module Linguistics::EN::Conjugation
This file contains functions for conjugating verbs.
Version¶ ↑
$Id: conjugation.rb,v 08d2e43206b3 2015/03/12 20:32:17 ged $
Authors¶ ↑
-
Robert Berry <berrydigital@gmail.com>
-
Michael Granger <ged@FaerieMUD.org>
Copyright¶ ↑
Based on MorphAdorner (morphadorner.northwestern.edu/), which is licensed under the following terms:
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Public Instance Methods
Conjugate the receiving string as an infinitive with the specified
tense
and person
.
# File lib/linguistics/en/conjugation.rb, line 97 def conjugate( tense, person=nil ) self.log.debug "Conjugating %p in %s tense, %s person" % [ self.to_s, tense, person || "any" ] person ||= :* verb = self.to_s.downcase if result = get_irregular( verb, person, tense ) self.log.debug " verb %p is irregular: %p" % [ verb, result ] return result end self.log.debug " regular verb: conjugating by tense" return case tense when :present conjugate_present( verb, person ) when :present_participle conjugate_present_participle( verb ) when :past conjugate_past( verb ) when :past_participle conjugate_past_participle( verb ) else verb end end
Return the past participle of the word
# File lib/linguistics/en/conjugation.rb, line 77 def past_participle( person=nil ) return self.conjugate( :past_participle, person ) end
Return the past tense of the word
# File lib/linguistics/en/conjugation.rb, line 71 def past_tense( person=nil ) return self.conjugate( :past, person ) end
Return the present participle of the word
# File lib/linguistics/en/conjugation.rb, line 89 def present_participle( person=nil ) return self.conjugate( :present_participle, person ) end
Return the present tense of the word
# File lib/linguistics/en/conjugation.rb, line 83 def present_tense( person=nil ) return self.conjugate( :present, person ) end
Private Instance Methods
Conjugate the specified verb in the past tense; also used to conjugate the past participle.
# File lib/linguistics/en/conjugation.rb, line 167 def conjugate_past( verb ) case verb when /e$/ return verb + 'd' when /[^aeiou]y$/ return verb[ 0..-2 ] + 'ied' else if DOUBLING_VERBS.include?( verb ) verb = verb + verb[ -1 ] + 'ed' else return verb + 'ed' end end end
Conjugate the specified verb
in the present tense in the given
person
. The only person
that is
# File lib/linguistics/en/conjugation.rb, line 130 def conjugate_present( verb, person=:third_person_singular ) return verb unless person == :third_person_singular case verb when /(ch|s|sh|x|z)$/ return verb + 'es' when /(ay|ey|oy|uy)$/ return verb + 's' when /[^aeiou]y$/ return verb[ 0..-2 ] + 'ies' else return verb + 's' end end
Convugate the given verb
as a present participle.
# File lib/linguistics/en/conjugation.rb, line 147 def conjugate_present_participle( verb ) case verb when /[^aeiou]e$/ return verb[ 0..-2 ] + 'ing' when /ie$/ return verb[ 0..-3 ] + 'y' + 'ing' when /[aou]e$/ return verb[ 0..-2 ] + 'ing' else if DOUBLING_VERBS.include?( verb ) return verb + verb[ -1 ] + 'ing' else return verb + 'ing' end end end
If the given verb
is irregular in the given +person_ and
# File lib/linguistics/en/conjugation.rb, line 185 def get_irregular( verb, person, tense ) self.log.debug " looking for irregular verb: %p, %p person, %p tense" % [ verb, person, tense ] irregular = IRREGULAR_VERBS[ verb ] or return nil self.log.debug " %p is irregular: %p, selecting %p variant" % [ verb, irregular, person ] irrperson = irregular[ person ] || irregular[ :* ] or return nil self.log.debug " selected %p. Using %p tense: %p" % [ irrperson, tense, irrperson[tense] ] word = irrperson[ tense ] or return nil return word.sub( /\|.*/, '' ) end