Two sounds close enough to trade places: the “ay” of day and the “eh” of ten. Swap one for the other and a different word comes out — this page is how to keep them apart, in both directions.
Glide the vowel — start mid-open and finish with the tongue rising toward a brief ee position.
“This vowel has a tail, bello! It starts eh and slides up to a little ee. Eh-ee! Do not chop the tail off!”Nunzio, when he hears it
You cannot hear your own swap. That is the whole problem.
Nunzio records you reading a sentence, scores every sound in it on your phone — nothing is uploaded — and tells you which of these two actually came out. Nunzio — Accent Coach is coming to the App Store and Google Play.