Part 2 - Swimming
Swimming is an action applying to nothing. Understand "swim" as swimming.
Report swimming:
say "You think you knew how to swim, once, but you can't remember it now."
Swimming directionally is an action applying to one thing. Understand "swim [direction]" as swimming directionally.
Instead of swimming directionally:
try swimming.
Swimming objectionably is an action applying to one thing. Understand "swim in/to [something]" and "swim [something]" as swimming objectionably.
Instead of swimming objectionably:
try swimming.