Should be WHEN instead of IF: "Mind your head if bending"

[Mejcej]

Hi,
I'd like to know about one particular example of using if/when.
I read this notice on the wall. I know it wasn't written by a native English speaker, therefore my doubts.


Mind your head if bending.

In my modest opinion there should be WHEN instead of IF.
Am I right?
I like this web-page a lot. Keep it up!!!
thx mejcej

[Alan]

It could in all honesty be either. It depends on the context and also where this notice is.

A
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English as a Second Language
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[Yankee]

Hi mejcej

To me the use of 'when' would make a stronger assumption that people will have to bend for some reason where the sign is posted. Using 'if' sounds as though it is assumed that only some people will have to bend.

Amy
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"Nearly all men can stand adversity, but if you want to test a man's character, give him power." ~ Abraham Lincoln

[Ahmadov]