Adjectives
Adjectives are an important part of speech. They usually describe a person or thing. They tell us what somebody or something is like.
What is an Adjective?
With What is an Adjective? Quiz
Comparative Adjectives
richer, more exciting
With Comparative Adjectives Quiz
Superlative Adjectives
richest, most exciting
With Superlative Adjectives Quiz
Superlative/Comparative Song 
My cute dog is cuter than your ugly dog...
Proper Adjectives
the Russian winter, a Shakespearean sonnet
Adjective Order
beautiful, long, dark brown
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Adjective Gradability
rather hot, hot, very hot; hot, hotter, the hottest
With Adjective Gradability Quiz
See also nouns as adjectives
coffee cup, bus station, research centre