EN
The article discusses the problems of difficulties in the acquisition of derivational rules in profoundly hearing-impaired children in terms of the degree of knowledge of expressive constructions. On the basis of studies in two groups of children with an analogous (profound) hearing loss measured in audiological terms, but with a different level of actual hearing performance (speaking children and children using a sign language), the paper presents and discusses their achieved level of comprehension and production of selected hypocoristic and augmentative construction.