There are many words in a sentence. Each and every word has its own function. According to the function or work the words do in a sentence, words are divided into different kinds or classes called parts of speech.
There are 8 parts of speech namely noun, pronoun, adjective, verb, adverb, preposition, conjunction and interjection.
A Noun is naming word and names somebody or something. Example : Sunil runs quickly. Sunil is noun here.
Pronoun is a word used in the place of a noun. Example: Sunil is absent because he is ill.
An adjective is a word that adds to the meaning of a nounor pronoun. Example : Sita is a good girl.
Here good is adjective.
Verb is doing word and emphasises on expresses an action. Example: Sita runs quickly. They went to London. Here runs is verb.
Adverb is a word which modifies or adds to the meaning of a verb. Example : Sita writes neatly. She walks slowly. Here neatly and slowly are adverb.
Sometimes, an adverb adds to the meaning of an adjective or another adverb.
Preposition: It is a word placed before a noun or a pronoun to show its relation to another word. The pen is on the table. The Dog is under the chair. Here on and under is preposition.
Conjunction: It is a joining word and joins words or groups of words. Example: Sita and Laxmi are friends. Do or die.
Interjection: It is a word that expresses some sudden feeling. Example: Alas! He is dead. Oh! Hurry up. Here Alas and Oh are Interjection words.