The fundamental classifications of words according to their purpose in a sentence are called parts of speech. In English, there are eight conventional parts of speech:
A noun is a name for a person, location, object, or concept.
For instance, London, happiness, and cats
A pronoun takes the place of a noun.
For instance, he, she, it, and they
Verb: Defines an action or a condition.
For instance, run, is, and think
An adjective is a word that describes or alters a noun or pronoun.
For instance, blue, quick, and joyful
Adverbs are used to describe or alter verbs, adjectives, or other adverbs.
For instance: swiftly, extremely, well
A preposition indicates how a noun (or pronoun) and another word in the phrase are related.
For instance, in, on, at, and by
Connecting words, phrases, or clauses is known as conjunction.
For instance, and, but, because
Interjection: Shows shock or intense emotion.
For instance: wow! Oh! Oh no!