How are 飲んだ、and 飲んである different？


What makes 飲んだ、and 飲んである different?

Don't they both describe the concept of drinking in the past?

More generally, what are the differences between the past tense of a verb, and
the auxiliary verb ある？




Where does 飲んである come from? I can't think of any legitimate construction off
the top of my head. 飲んでいた？

飲んだ is the simple past of 飲む. 飲んでいた is the past progressive or past perfect.

[Later edit] The context for 飲んである is like 冷蔵庫に入ってる牛乳が飲んであった？

Then this 飲んで is a 連用形 word modifying ある and the subject is 牛乳 (and naturally,
the subject of 飲む is someone who drank it)

