blend combined of [t]and ]it starts out as a [t]stop and then the tongue moves into the position for].The/d3/is a blend of [d]and [3]:it starts out as a [d]and then the tongue moves into the usual position for [3].Both /tf/and can occur in initial, medial,and final positions in words /tf/and /d3/are fairly easy to perceive at normal conversational levels.The overall strength of production is important for /tf/because weakening leads to a] substitution./d/is less tense than but it is still made with considerable strength Weakening may lead to a [3]substitution.Lip rounding will help to stabilize the sound.blend combined of [t] and [ʃ]: it starts out as a [t] stop and then the tongue moves into the position for [ʃ]. The /d3/ is a blend of [d] and [3]: it starts out as a [d] and then the tongue moves into the usual position for [3]. Both /tʃ/ and /d3/ can occur in initial, medial, and final positions in words. /tʃ/ and /d3/ are fairly easy to perceive at normal conversational levels. The overall strength of production is important for /tʃ/ because weakening leads to a [ʃ] substitution. /d3/ is less tense than /tʃ/, but it is still made with considerable strength. Weakening may lead to a [3] substitution. Lip rounding will help to stabilize the sound