NOUNS: name a person, place, thing, or idea.
ADJECTIVES: take a noun's place.
CONJUNCTIONS: connect words.
PRONOUNS: he, you, she.
VERBS: talk, walk, run, sleep.
ADVERBS: always, well, there, now.
PREPOSITIONS: in, at, on.
INTERJECTIONS: oh no, wow, oops, ah.