I cannot see how "thou past" could be correct! It looks like someone has confused "passed" and "past" (actually a fairly common mistake in modern English). I have nothing to go on but gut reaction, but "thou past" looks very wrong. I feel the same about "thou lovedest" - I think "thou lovedst" would work, but "lovedest" just looks and sounds horrible.
Somebody said that thou past is also right. Please comment on this, too.
- to love: thou lovest, thou loved(e)st
Thou didst pass.What the past tense of "thou passest"?