Aorist is a Greek tense that generally implies past time and external aspect. Aorists are further distinguished into first aorists (BBG chapter 23) and second aorists.
Aorist verbs always take an augment.
Tense | Tense Formative | Augment |
Present | no | no |
Imperfect | no | yes |
First Aorist | yes | yes |
Second Aorist | no | yes |
Future | yes | no |
Perfect | yes | no |
Be sure to also study the aorist passive.