Tense.html

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<i> Produced by 
gfdoc - a rudimentary GF document generator.
(c) Aarne Ranta (aarne@cs.chalmers.se) 2002 under GNU GPL.
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<h1> Common: Structures with Common Implementations.</h1>

This module defines the abstract parameters of tense, polarity, and
anteriority, which are used in [``Phrase`` Phrase.html] to generate different
forms of sentences. Together they give 4 x 2 x 2 = 16 sentence forms.
These tenses are defined for all languages in the library. More tenses
can be defined in the language extensions, e.g. the <i>passe simple</i> of
Romance languages in [``ExtraRomance`` ../romance/ExtraRomance.gf].
<pre>
  abstract Tense = Common ** {
  
    fun
      TTAnt : Tense -> Ant -> Temp ;
  
      PPos, PNeg : Pol ;           -- I sleep/don't sleep
  
      TPres  : Tense ;                
      ASimul : Ant ;
      TPast, TFut, TCond : Tense ; -- I slept/will sleep/would sleep --# notpresent
      AAnter : Ant ;               -- I have slept                   --# notpresent
  }
</pre>

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