A noun is a naming word. It names a person, place, thing, idea, living creature, quality, or action. Examples:

cowboy, theatre, box, thought, tree, kindness, arrival

Verb

A verb is a word which describes an action (doing something) or a state (being something). Examples:

walk, talk, think, believe, live, like, want

Adjective

An adjective is a word that describes a noun. It tells you something about the noun. Examples:

big, yellow, thin, amazing, beautiful, quick, important

Adverb

An adverb is a word which usually describes a verb. It tells you how something is done. It may also tell you when or where something happened. Examples:

slowly, intelligently, well, yesterday, tomorrow, here, everywhere

Pronoun

A pronoun is used instead of a noun, to avoid repeating the noun. Examples:

I, you, he, she, it, we, they

Conjunction

A conjunction joins two words, phrases or sentences together. Examples:

but, so, and, because, or

Preposition

A preposition usually comes before a noun, pronoun or noun phrase. It joins the noun to some other part of the sentence. Examples:

on, in, by, with, under, through, at

Interjection

An interjection is an unusual kind of word, because it often stands alone. Interjections are words which express emotion or surprise, and they are usually followed by exclamation marks. Examples:

Ouch!, Hello!, Hurray!, Oh no!, Ha!

Article

An article is used to introduce a noun. Examples:

the, a, an

a word that describes a noun – beautiful

a word that describes a verb – quickly

a positioning word – behind

A joining word – and

A short quick word – What!

You had better check these in a dictionary, especially the last one.