First, a bit of grammar!
- Adjectives describe nouns (and pronouns).
The quick brown fox jumps over the lazy dog.
- Adverbs mainly add to a verb, telling us how/when/where.
The fox ran quickly.
Some adjectives (not all!) can be turned into adverbs, simply by appending -ly.
Adverbs can also be applied to adjectives and other adverbs.
- The fox ran quickly. (‘quickly’ modifies the verb ‘ran’; explains how the fox ran)
- The fox ran very quickly. (‘very’ modifies the adverb ‘quickly’; explains how quickly)
- The fox ran away very quickly. (‘away’ modifies the verb ‘ran’; explains where the fox ran)
Now, to ‘good’ and ‘well’. Concentrate …
- ‘Good’ is an adjective: Jack is good at his job.
- ‘Well’ is an adverb – given in answer to the question ‘how?’: Jack did the job well.
It gets more complicated! For the senses (looking, smelling, tasting, feeling) check who/what is doing the looking, smelling, tasting, feeling.
Use ‘good’ if it’s describing a noun ie is being used as an adjective.
- Jane is looking good today.
- The dinner is smelling good.
Use ‘well’ if it’s describing the act of looking, smelling, tasting, feeling.
- Jane felt well enough to return to work.
- If the question is about emotional well-being, use ‘good’.
- If it’s about physical health, use ‘well’.
How are you?