'Past indefinite' is not a term used by native grammarians, and it is an inappropriate term, since it can be quite definite: Mother died in 1968 . This is called simple past . If you use the Search box at the upper right of the screen, you will find many threads talking about the differences between simple past and past perfect.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
Anonymouspast indefinitePersonally, I find it impossible to say what the "past indefinite" even is. I have always believed that it was an old name for "present perfect", in harmony with what "past indefinite" means in French and Italian, and some modern writers agree with this interpretation: