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24 lines
703 B
Plaintext
24 lines
703 B
Plaintext
--1 Tense, Polarity, and Anteriority
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-- This module defines the abstract parameters of tense, polarity, and
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-- anteriority, which are used in [Tensed Tensed.html] to generate different
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-- forms of sentences. Together they give 2 x 4 x 4 = 16 sentence forms.
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-- These tenses are defined for all languages in the library. More tenses
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-- can be defined in the language extensions, e.g. the "passé simple" of
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-- Romance languages.
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abstract Tense = {
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cat
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Pol ;
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Tense ;
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Ant ;
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fun
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PPos, PNeg : Pol ; -- I sleep/don't sleep
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TPres, TPast, TFut, TCond : Tense ; -- I sleep/slept/will sleep/would sleep
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ASimul, AAnter : Ant ; -- I sleep/have slept
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}
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