The structural types of purpose complex sentences in Chukchi-Koryak languages

The paper examines the structural types of purpose complex sentences in Chukchi-Koryak languages and the way of their change under Russian influence during the XXth century. This influence is resulted mainly in increasing frequency of the constructions with purpose conjunctions. The specificity of the change results in each language is explained by different sociolinguistic factors: the state of language preservation, the type of language policy and the circumstances of language functioning.