Still need to stabilize my voice over long sentences.
To answer blueswan's query, I have spent lots of time to practice myself and learnt from and trained with teachers to put my tongue into right place, and open my mouth properly.As long as you put tongue at right position and move it properly through the vowl [ay] and ended with [n] position, you should be able to get it right. One teacher asked me to pronounce it seperately as dray and [in] to get the right opening and closing position for tongue. After awhile, then try it in one word to move the tongue and lip from [dr] ->[ay]->[n]. At beginning, you might need to breathe enough air so that you could exhale air smoothly from [dr]->[ay]->[n].
This forum has been the excellent place for me to learn new tricks to refresh myself through videos, reading, and songs.