Yeah, any self-respecting high school student from Korea would know the rule. (Or at least they used to, back in the late 80s.)
Don't ask how well they fared when faced with an actual English speaker. :/
Don't ask how well they fared when faced with an actual English speaker. :/
BTW, I learned English in school, too, but have never heard of such a rule. Still, I dare say I intuitively would follow this rule. At least all the "wrong" examples do look wrong to me.