A Participle is a word derived from a verb, participating the properties of a verb, and of an adjective or a noun; and is generally formed by adding ing, d, or ed, to the verb: thus, from the verb rule, are formed three participles, two simple and one compound; as, 1. ruling, 2. ruled, 3. having ruled.

An Adverb is a word added to a verb, a participle, an adjective, or an other adverb; and generally expresses time, place, degree, or manner: as, They are now here, studying very diligently.

A Conjunction is a word used to connect words or sentences in construction, and to show the dependence of the terms so connected: as, "Thou and he are happy, because you are good."-Murray.

A Preposition is a word used to express some relation of different things or thoughts to each other, and is generally placed before a noun or a pronoun: as, "The paper lies before me on the desk."

An Interjection is a word that is uttered merely to indicate some strong or sudden emotion of the mind: as, Oh! alas! ah! poh! pshaw! avaunt! aha! hurrah.