Alexander Loney, «Narrative Structure and Verbal Aspect Choice in Luke.», Vol. 18 (2005) 3-31
In order to represent the actions of past-time narrative, Luke can choose to employ either the aorist or the imperfect tense, that is, either the perfective or the imperfective aspect. By selecting one tense over the other Luke manipulates verbal aspect to give organization to his episodic narrative and to create contrastive prominence (enargeia) within individual pericopes. In this way, he follows in the tradition of his historiographical predecessors –most notably Thucydides– who, through their subtle play with verbal aspect, composed narratives concerned with at once the factual representation of the past and their own contemporary, didactic purposes.