I'm never coming back.

I'm walking out and I'm never coming back. / Я ухожу и я никогда не вернусь.

like never before

Ladies and gentlemen, our nation is devided like never before. / Дамы и господа, наша нация разделена, как никогда раньше.

I will never forget this moment.

This is a very special day. I will never forget this moment. / Это очень особенный день. Я никогда не забуду этот момент.

They never really had any money.

I've never had any friends.

I've never seen a woman drink that much.

We'll never know the future.

You'll never guess.

It's never too late.

I never thought of it this way.