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Lexical choice of modal expressions

This paper describes a model of the choice of modal verbs and modal particles. The choice mechanism does not require a modality-specific input as, e.g., a modal logical formula. Instead semantic (modal force) and pragmatic constraints (speech act marking) are applied to the available information on the whole and constrain the set of modal candidates to those that are appropriate in the respective contexts. The choice model is realized in the CAN system that generates recommendations about courses of study.