YodaSpeak translator in ruby with added pivot words

YodaSpeak.rb

# port of http://www.perlmonks.org/?node_id=162190
# 
# Please refactor this if necessary
# leonb -at- beriedata -dot- nl
# 
class String
  def yoda
    word = %w{is be will show do try are teach have look help see can learn has}.select { |word| self =~ /\b#{word}\b/ }[0]
    if word
      x = (self =~ /\b#{word}\b/) + word.size 
      "#{self[x+1,self.size].capitalize}, #{self[0,x].downcase}"
    else return self end
  end
end

puts 'I will teach you'.yoda
puts 'The truth is out there'.yoda
puts 'That is an Imperial shuttle'.yoda
puts 'My husband is giant dork'.yoda
puts 'These fish are tasty'.yoda