Letter Dhaal is pronounced  with tip of the tongue touching bottom edges of upper two front teeth (incisors)  There should be enough protrusion of the tip tongue 


Letter Daad  is pronounced when up turned side or sides of the tongue touches the upper back teeth (pre-molars) 

Letter Zaa  is pronounced with tip  of the tongue touching the edge of the lower two front teeth and lightly touching the upper two front teeth as well . it will produce  whistling sound


Hurooful Lathwiyya   

Letter Daad  

Huroofus Safier