are not or is not is pronounced ain't

不是或不是是讀作ain't

ain't ain't ain't but I would be remiss  if I did not say ain't ain't a word  

不就是不就是不，但如果我不說不就是不的話，那就是失職了。

and I ain't allowed to say it which  is according to my second grade  

我不允許說，這是我二年級的時候說的。

teacher because we were never allowed  to say ain't in school so give it a try.

老師，因為我們在學校裡從來不被允許說 "不"，所以試一下吧。

Ain't

不是