yea, dats why my students asked, he is confused about how to
differentiate can and can't, if can't is pronounced in a way that
rhymes with pant...
I remember in US, if I pronounce flour as flar, they cannot
understand me, have to pronounce it as fla-wer 
you will be surprised how many people do not know how to
pronounce
vegetables (always pronounced as veggie-table) and relatives
(pronounced as ri-le-tives)