responsible for cognitive rupture: unmarked tense alternation, omitted dialogue punctuation, truncated anaphoric repetition, and subjectless passive constructions. The textual distribution of these features is highly asymmetrical; their frequency scales directly with the existential vulnerability of individual characters. Quotation marks, for instance, are absent in 83% of Daniel’s scenes, whereas the speech of minor figures remains conventionally punctuated. These grammatical operations bypass stylistic embellishment to physically impose the collapse of Husserlian retention and protention upon the reading experience. To theorize this phenomenon, the article proposes the concept of "dialogic polytemporality." The term defines a cognitive condition in which a compressed past, a suspended present, and an obstructed future operate concurrently and without hierarchical order inside a single fictional consciousness. The findings demonstrate how the syntax of the novel enacts political and temporal instability at the level of the sentence.