Nouns .
are words used to refer to people (boy), objects (backpack), creatures (dog), places (school),
qualities (roughness), phenomena (earthquake) and abstract ideas (love) as if they were all
“things.”
Article .
are words (a, an, the) used with nouns to form noun phrases classifying those “things” (You
can have a banana or an apple) or identifying them as already known (I’ll take the apple).
Adjective .
words used, typically with nouns, to provide more information about the things referred to
(happy people, large objects, a strange
experience).