Noun: thing or person
Cat
Verb: action, state.
The cat runs.
Adverb: describe adjectives other adverbs
The cat runs quickly.
Pronoun: replace the noun
It runs.
Adjective: describe the noun
The black cat runs quickly.
Conjunction: join sentences
The black cat runs quickly, but it is old.
Prepositon: join a noun to another word
The black cat on the first floor runs quickly.
Interjection: exclamation.
Wow! The old cat runs quickly.