adjective
A word that describes a noun or pronoun: a quiet room; The room is quiet.
adverb
A word that describes a verb, adjective or another adverb: She spoke quietly.
count noun
A noun you can count: apples, students, kilometres.
non-count noun
A noun you measure, not count: water, snow, time, homework.
comparative / superlative
Forms for comparing: taller, more careful (two things); tallest, most careful (three or more).
double negative
Two negative words where one is meant: I don't have no time.