Previously reported data (Brown, 1973) on language acquisition were analyzed to provide information about the correspondence of form, function, and meaning. The spontaneous speech records of two children were investigated. The observation period began when the boy was 25 months old and the girl was 18 months old and lasted 11 months. The linguistic forms they used to refer to themselves as possessors and form-meaning and form-function correspondence were examined. The nominal form was retained during the period that the prenominal form appeared. Both children used both forms over a long period of time. Both children constructed a form-function relationship that does not exist in the target language they were acquiring and continued to use this construct for a long period of time in a systematic way. As the children developed the adult form of language, they constructed their own hypotheses about the connection between linguistic forms, meanings, and functions. Analytical results support the view that language acquisition is a step-wise approximation to the target language using a hypothesis construction. (RW)