Movement Theory in English Syntax is a fundamental concept in linguistics, particularly in generative grammar, that explains how elements within a sentence move from their base positions to different landing sites. This theory helps us understand the structure and formation of various sentence types, going beyond the limitations of basic X-bar theory by accounting for all possible grammatical sentences in a language. For students tackling advanced English grammar, grasping movement theory is crucial for analyzing complex sentence structures.
Understanding Movement Theory: The Essentials
At its core, movement theory in English syntax posits that sentences are not just static arrangements of words but undergo dynamic transformations. These transformations involve movement rules, where phrases relocate within a sentence, and insertion/adjunction rules, where new material is added.
Consider these examples:
- Movement Rule: From "you are serious" to "are you serious?"
- Insertion Rule: From "you want the book" to "do you want the book?"
Traces and Chains in Syntactic Movement
A key aspect of movement theory is the concept of traces and chains. When a constituent (like a noun phrase or a wh-phrase) moves, it leaves behind an invisible placeholder, called a trace (t). The moved constituent (the antecedent) and its trace are co-indexed, forming a chain. This chain connects the base position (where the constituent originated) with its landing site (where it ends up).
For example, in "arei you ti serious?", 'are' moves and leaves a trace, with both 'are' and the trace sharing an index. Movement typically occurs towards the left and can involve intermediate traces, showing a cyclic nature.
Why Do Elements Move?
Movement is motivated by different syntactic needs:
- Syntactic Needs: A constituent moves to receive an adequate interpretation, such as getting a case (e.g., nominative, accusative) or matching specific features (e.g.,
[+wh]). Examples include DP movement and wh-movement. - Focalization and Emphasis: Movement can also occur to stress or highlight a constituent, placing it in a prominent position. This includes constructions like clefting ("it is John and Diane who work in a factory"), pseudo-clefting ("what John and Diane do is work in a factory"), fronting ("beans, I don’t like"), and negative inversion ("never have I seen such a thing"). Our focus here will be on movements driven by syntactic needs.
DP Movement in English Syntax
DP movement refers to the relocation of a Determiner Phrase (like a noun phrase) within a sentence. The primary motivation for DP movement is the Case Filter, which states that every overt DP must be assigned case (e.g., nominative for subjects, accusative for objects). As a result of DP movement, DPs often receive their theta role (semantic role like agent or patient) in one position and their case in another.
Raising Constructions: Explaining DP Movement
Raising is a specific type of DP movement seen in structures like "John is likely to leave." Here's how it works:
- Original Position: John receives its theta role from 'leave' in a lower clause (CP2):
[CP2 John to leave]. However, 'leave' is non-finite and cannot assign case to John. - Movement for Case: Since John cannot get case in its original position, it moves to the subject position of the higher clause (CP1) where 'is' is present:
[CP1 John~i~ is likely [CP2 t~i~ to leave]]. - Case Assignment: The finite inflection of 'is' then assigns nominative case to John.
The essence of raising is thus movement from a lower CP (CP2) to a higher CP (CP1) in search of case.
Passives and DP Movement
Passive structures are another classic example of DP movement, often contrasting with active sentences:
- Active: "the linguist kissed the neurologist" (agent, patient)
- Passive: "the neurologist was kissed (by the linguist)" (patient, agent)
While they share the distribution of theta-roles, passive constructions are not simply derived from active ones. Instead, DP movement and case assignment play a crucial role:
- Active Case Assignment: The subject DP receives nominative case from finite inflection, and the object DP receives accusative case from the verb.
- Passive Case Assignment: In a passive sentence, the verb's ability to assign accusative case is suppressed. The patient DP originates in a post-verbal position but cannot receive accusative case. Therefore, it moves to the empty subject position (due to passivization) and receives nominative case from the finite verbal inflection. For instance, in "the book was written," 'the book' moves from its original object position to the subject position to get nominative case.
Wh-Movement: Interrogative and Relative Clauses
Wh-movement involves the relocation of wh-phrases (words like what, who, where, why) to the specifier of CP (Spec CP). This movement is primarily motivated by the need for the wh-phrase to be near a [+wh] feature in the C (Complementizer) head.
Features at the CP Level
Relevant features at the CP level include:
[+/-wh]: Distinguishes structures with a wh-phrase from those without.[+/-Q]: Distinguishes declarative[-Q]from interrogative[+Q]structures.
For example:
[CP1 [CP2 what you need] is a good rest]-[+wh],[-Q][CP1 what do you need?]-[+wh],[+Q]
Wh-Movement in Interrogative Clauses
In interrogative clauses, both [+wh] and [+Q] features are active. Wh-phrases move to Spec CP, a movement restricted by locality conditions (e.g., closest landing site, subjacency).
- Root Questions: Wh-phrases move to the matrix/main Spec CP: "what
idid you buy ti?" - Embedded Questions: Wh-phrases move to the embedded/subordinate Spec CP: "I wonder [whom
iThelma will meet tiafter lunch]"
Sometimes, only the wh-word moves, or the entire wh-phrase can move, a phenomenon known as pied-piping. Compare: "I wonder [[for whom]i you bought the book ti]" (with pied-piping) versus "I wonder [whomi you bought the book for ti]" (without pied-piping).
The Story of Two Movements: Spec CP and C
In many interrogative sentences, we observe two types of movement:
- Vaux Movement: The auxiliary verb (Vaux) moves from IP (Inflectional Phrase) to C. This is triggered by the
[+Q]feature in C. - Wh-Phrase Movement: The wh-phrase moves to Spec CP. This is triggered by the
[+wh]feature in C.
Since the wh-phrase precedes Vaux in C, the wh-phrase moves to Spec CP, while Vaux moves to C. For instance: what~j~ have~i~ you t~j~ seen t~i~?
Cyclic Wh-Movement
Wh-movement is often cyclic, meaning wh-phrases might move through intermediate Spec CP positions before reaching their final landing site. This explains sentences like "whoi did you think [ti you saw ti]?" The wh-phrase 'who' moves step-by-step to the matrix Spec CP.
Wh-Movement in Relative Clauses
Relative clauses also involve wh-movement, but they are characterized by a [+wh] feature and a [-Q] feature (as they are declarative, not interrogative). Examples include:
- "this is the woman who came to see you yesterday"
- "the woman for whom English is not a first language is here"
Multiple Movements in a Single Sentence
Complex sentences can involve more than one type of movement simultaneously. For example, a sentence might combine passivization with cyclic wh-movement: "whatj did you say [tj was hit ti]?" Here, an element moves due to passivization (getting a theta role and case in its clause), and then a wh-phrase moves cyclically to the highest Spec CP.
Frequently Asked Questions (FAQ) about Movement Theory
What is the basic definition of Movement Theory in English Syntax?
Movement Theory explains how constituents (words or phrases) relocate from their original, base-generated positions to other positions within a sentence to satisfy various syntactic requirements, such as case assignment or feature matching.
Why is Movement Theory important for understanding English grammar?
It's crucial because it accounts for sentence structures that X-bar theory alone cannot generate. It reveals the dynamic processes underlying sentence formation, helping to explain phenomena like questions, passives, and relative clauses, offering a deeper insight into how English sentences are constructed.
What is the role of 'case' in DP Movement?
Case is a grammatical property (like nominative or accusative) that DPs must receive. In DP Movement, a DP that cannot receive case in its base position moves to a new position where it can be assigned case, ensuring the sentence is grammatically well-formed.
How do Raising and Passives demonstrate DP Movement?
In Raising, a DP moves from a lower, non-finite clause to the subject position of a higher clause to receive nominative case. In Passives, the object of an active sentence becomes the subject of the passive sentence, moving from its post-verbal position to receive nominative case, as the passive verb loses its ability to assign accusative case.
What are the main triggers for Wh-Movement?
Wh-Movement is primarily triggered by the [+wh] feature in the C head of a clause. This feature attracts a wh-phrase to the Spec CP position. In interrogative clauses, the [+Q] feature also plays a role, triggering the movement of an auxiliary verb to C. For a broader overview of grammatical movements, see Syntactic movement on Wikipedia.