Since the NT does not have any aorist or perfect forms of εἰμί, I thought to look for these in the Perseus collection. After typing in the search command for aorist forms of εἰμί (lemma:εἰμί@VA), the results include future infinitives (ἔσεσθαι) as well as present imperatives (ἔστω)! So, is my morphology off or is Logos not there yet regarding the morphological analysis of the Perseus texts?