The comparative and superlative for "FUN"

问题描述:

The comparative and superlative for "FUN"
I think it's supposed to be "funner" and "funnest",because the syllable for "fun" is only one!Why they say "more fun" and "most fun".I wonder,I wonder,I wonder!

"fun" as an adjective is a very informal usage.
Neither "more fun" nor "funner" is recommended in writings.
it should be "funnier" and "funniest"
in spoken English,grammar doesn't matter that much.