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In linguistics, diathesis alternation or verb alternation occurs when the same verb can be used in different subcategorization frames or with different valency, as in "Fred ate the pizza" (where ate is transitive, with object "the pizza") vs. "Fred ate" (where ate is intransitive, with no object). The two usages usually have a slight difference in meaning.
It is a hard problem for theoretical linguistics how to encode constraints on the diathesis alternation of a specific verb to a lexicon. It is also claimed that the manner in which verbs undergo diathesis alternation can be used to identify the semantic class they belong to e.g. in a machine learning task.
- Fred ate the pizza vs. Fred ate
- Mary broke the window vs. The window broke
- Mary presented the flowers to John vs. Mary presented John with the flowers
- Levin, B. (1993) English Verb Classes and Alternations: A Preliminary Investigation, University of Chicago Press, Chicago, IL
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