adjectives (bijv. nmw.) say something about a thing/object/etc.
The horrible shootings in America. They are fantastic students.The adjective is always in front of the thing/object/etc.
Adverbs (bijw.) say something about a VERB. They end in -ly.
Shootings WORK dramatically. They ANSWER fantastically
Adjective after verbs: be, look, taste, feel, seem, smell, appear