Confusing parts of speech: Nouns, Verbs, Adjectives, and Adverbs.
Adjectives modify Nouns. Adverbs modify Verbs. Prepositions are typically followed by V-ing or Nouns.
She sings beautiful.
She sings BEAUTIFULLY.
Pay attention to word suffixes: -tion (Noun), -ly (Adverb), -ful/-ive (Adjective).