Lexical Aspect - Categories

Categories

Zeno Vendler (1957) classified verbs into four categories: those that express "activity", "accomplishment", "achievement" and "state". Activities and accomplishments are distinguished from achievements and states in that the former allow the use of continuous and progressive aspects. Activities and accomplishments are distinguished from each other by boundedness: activities do not have a terminal point (a point before which the activity cannot be said to have taken place, and after which the activity cannot continue – for example "John drew a circle") whereas accomplishments do. Of achievements and states, achievements are instantaneous whereas states are durative. Achievements and accomplishments are distinguished from one another in that achievements take place immediately (such as in "recognize" or "find") whereas accomplishments approach an endpoint incrementally (as in "paint a picture" or "build a house").

In his discussion of lexical aspect, Bernard Comrie (1976) included the category semelfactive or punctual events such as "sneeze". His divisions of the categories are as follows: states, activities, and accomplishments are durative, while semelfactives and achievements are punctual. Of the durative verbs, states are unique as they involve no change, and activities are atelic (that is, have no "terminal point") whereas accomplishments are telic. Of the punctual verbs, semelfactives are atelic, and achievements are telic. The following table exemplifies examples of lexical aspect in English that involve change (an example of a State is 'know').

No Duration Has Duration
Telic Achievement Accomplishment
realise drown
Atelic Semelfactive Activity
knock walk

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