what is the exact meaning of this term:
"wouldn't happen to know anything about the La Fortuna waterfall, would you?"
i couldn't understand what is the meaning of "wouldn't happen".
why "happen" comes after "wouldn't" ?

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Answer

"Happen" can also be seen as "by chance" in this context.
"(You) wouldn't by chance know anything about the La Fortuna waterfall, would you?" 
Not to be confused with "That wouldn't happen," which has a different meaning.
Hope this helps.

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Hi
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