A term in traditional grammar for the eight categories* into which words are classified according to their functions in sentences: Nouns -The part of speech (or word class) that is used to name or identify a person, place, thing, quality, or action. Pronouns - A word (one of the traditional parts of speech) that takes the place of a noun, noun phrase, or noun clause Verbs - The part of speech (or word class) that describes an action or occurrence or indicates a state of being. There are two main classes of verbs: (1) the large open class of lexical verbs (also known as main verbs or full verbs--that is, verbs that aren't dependent on other verbs); and (2) the small closed class of auxiliary verbs (also called helping verbs). The two subtypes of auxiliaries are the primary auxiliaries (be, have, and do), which can also act as lexical verbs, and the modal auxiliaries (can, could, may, might, must, ought, shall, should, will, and would). Verbs and verb phrases usually function as predicates. They can display differences in tense, mood, aspect, number, person, and voice.
Adjectives - The part of speech (or word class) that modifies a noun or a pronoun. Adverbs - The part of speech (or word class) that is primarily used to modify a verb, adjective, or other adverb. Adverbs can also modify prepositional phrases, subordinate clauses, and complete sentences. Positions of an Adverb:
An adverb that modifies an adjective ("quite sad") or another adverb ("very carelessly") appears immediately in front of the word it modifies. An adverb that modifies a verb is generally more flexible: it may appear before or after the verb it modifies ("softly sang" or "sang softly"), or it may appear at the beginning of the sentence ("Softly she sang to the baby"). The position of the adverb may have an effect on the meaning of the sentence. Functions of an Adverb:
Adverbs typically add information about time(rarely, frequently, tomorrow), manner (slowly, quickly,...