Step 3: Understand that 'good' is an adjective, which describes nouns.
Step 4: Recognize that we need an adverb to describe how she sings.
Step 5: Know that 'well' is the correct adverb to use in this context.
Step 6: Replace 'good' with 'well' to correct the sentence.
Adverb vs. Adjective – Understanding the difference between adverbs and adjectives, where 'well' is the correct adverb to describe the action of singing.