Go for ZNO 2020: usage problems: Good, well:

·         Good is an adjective and must not be used as an adverb after an action verb.  Well is usually an adverb and be used after an action verb.  Well can also be an adjective when it is used to mean “healthy.”  Therefore, it can be used after a linking verb, for example, “I feel well.”

·         I am a good singer. I sing well.

·         I feel well, doctor.