In grammar, a part of speech or part-of-speech (abbreviated as POS or PoS, also known as word class [1] or grammatical category [2] ) is a category of words (or, more generally, of lexical items) that have similar grammatical properties. Words that are assigned to the same part of speech generally display similar syntactic behavior (they play similar roles within the grammatical structure of sentences), sometimes similar morphological behavior in that they undergo inflection for similar properties and even similar semantic behavior. Commonly listed English parts of speech are noun, verb, adjective, adverb, pronoun, preposition, conjunction, interjection, numeral, article, and determiner.
Other terms than part of speech—particularly in modern linguistic classifications, which often make more precise distinctions than the traditional scheme does—include word class, lexical class, and lexical category. Some authors restrict the term lexical category to refer only to a particular type of syntactic category; for them the term excludes those parts of speech that are considered to be function words, such as pronouns. The term form class is also used, although this has various conflicting definitions. [3] Word classes may be classified as open or closed: open classes (typically including nouns, verbs and adjectives) acquire new members constantly, while closed classes (such as pronouns and conjunctions) acquire new members infrequently, if at all.
Almost all languages have the word classes noun and verb, but beyond these two there are significant variations among different languages. [4] For example:
Because of such variation in the number of categories and their identifying properties, analysis of parts of speech must be done for each individual language. Nevertheless, the labels for each category are assigned on the basis of universal criteria. [4]
The classification of words into lexical categories is found from the earliest moments in the history of linguistics. [5]
In the Nirukta , written in the 6th or 5th century BCE, the Sanskrit grammarian Yāska defined four main categories of words: [6]
These four were grouped into two larger classes: inflectable (nouns and verbs) and uninflectable (pre-verbs and particles).
The ancient work on the grammar of the Tamil language, Tolkāppiyam , argued to have been written around 2nd century CE, [7] classifies Tamil words as peyar (பெயர்; noun), vinai (வினை; verb), idai (part of speech which modifies the relationships between verbs and nouns), and uri (word that further qualifies a noun or verb). [8]
A century or two after the work of Yāska, the Greek scholar Plato wrote in his Cratylus dialogue, "sentences are, I conceive, a combination of verbs [rhêma] and nouns [ónoma]". [9] Aristotle added another class, "conjunction" [sýndesmos], which included not only the words known today as conjunctions, but also other parts (the interpretations differ; in one interpretation it is pronouns, prepositions, and the article). [10]
By the end of the 2nd century BCE, grammarians had expanded this classification scheme into eight categories, seen in the Art of Grammar , attributed to Dionysius Thrax: [11]
It can be seen that these parts of speech are defined by morphological, syntactic and semantic criteria.
The Latin grammarian Priscian (fl. 500 CE) modified the above eightfold system, excluding "article" (since the Latin language, unlike Greek, does not have articles) but adding "interjection". [13] [14]
The Latin names for the parts of speech, from which the corresponding modern English terms derive, were nomen, verbum, participium, pronomen, praepositio, adverbium, conjunctio and interjectio. The category nomen included substantives (nomen substantivum, corresponding to what are today called nouns in English), adjectives (nomen adjectivum) and numerals (nomen numerale). This is reflected in the older English terminology noun substantive, noun adjective and noun numeral. Later [15] the adjective became a separate class, as often did the numerals, and the English word noun came to be applied to substantives only.
Works of English grammar generally follow the pattern of the European tradition as described above, except that participles are now usually regarded as forms of verbs rather than as a separate part of speech, and numerals are often conflated with other parts of speech: nouns (cardinal numerals, e.g., "one", and collective numerals, e.g., "dozen"), adjectives (ordinal numerals, e.g., "first", and multiplier numerals, e.g., "single") and adverbs (multiplicative numerals, e.g., "once", and distributive numerals, e.g., "singly"). Eight or nine parts of speech are commonly listed:
Some traditional classifications consider articles to be adjectives, yielding eight parts of speech rather than nine. And some modern classifications define further classes in addition to these. For discussion see the sections below.
Additionally, there are other parts of speech including particles (yes, no) [lower-alpha 1] and postpositions (ago, notwithstanding) although many fewer words are in these categories.
The classification below, or slight expansions of it, is still followed in most dictionaries:
English words are not generally marked as belonging to one part of speech or another; this contrasts with many other European languages, which use inflection more extensively, meaning that a given word form can often be identified as belonging to a particular part of speech and having certain additional grammatical properties. In English, most words are uninflected, while the inflected endings that exist are mostly ambiguous: -ed may mark a verbal past tense, a participle or a fully adjectival form; -s may mark a plural noun, a possessive noun, or a present-tense verb form; -ing may mark a participle, gerund, or pure adjective or noun. Although -ly is a frequent adverb marker, some adverbs (e.g. tomorrow, fast, very) do not have that ending, while many adjectives do have it (e.g. friendly, ugly, lovely), as do occasional words in other parts of speech (e.g. jelly, fly, rely).
Many English words can belong to more than one part of speech. Words like neigh, break, outlaw, laser, microwave, and telephone might all be either verbs or nouns. In certain circumstances, even words with primarily grammatical functions can be used as verbs or nouns, as in, "We must look to the hows and not just the whys." The process whereby a word comes to be used as a different part of speech is called conversion or zero derivation.
Linguists recognize that the above list of eight or nine word classes is drastically simplified. [17] For example, "adverb" is to some extent a catch-all class that includes words with many different functions. Some have even argued that the most basic of category distinctions, that of nouns and verbs, is unfounded, [18] or not applicable to certain languages. [19] [20] Modern linguists have proposed many different schemes whereby the words of English or other languages are placed into more specific categories and subcategories based on a more precise understanding of their grammatical functions.
Common lexical category set defined by function may include the following (not all of them will necessarily be applicable in a given language):
Within a given category, subgroups of words may be identified based on more precise grammatical properties. For example, verbs may be specified according to the number and type of objects or other complements which they take. This is called subcategorization.
Many modern descriptions of grammar include not only lexical categories or word classes, but also phrasal categories, used to classify phrases, in the sense of groups of words that form units having specific grammatical functions. Phrasal categories may include noun phrases (NP), verb phrases (VP) and so on. Lexical and phrasal categories together are called syntactic categories.
Word classes may be either open or closed. An open class is one that commonly accepts the addition of new words, while a closed class is one to which new items are very rarely added. Open classes normally contain large numbers of words, while closed classes are much smaller. Typical open classes found in English and many other languages are nouns, verbs (excluding auxiliary verbs, if these are regarded as a separate class), adjectives, adverbs and interjections. Ideophones are often an open class, though less familiar to English speakers, [21] [22] [lower-alpha 2] and are often open to nonce words. Typical closed classes are prepositions (or postpositions), determiners, conjunctions, and pronouns. [24]
The open–closed distinction is related to the distinction between lexical and functional categories, and to that between content words and function words, and some authors consider these identical, but the connection is not strict. Open classes are generally lexical categories in the stricter sense, containing words with greater semantic content, [25] while closed classes are normally functional categories, consisting of words that perform essentially grammatical functions. This is not universal: in many languages verbs and adjectives [26] [27] [28] are closed classes, usually consisting of few members, and in Japanese the formation of new pronouns from existing nouns is relatively common, though to what extent these form a distinct word class is debated.
Words are added to open classes through such processes as compounding, derivation, coining, and borrowing. When a new word is added through some such process, it can subsequently be used grammatically in sentences in the same ways as other words in its class. [29] A closed class may obtain new items through these same processes, but such changes are much rarer and take much more time. A closed class is normally seen as part of the core language and is not expected to change. In English, for example, new nouns, verbs, etc. are being added to the language constantly (including by the common process of verbing and other types of conversion, where an existing word comes to be used in a different part of speech). However, it is very unusual for a new pronoun, for example, to become accepted in the language, even in cases where there may be felt to be a need for one, as in the case of gender-neutral pronouns.
The open or closed status of word classes varies between languages, even assuming that corresponding word classes exist. Most conspicuously, in many languages verbs and adjectives form closed classes of content words. An extreme example is found in Jingulu, which has only three verbs, while even the modern Indo-European Persian has no more than a few hundred simple verbs, a great deal of which are archaic. (Some twenty Persian verbs are used as light verbs to form compounds; this lack of lexical verbs is shared with other Iranian languages.) Japanese is similar, having few lexical verbs. [30] Basque verbs are also a closed class, with the vast majority of verbal senses instead expressed periphrastically.
In Japanese, verbs and adjectives are closed classes, [31] though these are quite large, with about 700 adjectives, [32] [33] and verbs have opened slightly in recent years. Japanese adjectives are closely related to verbs (they can predicate a sentence, for instance). New verbal meanings are nearly always expressed periphrastically by appending suru (する, to do) to a noun, as in undō suru (運動する, to (do) exercise), and new adjectival meanings are nearly always expressed by adjectival nouns, using the suffix -na (〜な) when an adjectival noun modifies a noun phrase, as in hen-na ojisan (変なおじさん, strange man). The closedness of verbs has weakened in recent years, and in a few cases new verbs are created by appending -ru (〜る) to a noun or using it to replace the end of a word. This is mostly in casual speech for borrowed words, with the most well-established example being sabo-ru (サボる, cut class; play hooky), from sabotāju (サボタージュ, sabotage). [34] This recent innovation aside, the huge contribution of Sino-Japanese vocabulary was almost entirely borrowed as nouns (often verbal nouns or adjectival nouns). Other languages where adjectives are closed class include Swahili, [28] Bemba, and Luganda.
By contrast, Japanese pronouns are an open class and nouns become used as pronouns with some frequency; a recent example is jibun (自分, self), now used by some as a first-person pronoun. The status of Japanese pronouns as a distinct class is disputed, however, with some considering it only a use of nouns, not a distinct class. The case is similar in languages of Southeast Asia, including Thai and Lao, in which, like Japanese, pronouns and terms of address vary significantly based on relative social standing and respect. [35]
Some word classes are universally closed, however, including demonstratives and interrogative words. [35]
Esperanto is the most widely used constructed language intended for international communication; it was designed with highly regular grammatical rules, and as such is considered an easy language to learn.
A morpheme is the smallest meaningful constituent of a linguistic expression. The field of linguistic study dedicated to morphemes is called morphology.
In grammar, a noun is a word that represents a concrete or abstract thing, such as living creatures, places, actions, qualities, states of existence, and ideas. A noun may serve as an object or subject within a phrase, clause, or sentence.
An adjective is a word that describes or defines a noun or noun phrase. Its semantic role is to change information given by the noun.
An adverb is a word or an expression that generally modifies a verb, adjective, another adverb, determiner, clause, preposition, or sentence. Adverbs typically express manner, place, time, frequency, degree, level of certainty, answering questions such as how, in what way, when, where, to what extent. This is called the adverbial function and may be performed by single words (adverbs) or by multi-word adverbial phrases and adverbial clauses.
A syntactic category is a syntactic unit that theories of syntax assume. Word classes, largely corresponding to traditional parts of speech, are syntactic categories. In phrase structure grammars, the phrasal categories are also syntactic categories. Dependency grammars, however, do not acknowledge phrasal categories.
English grammar is the set of structural rules of the English language. This includes the structure of words, phrases, clauses, sentences, and whole texts.
Linguistics is the scientific study of human language. Someone who engages in this study is called a linguist. See also the Outline of linguistics, the List of phonetics topics, the List of linguists, and the List of cognitive science topics. Articles related to linguistics include:
In linguistics, function words are words that have little lexical meaning or have ambiguous meaning and express grammatical relationships among other words within a sentence, or specify the attitude or mood of the speaker. They signal the structural relationships that words have to one another and are the glue that holds sentences together. Thus they form important elements in the structures of sentences.
Adpositions are a class of words used to express spatial or temporal relations or mark various semantic roles. The most common adpositions are prepositions and postpositions.
A limited number of Esperanto adverbs do not end with the regular adverbial ending -e. Many of them function as more than just adverbs, such as hodiaŭ "today" and ankoraŭ "yet" or "still". Others are part of the correlative system, and will not be repeated here.
In Portuguese grammar, nouns, adjectives, pronouns, and articles are moderately inflected: there are two genders and two numbers. The case system of the ancestor language, Latin, has been lost, but personal pronouns are still declined with three main types of forms: subject, object of verb, and object of preposition. Most nouns and many adjectives can take diminutive or augmentative derivational suffixes, and most adjectives can take a so-called "superlative" derivational suffix. Adjectives usually follow their respective nouns.
Traditional grammar is a framework for the description of the structure of a language. The roots of traditional grammar are in the work of classical Greek and Latin philologists. The formal study of grammar based on these models became popular during the Renaissance.
The grammar of Macedonian is, in many respects, similar to that of some other Balkan languages, especially Bulgarian. Macedonian exhibits a number of grammatical features that distinguish it from most other Slavic languages, such as the elimination of case declension, the development of a suffixed definite article, the lack of an infinitival verb, and the constructions with ima/nema formed with the auxiliary "to have", among others.
English prepositions are words – such as of, in, on, at, from, etc. – that function as the head of a prepositional phrase, and most characteristically license a noun phrase object. Semantically, they most typically denote relations in space and time. Morphologically, they are usually simple and do not inflect. They form a closed lexical category.
The Sesotho parts of speech convey the most basic meanings and functions of the words in the language, which may be modified in largely predictable ways by affixes and other regular morphological devices. Each complete word in the Sesotho language must comprise some "part of speech."
Lau, also known as Mala, is an Oceanic language spoken on northeast Malaita, in the Solomon Islands. In 1999, Lau had about 16,937 first-language speakers, with many second-language speakers through Malaitan communities in the Solomon Islands, especially in Honiara.
English adverbs are words such as so, just, how, well, also, very, even, only, really, and why that head adverb phrases, and whose most typical members function as modifiers in verb phrases and clauses, along with adjective and adverb phrases. The category is highly heterogeneous, but a large number of the very typical members are derived from adjectives + the suffix -ly and modify any word, phrase or clause other than a noun. Adverbs form an open lexical category in English. They do not typically license or function as complements in other phrases. Semantically, they are again highly various, denoting manner, degree, duration, frequency, domain, modality, and much more.
English determiners are words – such as the, a, each, some, which, this, and numerals such as six – that are most commonly used with nouns to specify their referents. The determiners form a closed lexical category in English.
English interjections are a category of English words – such as yeah, ouch, Jesus, oh, mercy, yuck, etc. – whose defining features are the infrequency with which they combine with other words to form phrases, their loose connection to other elements in clauses, and their tendency to express emotive meaning. These features separate English interjections from the language's other lexical categories, such as nouns and verbs. Though English interjections, like interjections in general, are often overlooked in descriptions of the language, English grammars do offer minimal descriptions of the category.
...the school tradition about parts of speech is so desperately impoverished