Adjectives answer the question: "What kind?", "which one?" and "how many?"
"What kind of house?" ... "A large, yellow brick one."
"Which house?" ... "That one."
Includes articles, pronouns and demonstratives.
Including cardinal numbers, ordinal numbers ("first", "second", "last", etc)...
COMPARATIVES & SUPERLATIVES
Beware of empty comparisons.
See exercise on comparatives and superlatives here.
An adjective clause comprises a relative pronoun plus a SUBJECT plus a VERB, or a RELATIVE PRONOUN acting as a SUBJECT plus VERB. Unlike ordinary adjectives, they go after the noun they modify.
For example: "who became president last month"... WHO is a relative pronoun acting as subject, and BECAME is the verb.
GRADED AND NON-GRADED ADJECTIVES
Some adjectives can be shaded by adverbs to describe their degree (for example, "hot"). Others are absolutes (for example, "finished").