動詞

Verb — Grokipedia Fact-checked by Grok 3 months ago Verb Ara Eve Leo Sal 1x A verb is a part of speech that typically expresses an action, occurrence, or state of being. It is often identified by its ability to convey tense—such as past, present, or future—through inflectional changes or auxiliary elements in many languages. [1] For example, in languages with rich morphology, verbs like those meaning "walk" may form past tense as "walked," while others change more irregularly, such as "go" to "went." Verbs encompass not only physical actions but also mental processes (e.g., "think"), perceptual states (e.g., "seem"), and existence (e.g., "be"). [2] The English term "verb" derives from the late 14th-century "verbe," borrowed from Old French "verbe" and ultimately from Latin verbum ("word"), rooted in the Proto-Indo-European wer- ("to speak"), highlighting its historical link to core expressive elements of language . [3] In syntax across languages, verbs typically form the core of the predicate, often requiring agreement with subjects in features like person and number (e.g., singular "runs" vs. plural "run"), and they may combine with auxiliaries to express complex tenses, aspects, or moods. This role is crucial for indicating temporality , viewpoint, and other grammatical relations in communication. [1] In linguistic typology , verbs are generally an open word class, permitting the creation of new forms to reflect evolving usage, such as neologisms derived from other parts of speech . Overview Definition and characteristics A verb is a fundamental part of speech in linguistics that denotes events, encompassing actions, processes, states, or changes of state. [4] This category contrasts with nouns, which primarily refer to entities, by focusing on dynamic or static situations involving participants. Semantically, verbs encode temporal relations and event structure, often specifying whether an event is ongoing, completed, or habitual through aspectual distinctions. [5] Syntactically, verbs function as the head of the verb phrase (VP) and typically occupy the core position in the predicate of a clause , linking the subject to additional arguments or complements. [5] They exhibit valency, determining the number and type of obligatory or optional arguments required, such as agents, patients, or themes, which shapes sentence construction—for instance, transitive verbs like "hit" require an object, while intransitive verbs like " sleep " do not. [6] Verbs also govern agreement with subjects in person , number, and sometimes gender , as seen in languages like Spanish where the verb form changes based on the subject's features (e.g., hablo for "I speak" vs. hablan for "they speak"). [7] Morphologically, verbs are distinguished by rich inflectional paradigms in many languages, marking categories like tense (past, present, future), mood (indicative, subjunctive), voice (active, passive), and aspect (perfective, imperfective). [8] For example, English verbs conjugate for tense and person in the present (e.g., walks vs. walk ), while more synthetic languages like Swahili inflect for multiple categories simultaneously. This inflectional capacity sets verbs apart from non-inflecting categories like adverbs. Semantically and syntactically, verbs often allow for derivation into other forms, such as nominalizations (e.g., "run" to "running"), reflecting their central role in event conceptualization. [9] Cross-linguistically, the verb category is considered virtually universal, though its realization varies; some languages lack distinct verb forms or rely on auxiliary systems, yet verbs consistently anchor temporal and aspectual information in clauses. [10] In theoretical frameworks like generative grammar , verbs project hierarchical structures (e.g., VP within IP or TP) that encode these properties, underscoring their role in sentence interpretation. [7] Role in sentences Verbs function as the head of the verb phrase (VP), which forms the predicate of a clause and expresses the primary action, state, event, or relation in a sentence. In syntactic structure , the verb determines the overall organization of the clause by projecting its arguments—such as subjects and objects—and specifying their thematic roles, thereby licensing the necessary complements to form a complete proposition . For instance, in the sentence "The cat chased the mouse," the verb "chased" heads the VP, requires a subject (agent) and an object ( patient ), and conveys the event's directionality and completion. [11] As the syntactic head, verbs impose selectional restrictions on their complements, dictating the category and semantic properties of elements they combine with; for example, transitive verbs like "devour" select noun phrases as direct objects, while intransitive verbs like "sleep" do not permit them. This head-driven projection principle ensures that the verb's subcategorization frame shapes the clause's hierarchical structure, as outlined in phrase structure grammars where sentences (S) consist of a noun phrase (NP) specifier and a VP complement. Verbs also bear inflectional morphology that marks tense, aspect, mood, and voice, anchoring the sentence temporally and modally—e.g., "walks" indicates present habitual action in third-person singular contexts. [12] [13] In sentence production and comprehension, verbs play a pivotal role by integrating lexical meaning with syntactic relations, facilitating the mapping from conceptual structure to linear word order . Psycholinguistic studies demonstrate that verbs are often retrieved early in sentence formulation, guiding the selection of arguments and influencing processing efficiency; for example, verbs with high argument complexity, like ditransitives ("give"), demand more planning resources than simple intransitives. This centrality underscores verbs' function in establishing coherence across clauses, including coordination and subordination, where they maintain aspectual and temporal continuity. [14] [15] Functional Classification Lexical verbs Lexical verbs, also referred to as main verbs or full verbs, constitute the core class of verbs that carry substantial semantic content, denoting actions, states, processes, or events in a sentence. [16] Unlike functional categories such as auxiliaries, lexical verbs express rich, complex meanings that contribute directly to the propositional content of utterances, such as "eat" for consumption or "run" for physical motion. [17] They form an open lexical class, allowing for the continual addition of new members through borrowing, derivation, or coinage, which contrasts with the finite, closed inventory of auxiliary and modal verbs. [18] Syntactically, lexical verbs exhibit robust inflectional properties, including marking for tense (e.g., present "plays" vs. past "played"), aspect (e.g., progressive "is playing"), mood, person, and number, particularly in languages like English where third-person singular present forms add an -s suffix. [16] These verbs typically head verb phrases and license arguments such as subjects and objects, enabling them to function as the predicate nucleus in clauses, as in "She devours the book rapidly." [18] Semantically, they profile dynamic relationships that unfold sequentially over time, distinguishing them from more static categories like nouns or adjectives. [18] In functional classification , lexical verbs differ from auxiliaries in their inability to stand alone as the sole verbal element in a tensed clause ; auxiliaries , such as "be" or "have," provide grammatical support for tense, aspect, or voice but lack independent lexical meaning and must co-occur with a lexical verb. [17] For instance, in "She has eaten," "has" is auxiliary while "eaten" is the lexical verb bearing the core semantics of consumption. [17] This distinction underscores lexical verbs' role as the semantic backbone of sentences , with auxiliaries serving a subordinate, structural function. [19] Cross-linguistically, lexical verbs may incorporate classifiers or deictic elements in sign languages like American Sign Language , enhancing their expressive capacity for events involving spatial or referential details. [16] Auxiliary and modal verbs Auxiliary verbs, also known as helping verbs, assist the main lexical verb in a clause by contributing grammatical information related to tense, aspect, voice, or mood, without carrying primary semantic content themselves. [20] In English, the core auxiliary verbs are be , have , and do , each serving distinct functions: be forms progressive aspects (e.g., "She is running") and passive constructions (e.g., "The book was read"), have marks perfect aspects (e.g., "They have finished"), and do supports negation, questions, and emphasis in simple tenses (e.g., " Do you understand?"). [21] These verbs differ from lexical verbs in that they cannot stand alone as predicates and lack independent lexical meaning, instead embedding within the verb phrase to modify the main verb's grammatical properties. Modal verbs form a specialized subclass of auxiliaries that encode modality, expressing notions such as possibility, necessity, permission, ability , or obligation , thereby situating the proposition relative to the speaker's judgment. [22] In English, prototypical modals include can , could , may , might , must , shall , should , will , and would , which precede the base form of the main verb without inflection for tense, person , or number (e.g., " She can swim" for ability ; " You must leave" for obligation ). [23] Unlike primary auxiliaries like be and have , modals do not participate in progressive or perfect constructions and exhibit defective paradigms, lacking non-finite forms such as infinitives or participles. [24] Linguistically, auxiliaries and modals occupy a unique syntactic position, often analyzed as functional heads in the verb phrase that project less structure than lexical verbs, enabling phenomena like sub