Parts of Speech with Brief Definition

Sr.#	Part of Speech	task, job, function	words as example	sentences as example
1.	NOUN	thing or person	pen, dog, work, music, town, Lahore, teacher, Ali	This is my pen. He lives in my house. We live in Lahore.
2.	PRONOUN	replaces a noun	I, you, he, she, some	Aafia is Pakistani. She is beautiful.
3.	ADJECTIVE	describes a noun	a/an, the, 69, some, good, big, red, well, interesting	My cat is big. I like big cats.
4.	VERB	action or state	(to) be, have, do, like, work, sing, can, must	Google is a web site. I like google.com.
5.	ADVERB	describes a verb, adjective or adverb	quickly, silently, well, badly, very, really	My cat eats quickly. When she is very hungry, she eats really quickly.
6.	PREPOSITION	links a noun to another word	to, at, after, on, but	We went to school on Monday.
7.	CONJUNCTION	joins clauses or sentences or words	and, but, when	I like dogs and I like cats. I like cats and dogs. I like dogs but I don't like cats.
8.	INTERJECTION	short exclamation, sometimes inserted into a sentence	oh!, ouch!, hi!, well	Ouch! That hurts! Hi! How are you? Well, I don't know.

NOTE: 
Some grammar sources categorize English into Nine (9) or Ten (10) parts of speech by dividing verbs into two parts (Lexical Verbs & Auxiliary Verbs) and by including Determiners as well. But we use the traditional categorization of eight (8) parts of speech.