Resources that explain the aorist tenses?

[Godmy]

Which color represents the aorist in the picture?

I've added some additional explanations for the picture under it, so you can read it. And it is obvious from everything that was said that it must be red one. But you should probably see our section "Grammar Tips" which explains the Latin perfect. This and this. Once you understand that, you can apply the same distinction towards the Greek imperfect and aorist.

 

[Pacifica]

The red represents the Latin perfect, to which the Greek indicative aorist is most of the time equivalent.