The Evolution of "Yes"

Quite some time ago Miriam learned to say "yes". It was a cute, two-syllable-with-the-"s"-drawn-out kind of yes. 

Then a few months ago, to my great disappointment, "ye-ssss" gave way to"a-hu" (I have no idea how to spell this). You know, that indiscriminate sound you make when you are agreeing with someone just to make them go away because you are busy? I couldn't get her back to "yes" no matter how hard I tried! 

Then last week, oh joy of joys, answering in the affirmative is now an enthusiastic "Ya".

 Much Better!  I can't help but wonder..... what will be next?