Parts of Speech

Noun: nouns are used to talk about a person, a place, a thing or an idea.
Examples: Tom, New York, pen,  hope.

Pronoun: is used if you don't want to mention the name of a person, place, thing or idea.
Examples: I, you, they, us, he, she, it.

Verb: it describes an action.
Examples: play, eat, drink, walk.

Adverb: it describes a verb, and it is an answer of question that stars with where, when or how.
Examples: continuously, regularly, consistently.

Adjective: it describes a noun or a pronoun. 
Examples: nice, green, obese, skinny, polite.
 
Preposition: it describes the relationship between a pronoun or a noun with other word.
Examples: from, to, in, at, on, for.

Interjection: it shows an emotion. 
Examples: Hey! Oops! Well! Aha! 

Conjunction: it connects two ideas with each other.
Examples: however, but, and, or, yet. therefore, because.