Discerning features of verbal tenses

Tense Voice Discerning letters Augment
Present All -  
Future Active σ  
Middle  
Passive θης  
Imperfect All - ἐ
Aorist Active σα ἐ
Middle
Passive θη
Perfect Active κα  
Middle -  
Passive  
Pluperfect Active κει (ἐ)
Middle -  
Passive