Shaking Head

I seriously want to email something like this to the whole Internet.

Who's = who is.

Always.  Forever.

Whose = possessive.

Correct:

Who's coming to dinner? = Who is coming to dinner? = Correct

Whose shoes are those? = Who owns those shoes? = Correct

Wrong, Wrong, Wrong:

Who's shoes are those? = Who is shoes are those = NO NO NO

Whose going to cook dinner? = Who owns going to cook dinner? = NO NO NO

In short, if you can't substitute "who is" and having it make sense, use whose.

Eesh.