PHONOLOGY AND PHONETICS

We can talk about affricatives, nasals, glides, liquids, and stops  sounds.

Fricatives:

Are made by forming a nearly complete obstruction

 [s] [z] [3] [o] [v] [f] [h]

Affricatives:

Are made by briefly stopping the airstream completely and releasing the articulators slightly so that frication noise is produce.

[ts] [d ]

Nasal

The air is release though the nose

[m] [n]  [n]

Glides

Are made with only a slight closure

[j] [w] [w]

Liquids

The air is released

[l] [r] [?]

Stops

Are made by obstructing the airstream completely in the oral cavity

[p] [b] [t] [d] [k] [g] [?]

So in this sounds we can see if the child can’t pronounce it, maybe he has some problems with the articulation, or with understanding the phonology of the letters.