Target Audience: Undergraduate (UG) & Postgraduate (PG) University Students
SECTION 1: SYNTAX
4.1. What is Syntax?
Syntax is the subfield of linguistics that studies the rules, principles, and processes governing sentence structure. While morphology examines the internal architecture of words, syntax investigates how those words are combined, ordered, and arranged hierarchically to form grammatical phrases and sentences.
4.2. The Constituents of a Sentence
A constituent is a structural unit—a word or a group of words—that functions as a single, coherent component within a larger hierarchical sentence layout. Sentences are not flat strings of words; they are built out of hierarchical chunks.
┌───────────────────────────┐
│ SENTENCE CONSTITUENTS │
└─────────────┬─────────────┘
│
┌────────────────────────┴────────────────────────┐
▼ ▼
┌────────────────────┐ ┌────────────────────┐
│ PHRASAL LEVEL │ │ CLAUSAL LEVEL │
├────────────────────┤ ├────────────────────┤
│ NP, VP, PP, AP │ │ Matrix, Coordinate,│
│ Built around heads.│ │ Subordinate Clauses│
└────────────────────┘ └────────────────────┘
1. Phrasal Constituents of Sentences
Phrases are syntactic groups organized around a central, mandatory word called the Head. The category of the Head dictates the syntactic property of the entire phrase:
- Noun Phrase (NP): Headed by a noun or pronoun. (e.g., [The tall professor] smiled).
- Verb Phrase (VP): Headed by a verb. (e.g., The dog [has chased the ball]).
- Prepositional Phrase (PP): Headed by a preposition. (e.g., She ran [into the classroom]).
- Adjective Phrase (AP): Headed by an adjective. (e.g., The tea was [unbearably hot]).
2. Clausal Constituents of Sentences
A clause is a structural unit that contains at least a Subject and a Predicate (Verb). Clauses assemble to build sentences:
- Matrix (Independent) Clause: Can stand alone as a complete sentence (e.g., [The rain stopped], and we went home).
- Subordinate (Dependent) Clause: Cannot stand alone; it is syntactically embedded inside a matrix clause (e.g., We stayed inside [because it was raining]).
- Coordinate Clauses: Two independent clauses joined by a coordinating conjunction (e.g., [He cooked] but [she washed the dishes]).
4.3. Theories of Syntactic Analysis
1. Immediate Constituent (IC) Analysis
Introduced by Leonard Bloomfield and later expanded by Rulon Wells, IC Analysis cuts a sentence down into its immediate component parts, repeating the process layer by layer until it reaches individual morphemes.
- Process: A sentence like “The boy kicked the ball” is split at the top level into two primary constituents: [The boy] (NP) and [kicked the ball] (VP). These are further subdivided until the terminal nodes are isolated.
- Limitation: IC Analysis struggles to explicitly represent discontinuous constituents and deep grammatical relationships like structural ambiguity.
2. Phrase Structure Rules (PSR) & Syntactic Trees
Phrase Structure Rules are generative formulas that characterize how a syntactic node can split into smaller branches. They map the constituency grammar of a language.
- Standard Rules:
- \(S \rightarrow NP \quad VP\) (A sentence consists of a Noun Phrase followed by a Verb Phrase)
- \(NP \rightarrow (Det) \quad (Adj) \quad N\) (An NP can contain a Determiner, an Adjective, and a Noun)
- \(VP \rightarrow V \quad (NP) \quad (PP)\)
A Syntactic Tree (Parse Tree) is the graphical visualization of these phrase structure rules:
S
┌────────┴────────┐
NP VP
┌───┴───┐ ┌───┴───┐
Det N V NP
│ │ │ ┌───┴───┐
The boy kicked Det N
│ │
the ball
3. Transformational Generative Grammar (TGG)
Developed by Noam Chomsky, TGG revolutionized syntax by arguing that a language possesses a finite system of generative rules capable of creating an infinite number of sentences. It separates sentences into two structural levels:
- Deep Structure (\(D\)-Structure): The abstract mental layout of a sentence that captures its baseline semantic and thematic relationships.
- Surface Structure (\(S\)-Structure): The actual linear word order that is spoken, written, or derived after applying Transformational Rules (such as turning an active sentence into a passive one, or shifting items to form a question via Wh-movement).
- Example:
- Deep Structure: [John bought the book]
- Transformation: Passive Shift
- Surface Structure: [The book was bought by John]
4. Dependency Grammar & Universal Dependencies
Unlike constituency grammar (which groups words into phrases using chunks), Dependency Grammar rejects phrasal nodes entirely. Instead, it links words directly to one another via asymmetrical binary relations called dependencies.
- Head & Dependent: Every relationship consists of a dominating word (the Head) and a structurally modified word (the Dependent). The finite root of the whole sentence is usually the main verb.
- Universal Dependencies (UD): A modern, cross-linguistic framework that standardizes dependency grammar rules across distinct human languages for computational linguistics and AI tools.
[kicked] (ROOT/HEAD)
┌───┴───┐
(nsubj) ┌▼┐ ┌▼┐ (dobj)
[boy] [ball]
│ │
(det) │ │ (det)
┌▼┐ ┌▼┐
[The] [the]
SECTION 2: SEMANTICS
4.4. What is Semantics?
Semantics is the scientific subfield of linguistics dedicated to the study of literal meaning in language. It analyzes the meaning of individual words (Lexical Semantics) and how those word meanings combine to form phrasal and sentential meanings (Structural Semantics).
The “Meaning of Meaning”
Linguist C.K. Ogden and I.A. Richards designed the Semiotic Triangle to illustrate that meaning is not a direct link between a word and the real-world object. It is mediated by the human mind:
[ Thought / Reference ]
(Mental Concept)
/ \
/ \
/ \
/ \
/ \
[ Symbol ] ─────────────────── [ Referent ]
(The spoken word) (The real-world object)
- There is a direct relationship between the Symbol (“Dog”) and the Thought (the mental idea of a canine).
- There is a direct relationship between the Thought and the actual physical Referent (the biological animal).
- The bottom line between the Symbol and the Referent is dotted because it is indirect and purely arbitrary.
4.5. Key Theoretical Distinctions in Semantics
1. Semantics vs. Pragmatics
- Semantics: Focuses on literal, context-independent meaning. (What do the actual words mean on paper?)
- Pragmatics: Focuses on speaker meaning in physical context. (What does the speaker intend to communicate?)
- Example: “It’s cold in here.” Semantically, this is a statement about the ambient room temperature. Pragmatically, it can serve as a polite request for someone to close the window.
2. Sentence, Utterance, and Proposition
- Sentence: An abstract, non-physical grammatical unit created by the rules of syntax (e.g., a line in a grammar textbook).
- Utterance: A concrete, physical event of speech or writing produced by a specific speaker in a particular time and place. It is bounded by silence.
- Proposition: The core semantic thought or claim shared by sentences. Multiple different sentences can carry the exact same proposition.
- Example: “John loves Mary” and “Mary is loved by John” are two separate sentences, but they share the identical Proposition.
3. Text vs. Discourse
- Text: A structured sequence of written or spoken language segments evaluated purely on internal grammatical cohesiveness.
- Discourse: The interactive communication process. It looks at a text alongside its contextual, social, and pragmatic environments.
4. Reference vs. Sense
Coined by philosopher Gottlob Frege (Bedeutung vs. Sinn):
- Reference: The relationship between a language expression and the real-world entities it points to.
- Sense: The internal systemic meaning of an expression, independent of real-world objects.
- Example: The phrases “The Morning Star” and “The Evening Star” have different Senses (one refers to the morning, the other to the evening), but they share the exact same Reference (the planet Venus).
5. Denotation vs. Connotation
- Denotation: The literal, objective, primary dictionary definition of a word.
- Connotation: The subjective, cultural, or emotional associations attached to a word by speakers.
- Example: The word Hollywood. Denotation: A district in Los Angeles, California. Connotation: Glamour, celebrity lifestyle, greed, or the film industry.
4.6. Semantic Classification of Words
1. Semantic (Thematic) Roles
Semantic roles represent the conceptual responsibilities that an NP holds relative to the action of the main verb in a clause.
- Agent: The entity that deliberately initiates and performs the action (e.g., [The chef] cooked the meal).
- Theme (Patient): The entity that undergoes or is directly affected by the action (e.g., The ball hit [the window]).
- Experiencer: The entity that experiences a psychological state, emotion, or sensory perception (e.g., [Sarah] heard a noise / [John] felt cold).
- Instrument: The entity or tool used by an agent to execute the action (e.g., He cut the rope with [a knife]).
- Goal: The destination point toward which an action moves (e.g., We drove all the way to [London]).
- Source: The point of origin where an action begins (e.g., She flew into town from [Paris]).
4.7. Structural Ambiguity and Word-Sense Disambiguation
Structural (Syntactic) Ambiguity
Structural ambiguity occurs when a single string of words can be interpreted in multiple ways because the syntax permits more than one structural hierarchy.
- Classic Example:“I saw the man with the binoculars.”
- Interpretation 1 (VP Modifier): I used the binoculars to see the man. (The PP attaches to the Verb Phrase).
- Interpretation 2 (NP Modifier): The man was holding or carrying the binoculars. (The PP attaches to the Noun Phrase).
Interpretation 1: PP under VP Interpretation 2: PP under NP
VP VP
┌───┴───┐ ┌───┴───┐
V NP PP V NP
│ │ └──┐ │ ┌───┴───┐
saw the man with binoculars saw the man PP
└──┐
with binoculars
Word-Sense Disambiguation (WSD)
WSD is a computational and cognitive task that determines which exact contextual meaning of a word is intended when that word is a homonym or polysemous item.
- Example: The word “Bank”
- Context A: “The investor deposited cash into the bank.” \(\rightarrow \) WSD labels this a financial institution.
- Context B: “We sat down by the river bank to fish.” \(\rightarrow \) WSD labels this a geographical shoreline.