‘Intensive’ Perfect.—Many perfects seem to denote an action rather than a state resulting from an action, and to be equivalent to strengthened presents. These are often called
Such are: verbs of the senses (δέδορκα
a. But most if not all of the verbs in question may be regarded as true perfects, i.e. they denote a mental or physical state resulting from the accomplishment of the action; thus, πέφρι_κα
b. Certain verbs tend to appear in the perfect for emphasis: τέθνηκα
Herbert Weir Smyth [n.d.], A Greek Grammar for Colleges; Machine readable text [info] [word count] [Smyth].