Grammatical relations, agreement, and genetic stability
- Languages vary in whether or not primary grammatical relations (PGRs) are sensitive to information from clause-level case or phrase structures. This variation correlates with a difference between verb agreement systems based on feature unification and systems based on feature composition. The choice between different PGR and agreement principles is found to be highly stable genetically and to characterize Indo-European as systematically different from Sino-Tibetan. Although the choice is partially similar to the Configurationality Parameter, it is shown that Indo-European languages of South Asia are nonconfigurational due to areal pressure but follow their European relatives in PGR and agreement principles.
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