Use good as an adjective to describe a noun (a good book, the food is good). Use well as an adverb to describe how an action is done (she sings well); “well” can also be an adjective meaning healthy (I feel well).
The Core Difference
“Good” is an adjective — it describes people, places, or things (nouns): a good movie, good weather, she is a good teacher. It follows linking verbs like “be”, “seem”, and “look” when describing a quality: this tastes good.
“Well” is normally an adverb — it describes how an action is performed, modifying a verb: he plays well, she did well on the test. Confusingly, “well” can also be an adjective, but only when talking about health: I don't feel well, get well soon.
- describes a noun → good: a good idea, the coffee is good
- describes an action / health → well: he cooks well; I feel well
Good and Well in Context
This is a really good restaurant.
She speaks French very well.
The team performed well under pressure.
That's a good point you're making.
I feel well now, and the meeting went well, which is good news.
Common Mistakes
| Incorrect | Correct | Why |
|---|---|---|
| ✗ she sings good | ✓ she sings well | describes the verb “sings” |
| ✗ he did good on the exam | ✓ he did well on the exam | describes the verb “did” |
| ✗ the meeting went good | ✓ the meeting went well | describes the verb “went” |
| ✗ it worked out good | ✓ it worked out well | describes the verb “worked” |
| ✗ the team played very good | ✓ the team played very well | describes the verb “played” |
GOOD describes a THING (noun) — both are short, solid words. WELL describes an ACTION (verb) — think “well done!”, which always praises how something was done, not what it is.
Related Questions
- Good vs Well — full confusing-words comparison page with additional examples and exercises.
- All Confusing Words — browse all 300+ word-pair guides.
- All Questions — more quick-answer pages.
- Grammar Quiz — test your knowledge of confusing word pairs.
Frequently Asked Questions
What is the core grammar rule for good vs well?
“Good” is an adjective and describes nouns (a good film, good news). “Well” is normally an adverb and describes verbs — how an action is performed (she sang well, he drives well).
Is I'm good an acceptable answer to how are you?
Yes, in informal, everyday speech, “I'm good” is widely accepted and extremely common, especially in American English. In more formal or careful speech, “I'm well” is considered more grammatically precise, since it addresses health/condition using the adjective sense of “well”.
Why can well be an adjective in some sentences?
“Well” functions as an adjective specifically when describing physical or mental health: “I feel well”, “she looks well after her illness”. In this narrow use, it behaves like “healthy”, not like a typical adverb.
Is she looks good the same as she looks well?
No — “She looks good” usually comments on appearance (attractive, stylish), while “She looks well” comments on health (she appears healthy, recovered from illness). Both are grammatically correct but mean different things.
Does good ever function as an adverb?
In very informal speech (especially American English), “good” is sometimes used where “well” is grammatically expected (“he did good”), but this is considered nonstandard in formal writing and speech, where “well” remains correct.
What does well done mean?
“Well done” is a fixed expression of praise for something performed successfully, always using “well” (an adverb describing how something was done) — never “good done”.
Is tastes good or tastes well correct?
“Tastes good” is correct, because “taste” here functions as a linking verb (like “be” or “seem”) and is followed by an adjective describing the food itself, not describing how an action was performed.
Why do linking verbs take good instead of well?
Linking verbs (be, seem, look, taste, smell, feel used in the sense of perception) connect the subject to a descriptive adjective, not an adverb — so “the soup tastes good” describes the soup (a noun), taking the adjective “good”, not the adverb “well”.
Is get well soon using well as an adverb?
No — in “get well soon”, “well” is an adjective meaning healthy, describing the state the person should return to, not describing how the “getting” happens.
Do IELTS and Cambridge exams penalise good/well mix-ups?
Yes — using “good” where an adverb is grammatically required (e.g., “she did good” instead of “she did well”) is flagged as a grammatical accuracy error in formal writing and speaking assessments.