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<Paper uid="P85-1003">
  <Title>EIR.S E,R.S S,R.E S, RoE S~R.E S~RoE PAST PERFECT E~SoR SIMPLE PAST E.SoR PRESENT PERFECT EoS,R SIMPLE PRESENT E.S,R SIMPLE PRESENT SIEoR SIMPLE FUTURE SoE. R S, EmR S.E.R RoSoE Ro$.E R~E~S R~E,S</Title>
  <Section position="3" start_page="18" end_page="18" type="intro">
    <SectionTitle>
2. Tense
</SectionTitle>
    <Paragraph position="0"> We begin Dy hrst outhmng Hornstem's theory of tense. In sect=on 2.1. we describe the 13rtmtt,ves and constramnts on tense of h~s theory. In sectzons 2.2 and 2.3. we snow how the 0nmit=ves and constraints can be denved from computat=onal conszderat=ons.</Paragraph>
    <Section position="1" start_page="18" end_page="18" type="sub_section">
      <SectionTitle>
2.1 Revcs,ons to Hornstem's Theory of Tense
</SectionTitle>
      <Paragraph position="0"> Hornstem develops a theory of tense w#th#n the Re~cnenbachlan framewcrk whtch postulates three- theoretical entit~es: S (the moment of speech}, R (a relerence point}, and E (the moment of event). The key ~dea =s that certain linear orOenngs of the three t~me I:}o=nts get grammat=cahz.,~l mid the smx bas=c tenses oi Engl,sh. 1 The following ~s the last of basic tense strOctures:</Paragraph>
    </Section>
  </Section>
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