In linguistics, syntax is the study of how words and morphemes combine to form larger units such as phrases and sentences. Central concerns of syntax include word order, grammatical relations, hierarchical sentence structure (constituency), agreement, the nature of crosslinguistic variation, and the relationship between form and meaning (semantics). There are numerous approaches to syntax that differ in their central assumptions and goals.
A verb is a word that in syntax generally conveys an action, an occurrence, or a state of being. In the usual description of English, the basic form, with or without the particle to, is the infinitive. In many languages, verbs are inflected to encode tense, aspect, mood, and voice. A verb may also agree with the person, gender or number of some of its arguments, such as its subject, or object. Verbs have tenses: present, to indicate that an action is being carried out; past, to indicate that an action has been done; future, to indicate that an action will be done.
In language, a clause is a constituent that comprises a semantic predicand and a semantic predicate. A typical clause consists of a subject and a syntactic predicate, the latter typically a verb phrase composed of a verb with any objects and other modifiers. However, the subject is sometimes unvoiced if it is retrievable from context, especially in null-subject language but also in other languages, including English instances of the imperative mood.
Lexical semantics, as a subfield of linguistic semantics, is the study of word meanings. It includes the study of how words structure their meaning, how they act in grammar and compositionality, and the relationships between the distinct senses and uses of a word.
A subject is one of the two main parts of a sentence.
Theta roles are the names of the participant roles associated with a predicate: the predicate may be a verb, an adjective, a preposition, or a noun. If an object is in motion or in a steady state as the speakers perceives the state, or it is the topic of discussion, it is called a theme. The participant is usually said to be an argument of the predicate. In generative grammar, a theta role or θ-role is the formal device for representing syntactic argument structure—the number and type of noun phrases—required syntactically by a particular verb. For example, the verb put requires three arguments.
The term phrase structure grammar was originally introduced by Noam Chomsky as the term for grammar studied previously by Emil Post and Axel Thue. Some authors, however, reserve the term for more restricted grammars in the Chomsky hierarchy: context-sensitive grammars or context-free grammars. In a broader sense, phrase structure grammars are also known as constituency grammars. The defining trait of phrase structure grammars is thus their adherence to the constituency relation, as opposed to the dependency relation of dependency grammars.
In linguistics, an impersonal verb is one that has no determinate subject. For example, in the sentence "It rains", rain is an impersonal verb and the pronoun it does not refer to anything. In many languages the verb takes a third person singular inflection and often appears with an expletive subject. In the active voice, impersonal verbs can be used to express operation of nature, mental distress, and acts with no reference to the doer. Impersonal verbs are also called weather verbs because they frequently appear in the context of weather description. Also, indefinite pronouns may be called "impersonal", as they refer to an unknown person, like one or someone, and there is overlap between the use of the two.
In linguistics, valency or valence is the number and type of arguments controlled by a predicate, content verbs being typical predicates. Valency is related, though not identical, to subcategorization and transitivity, which count only object arguments – valency counts all arguments, including the subject. The linguistic meaning of valency derives from the definition of valency in chemistry. Like valency found in chemistry, there is the binding of specific elements. In the grammatical theory of valency, the verbs organize sentences by binding the specific elements. Examples of elements that would be bound would be the complement and the actant. Although the term originates from valence in chemistry, linguistic valency has a close analogy in mathematics under the term arity.
In linguistics, especially within generative grammar, phi features are the morphological expression of a semantic process in which a word or morpheme varies with the form of another word or phrase in the same sentence. This variation can include person, number, gender, and case, as encoded in pronominal agreement with nouns and pronouns. Several other features are included in the set of phi-features, such as the categorical features ±N (nominal) and ±V (verbal), which can be used to describe lexical categories and case features.
In linguistics, an unaccusative verb is an intransitive verb whose grammatical subject is not a semantic agent. In other words, the subject does not actively initiate, or is not actively responsible for, the action expressed by the verb. An unaccusative verb's subject is semantically similar to the direct object of a transitive verb or to the subject of a verb in the passive voice.
An existential clause is a clause that refers to the existence or presence of something, such as "There is a God" and "There are boys in the yard". The use of such clauses can be considered analogous to existential quantification in predicate logic, which is often expressed with the phrase "There exist(s)...".
In linguistics, nominalization or nominalisation is the use of a word that is not a noun as a noun, or as the head of a noun phrase. This change in functional category can occur through morphological transformation, but it does not always. Nominalization can refer, for instance, to the process of producing a noun from another part of speech by adding a derivational affix, but it can also refer to the complex noun that is formed as a result.
The extended projection principle (EPP) is a linguistic hypothesis about subjects. It was proposed by Noam Chomsky as an addendum to the projection principle. The basic idea of the EPP is that clauses must contain a noun phrase or determiner phrase in the subject position.
In linguistics, an argument is an expression that helps complete the meaning of a predicate, the latter referring in this context to a main verb and its auxiliaries. In this regard, the complement is a closely related concept. Most predicates take one, two, or three arguments. A predicate and its arguments form a predicate-argument structure. The discussion of predicates and arguments is associated most with (content) verbs and noun phrases (NPs), although other syntactic categories can also be construed as predicates and as arguments. Arguments must be distinguished from adjuncts. While a predicate needs its arguments to complete its meaning, the adjuncts that appear with a predicate are optional; they are not necessary to complete the meaning of the predicate. Most theories of syntax and semantics acknowledge arguments and adjuncts, although the terminology varies, and the distinction is generally believed to exist in all languages. Dependency grammars sometimes call arguments actants, following Lucien Tesnière (1959).
Araki is a nearly extinct language spoken in the small island of Araki, south of Espiritu Santo Island in Vanuatu. Araki is gradually being replaced by Tangoa, a language from a neighbouring island.
In linguistics and grammar, Avalency refers to the property of a predicate, often a verb, taking no arguments. Valency refers to how many and what kinds of arguments a predicate licenses—i.e. what arguments the predicate selects grammatically. Avalent verbs are verbs which have no valency, meaning that they have no logical arguments, such as subject or object. Languages known as pro-drop or null-subject languages do not require clauses to have an overt subject when the subject is easily inferred, meaning that a verb can appear alone. However, non-null-subject languages such as English require a pronounced subject in order for a sentence to be grammatical. This means that the avalency of a verb is not readily apparent, because, despite the fact that avalent verbs lack arguments, the verb nevertheless has a subject. According to some, avalent verbs may have an inserted subject, which is syntactically required, yet semantically meaningless, making no reference to anything that exists in the real world. An inserted subject is referred to as a pleonastic, or expletive it. Because it is semantically meaningless, pleonastic it is not considered a true argument, meaning that a verb with this it as the subject is truly avalent. However, others believe that it represents a quasi-argument, having no real-world referent, but retaining certain syntactic abilities. Still others consider it to be a true argument, meaning that it is referential, and not merely a syntactic placeholder. There is no general consensus on how it should be analyzed under such circumstances, but determining the status of it as a non-argument, a quasi-argument, or a true argument, will help linguists to understand what verbs, if any, are truly avalent. A common example of such verbs in many languages is the set of verbs describing weather. In providing examples for the avalent verbs below, this article must assume the analysis of pleonastic it, but will delve into the other two analyses following the examples.
In linguistics, subcategorization denotes the ability/necessity for lexical items to require/allow the presence and types of the syntactic arguments with which they co-occur. For example, the word "walk" as in "X walks home" requires the noun-phrase X to be animate.
This article describes the syntax of clauses in the English language, chiefly in Modern English. A clause is often said to be the smallest grammatical unit that can express a complete proposition. But this semantic idea of a clause leaves out much of English clause syntax. For example, clauses can be questions, but questions are not propositions. A syntactic description of an English clause is that it is a subject and a verb. But this too fails, as a clause need not have a subject, as with the imperative, and, in many theories, an English clause may be verbless. The idea of what qualifies varies between theories and has changed over time.
An expletive is a word or phrase inserted into a sentence that is not needed to express the basic meaning of the sentence. It is regarded as semantically null or a placeholder. Expletives are not insignificant or meaningless in all senses; they may be used to give emphasis or tone, to contribute to the meter in verse, or to indicate tense.
