That was a long time ago.

- If you hate alcohol and cigarettes so much, why did you drink and smoke when you were in college? / Если ты так ненавиишь сигареты и алкоголь, почему ты пил и курил, когда был студентом?

- That was a long time ago, okay? / Это было давно.

It should have been done a long time ago.

I haven't seen you for so long.

in a long ago

way back

Way back, in a long ago people didn't have any religions. / Давным-давно у людей не было никаких религий.

I should have done that a long time ago.

We've been friends a long time.

I've been wanting to try this.

Как давно это было? перевод на английский

How long ago was that?

это было давно перевод на английский

It was many years ago.

мы не виделись очень давно перевод на английский

We haven't seen each other for a long time.