Separation of Sub-substantive Infinitive as a Phenomenon of Syntax and Punctuation

An analysis of such a phenomenon written speech as the separation infinitive in sub-substantive position is proposed from point view syntax and punctuation. As material for study, microcorpus was used, compiled by complete selection texts Russian artistic prose second half 20th - beginning 21st centuries. The relevance study lies need to clarify punctuation codification subsubstantive separation, which appeared academic science only at century. It shown that determined its participation expression explanatory relations. According author’s observations, factors determine are explicit implementation conjunction, presence cataphoric words zone explained component, inability form phrase with substantive exclamatory nature component. facts leads conclusion setting marks when separating focused on communicative-semantic principle perform meaning-distinguishing or expressive-semantic function this position. separate marked “dashes” “colons”. At same time, colon tends toward contextual specialization, dash greater frequency use.