I would be grateful if someone would explain the difference between "swimming can/may be dangerous".
In meaning, there is no difference.
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Vladvdifference between "swimming can/may be dangerous".
Personally, I would use 'can' if the activity of swimming were the main topic of discussion and I wanted to make a general statement about the safety of it, compared to other activities perhaps: "Walking is generally safe, but swimming can be dangerous." (A general potential for danger.)
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