Abstract: The analysis of case records indicates that children acquire initial words at 11-14 months. Words that children get first are nouns and verbs which link with daily life and activities,then comes onomatopes. 87.5% of words and expressions children acquire in this period origi- nates from adult's teaching and children's relevant imitations. Generally adult's teaching matches with the situation and has high selection. Be- sides, children's learning is not simply imitation. Initiative and crea- tiveness is observed in the process of learning. This determines the role of adult's teaching to a certain extent. The results of this study show the factors and process of children's language acquisition.

Key words: acquisition of initial words, adult's language teaching, children's imitation, selectiveness, initiative, creativeness