以前的事

things of the past

→ 以前
phrase Rare #19,775
things of the past Refers to something that happened in the past, often used when saying it is over or no longer important. Often follows 很久 (a long time) and may be followed by 了.
CH: 别再提以前的事了。
EN: Don't bring up things from the past anymore.

很久很久以前的事

That was a very, very long time ago.

— 记忆中的玛妮 (2014)

那是很久很久以前的事

That was a very, very long time ago.

— 记忆中的玛妮 (2014)

那都是以前的事

That’s all in the past now.

— 小偷家族 (2018)

以前的事已经过去了

What's past is past.

— 英雄本色 (1986)