I know soccer. (Highest confidence)
I know soccer well. (Ok, less natural)
I know a lot about soccer. (Ok, more natural)
October 30, 2019
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I know about football well. - nope, sorry.
I know football well - fone, correct, natural in countries that use adverbs well. :)
I know a lot about football - yes fine, correct, basically the same.
October 30, 2019
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You could say. I know a lot about football.
October 30, 2019
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