The article deals with Russian imperative constructions 1Pl with particles davay(te) / day(te). It is argued that conversation-oriented approach in analysis of these imperative utterances can be very productive. On the basis of the neighboring utterances and specifics of dialogue organization one can distinguish four semantic subtypes of 1Pl imperative: propositive (which is an expression of 'suggestion' and presupposes a verbal reaction from the listener), hortative (which expresses an 'mild order' and no verbal reaction of the listener is expected), factitive permissive (expresses a request to remove obstacles for action, no verbal reaction of the listener is expected), permissive (expresses 'permission', the utterance appears as a reaction in the final part of the microdialogue). Imperative constructions are studied in two speech corpora. The difference in frequency for the four imperative subtypes in the two corpora can be explained by the difference in the amount of everyday and institutional talks in the sampling. In the corpus where institutional talks between "sellers" and "customers" are predominant most of the 1Pl imperative usages (70 %) are propositive. This is determined by the fact that such are specific strategies used by the "sellers". The research results can be used for the modeling of Russian dialogue.