451 Chapter 5: Syntax Making it stick together… Covering Sections 1-3…
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Transcript of 451 Chapter 5: Syntax Making it stick together… Covering Sections 1-3…
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451 Chapter 5: Syntax
Making it stick together…
Covering Sections 1-3…
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Why Syntax?
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Key Vocab
Grammatical (& ungrammatical) Transformational Grammar Universal Grammar
Lexicon Computational System Merge Move
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Get Some Exercise (ex. 1)
Grammatical or Ungrammatical?
The pilot landed the plane The plane landed
The journalist wrote the article The article wrote
The instructor told the students to read The instructor suggested the students to read
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Syntactic Categories Lexical - N, V, Adj, Adv Nonlexical - Articles, Prepositions,
etc
Identification Strategies Meaning Inflection Distribution
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Key Vocabulary
Constituent Groups and subgroups of words that
“go together”
Syntactic category Constituents that can be substituted for
one another with loss of grammaticality NP, PP, Art, Conj, S, VP, Adj, Pro…
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Get Some Exercise (ex. 2)
Identify the category of each word:
That glass broke suddenly
My paintings never seem quite right
Don’t forget to supplement coming to class with reading the textbook & doing the exercises
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Syntactic Category: NP
_________ was given a flag.
The son of Isabel and Sam Isabel’s son The boy Joe
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Identify NPs
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Syntactic Category: VP
Joe __________________.
Finish the sentence
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Constituency Tests
Substitution Pronoun Question Word
Relocation Conjunction …. but
Ambiguity≠ All for 1 & 1 for all
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Phrase Structure Rules
Define possible constituent groups What can a ____ look like…
NPVP
Etc.
Enable generalizations Describe constituent groups without
long lists of possible words…
Link to phrase structure trees
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Phrase Structure Rules: English NP N Joe NP Art + N the boy NP Art + Adj+ N the smart boy NP Art + Adj2 +N the big smart
boy NP Pro he
NP (Art) + (Adj)* + N
Pro{ }
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Phrase Structure Rules: Cont’d NP Art (Adj)* + N
*the boy smart (not Standard English) (can be predicted by the rule…)
Spanish: el muchacho inteligente (default style)
?el inteligente muchacho (¿special situations?)
You tell me… a NP ‘default’ rule for Spanish
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Write a rule for Korean (just 1 is OK)
The following data is from Korean.
a) Terry-ka ku yeca-lul coahanta.Terry-NOM that girl-ACC likes‘Terry likes that girl.’
b) I noin-i hakkyo ey kassta.this man-NOM school to went‘This man went to school.’
c) Sue-ka chinkwu eykey chayk-ul ilkessta.Sue-NOM friend to book-ACC read‘Sue read the book to a friend.’
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Key Vocabulary
Constituent structure treeAKA: Phrase-structure tree
Diagram of a phrase or sentence that reduces repetition by the use of syntactic category labels in the branches of a tree
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NP (Art) + (Adj) + Noun
NP
Art Adj N
The smart boy
Noun Phrase
Article Adjective Noun
The smart boy
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Get Some Exercise (ex. 3)
Treeing NPs & OtherPs The zoo Always try Very competent
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Using Trees: Ambiguity The son of Isabel and Sam
You tell me… Where is the ‘break’ for each meaning?
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Ambiguity Illustrated
NP
NP PP
Art N P NP
N Conj. N
the son of Isabel and Sam
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Ambiguity Illustrated: Cont’d
NP
NP Conj NP
NP PP NP
art N Prep N N
The son of Isabel and Sam
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Ambiguity Resolved
The trees disambiguate the meaning……of course, they do other stuff too…
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Verb Phrases & Sentences
More Rules & Trees…
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You tell me:
John found a ball. John found a ball in the grass. *John found. *John found in the grass.
A VP phrase-structure rule would be: VP Vt + NP (PP)
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Key Vocabulary: New
Subcategorization Restricts how lexical items can
occur
Examples: Transitive Verb: VP Vt + (adj)* NP
Find, love, destroy Intransitive Verb: VP Vi (adv)*
Die, sleep
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Key Vocabulary: Review
Phrase Structure Rules Specify grammatical ways of putting
sentences together Lexical insertion rules
Match syntactic categories with words or morphemes at the bottom of a tree
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Joe got a flagIP
NP VP
N I NP
+pst Vt Det N
Joe got a flag
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Diagram THIS! (ex. 4-5)
Start with “Play ball” (Beware the subject here…)
then try “You’re going down, Roberts”
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Get Some Exercise (ex. 6-7)
Are these constituents? Use Substitution & Movement tests… I’ve got [a date] with Paris Hilton When [does she] arrive?
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Key Vocabulary
Transformational rule an operation that moves, deletes, or
inserts a category a rule that applies to a syntactic tree
to yield a new syntactic tree.
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Transformations
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IP
NP VP
I V- pst
That seatistakenX
Transformations (Movement) Questions
Yes / No Wh-
Do Insertion
CP = Complement Phrase
Surface &UnderlyingStructures…
CP
C
Is
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Another Transformation?
What is the “underlying” sentence? What should the “tree” look like after transformation?
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Complement Clauses (ex. 9)
Key words (English) That Whether If …
This is the house that Jack built…
Sentence embedded in a sentence Universal
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Transformation Safari Find at least one TRANSFORMATION
from a naturally occurring source Y/N? WH-? DO insertion Relative Passive
Copy (or print screen) and bring to class
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Get Some Exercise (ex. 10-11)
Diagram the following sentences:
Who should the director call? Who should call the director?
HINT: Only one of the sentences has visible movement…
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Additional Notes (value of trees)
Structure Dependent Rules Surface words ≠ important Transformational rules constituents
Head NP agrees with Main VP Regardless of intervening structures Regardless of transformations
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Internalized Syntax allows us to: produce and understand an infinite set of utterances distinguish between grammatical and ungrammatical
strings interpret certain strings as well-formed grammatically
but ill-formed semantically interpret certain strings as well-formed semantically but
ill-formed grammatically understand the full meaning of a sentence from a string
of words, which may not contain all the words necessary for an accurate interpretation
perceive when two or more strings are synonymous (paraphrase)
perceive structural ambiguity in a grammatical string account for grammatical and logical relations within a
sentence
Just Do It: Provide examples for each of the above…
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Additional Structures(section 5…)
Coordination Pulls two parts together
Relatives Tells more about an NP
Passives Changes the focus De-emphasizes or obscures the
‘actor’
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Exercises
Recommended: 1-7, 9-11 You can skip 8 & 12-14 Explore the poetry on pages 198-
200…
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Tomorrow
Chapter 6: Semantics Understand trees, Focus on concepts