In grammar, a part of speech (also a word class, a lexical class, or a lexical category) is a linguistic category of words (or more precisely lexical items), which is generally defined by the syntactic or morphological behaviour of the lexical item in question. Common linguistic categories include noun and verb, among others. There are open word classes, which constantly acquire new members, and close word classes, which acquire new members infrequently if at all.
Almost all languages have the lexical categories noun and verb, but beyond these there are significant variations in different languages. For example, Japanese has as many as three classes of adjectives where English has one; Chinese, Korean and Japanese have nominal classifiers whereas European languages do not; many languages do not have a distinction between adjectives and adverbs, adjectives and verbs or adjectives and nouns, etc. This variation in the number of categories and their identifying properties entails that analysis be done for each individual language. Nevertheless the labels for each category are assigned on the basis of universal criteria.
The four main parts of speech in English, namely nouns, verbs, adjectives and adverbs, are labelled form classes as well. This is because prototypical members of each class share the ability to change their form by accepting derivational or inflectional morphemes. The term form is used because it refers literally to the similarities in shape of the word in its pronunciation and spelling for each part of speech.
Neither written nor spoken English generally marks words as belonging to one part of speech or another, as they tend to be understood in the context of the sentence. Words like neigh, break, outlaw, laser, microwave and telephone might all be either verb forms or nouns. Although -ly is a frequent adverb marker, not all adverbs end in -ly (-wise is another common adverb marker) and not all words ending in -ly are adverbs. For instance, tomorrow, fast, very can all be adverbs, while early, friendly, ugly are all adjectives (though early can also function as an adverb). Verbs can also be used as adjectives (e.g. "The astonished child watched the spectacle unfold" instead of the verb usage "The unfolding spectacle astonished the child"). In such cases, the verb is in its participles form.
In certain circumstances, even words with primarily grammatical functions can be used as verbs or nouns, as in "We must look to the how's and not just the why's" or "Miranda was to-ing and fro-ing and not paying attention".
Source: Wikipedia
Almost all languages have the lexical categories noun and verb, but beyond these there are significant variations in different languages. For example, Japanese has as many as three classes of adjectives where English has one; Chinese, Korean and Japanese have nominal classifiers whereas European languages do not; many languages do not have a distinction between adjectives and adverbs, adjectives and verbs or adjectives and nouns, etc. This variation in the number of categories and their identifying properties entails that analysis be done for each individual language. Nevertheless the labels for each category are assigned on the basis of universal criteria.
- Open Word Classes:
- Adjectives
- Adverbs
- Nouns
- Verbs (except Auxiliary Verbs)
- Interjections
- Close Word Classes:
- Auxiliary Verbs
- Clitics
- Co-verbs
- Conjunctions
- Determiners (Articles, Quantifiers, Demonstratives Adjectives, and Possessive Adjectives)
- Particles
- Measure Words
- Ad-positions (prepositions, post-positions, and circum-positions)
- Pre-verbs
- Pronouns
- Contractions
- Cardinal Numbers
English words have been traditionally classified into eight lexical categories, or parts of speech (and are still done so in most dictionaries):
- Noun: any abstract or concrete entity; a person (police officer, Michael), place (coastline, London), thing (necktie, television), idea (happiness), or quality (bravery)
- Pronoun: any substitute for a noun or noun phrase
- Adjective: any qualifier of a noun
- Verb: any action (walk), occurrence (happen), or state of being (be)
- Adverb: any qualifier of an adjective, verb, clause, sentence, or other adverb
- Preposition: any establisher of relation and syntactic context
- Conjunction: any syntactic connector
- Interjection: any emotional greeting (or "exclamation")
The four main parts of speech in English, namely nouns, verbs, adjectives and adverbs, are labelled form classes as well. This is because prototypical members of each class share the ability to change their form by accepting derivational or inflectional morphemes. The term form is used because it refers literally to the similarities in shape of the word in its pronunciation and spelling for each part of speech.
Neither written nor spoken English generally marks words as belonging to one part of speech or another, as they tend to be understood in the context of the sentence. Words like neigh, break, outlaw, laser, microwave and telephone might all be either verb forms or nouns. Although -ly is a frequent adverb marker, not all adverbs end in -ly (-wise is another common adverb marker) and not all words ending in -ly are adverbs. For instance, tomorrow, fast, very can all be adverbs, while early, friendly, ugly are all adjectives (though early can also function as an adverb). Verbs can also be used as adjectives (e.g. "The astonished child watched the spectacle unfold" instead of the verb usage "The unfolding spectacle astonished the child"). In such cases, the verb is in its participles form.
In certain circumstances, even words with primarily grammatical functions can be used as verbs or nouns, as in "We must look to the how's and not just the why's" or "Miranda was to-ing and fro-ing and not paying attention".
Source: Wikipedia
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