The difference between Imperfective aspect and Semelfactive aspect

When used as nouns, imperfective aspect means a feature of the verb which denotes an action or condition that does not have a fixed temporal boundary, but is habitual, unfinished, continuous, repetitive or in progress, whereas semelfactive aspect means a subclass of perfective verbs that denotes a momentary or action (e.g., to sneeze, to blink).

check bellow for the other definitions of Imperfective aspect and Semelfactive aspect

  1. Imperfective aspect as a noun (grammar):

    A feature of the verb which denotes an action or condition that does not have a fixed temporal boundary, but is habitual, unfinished, continuous, repetitive or in progress.

  1. Semelfactive aspect as a noun (grammar):

    A subclass of perfective verbs that denotes a momentary or action (e.g., to sneeze, to blink).

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