Actually, it's true that whatever you pronounce Farang will understand kha.
Coz for me, I knew the theory but can't use it in reality coz it's too difficult. I don't understand why it never comes out naturally....sigh...
sh is that you sheeewwww out the wind by letting the tongue staying near the wall of your teeth kha.
but ch is that cheeeewww out of the wind by holding the tongue deep inside the mouth kha, approx in the middle of the mouth na.
Hope you get it :p
22 ต.ค. 46 08:15:42