OK, so english being pretty much a perpetual work-in-progress, with exceptions to every grammatical rule - which is it, slain or slayed?
BOTH! Beat that, French language!
Could it also be Slew? George slew the dragon. = I ran to the store? The dragon was slain by George. The dragon was slew by George. Poo, now I can't tell if slew is present tense or past tense. I shouldn't post at this time of night.