Reegeee wrote:You say, 'I'll be there in AN hour', not 'A hour' whereas that's wrong cos the next word doesn't start with a vowel. The H is silent though so that's why it works.
I dunno why I even brought it up to be honest.
As you said, it goes by pronunciation, not spelling. You asked why is it 'an hour' as a tricky question for us? Even a thick painter could answer that!