Syntax: Structural Descriptions of Sentences


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Bog'liq
Syntax

Relations among Words

  • Types of relations between words
    • Arguments: subject, object, indirect object, prepositional object
    • Adjuncts: temporal, locative, causal, manner, …
    • Function Words
  • Subcategorization: List of arguments of a word (verb)
    • with features about realization (POS, perhaps case, verb form etc)
  • For English, the argument order: Subject-Object-IndirectObj
  • Example:
    • like: NP-NP (“John likes Mary”), NP-VP(to-inf) (John likes to watch movies)
    • think: NP-S (“John thought Mary was going to the party”)
    • put: NP-NP-PP
  • Adjuncts are optional (typically modifiers of an action)
    • John put the book on the table at 3pm yesterday
  • There are words with “demands” and words that fill the “demands”.
    • Demands are typed (NP, VP, PP, S)

English Syntax: A Sample

  • Sentence types:
    • Declarative (John closed the door)
    • Imperative (close the door!!)
    • Yes-No-Question (can you close the door?)
    • Wh-question (who closed the door? What did John close?)
  • Clause types:
    • Infinitival (to read a book)
    • Gerundive (reading of a book)
    • Relative Clause (that has a green cover)

English Syntax: A Sample – contd.

  • Noun Phrase:
    • Before the head noun:
      • Pre-determiner Determiner Post-determiner (Adjective|Noun) Noun
    • After the head noun (Modifiers)
      • Preposition phrases
      • Relative Clauses (the book that has only one sentence)
      • Gerundive (the flight arriving after 10pm)
  • Auxiliary Verbs
    • Modal (could, might, will, should…) < perfect (have) < progressive (be) < passive (be)
    • “might have been destroyed”
  • Large wide-coverage grammars have been developed/under development
    • XTAG (www.cis.upenn.edu/~xtag), HPSG, LFG

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