- He is good at swimming.
- He is good in swimming.
- He is good for swimming.
- He is good with swimming.
What is the difference among 'good at' and ' in, with,for' in the sentence above in meaning?
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good at/with/for but good in? I don't think so. Can anyone confirm this? – Alejandro Jul 6 '16 at 5:48
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It's more idiomatic to say good at swimming than good in swimming. He is good for/with swimming seem to be odd. However, swimming is good for. you is idiomatic. – Khan Jul 6 '16 at 8:14
I've primarily heard "good in" used to reference school classes.
- "At" is generally used for activities (good at chess, good at drawing)
- "In" is used for classes or jobs (good in math class, good in his role, good in his profession)
- "With" is used for objects/things to show that the subject has skill with them (good with numbers, good with tools)
- "For" would seem to implying how the doer is beneficial (answering the question: what is he good for?)
