良かったのに

I wish ... had

→ 良い
phrase Rare #21,734
I wish ... had Expresses regret or a wish about something that did not happen; depending on context, it can also sound like a mild reproach.
JA: もっと早く教えてくれたら良かったのに。
EN: I wish you had told me sooner.

あなたも来たら良かったのに。

I wish you had come too.

怒ったって良かったのに

You could have gotten angry.

— Cosmic Princess Kaguya! (2026)

私は日本の生まれであれば良かったのに。

I wish I had been born in Japan.

ああ…この螺旋が矛盾していたら良かったのに

Ah… I wish this spiral had been a contradiction.

— The Garden of Sinners: Paradox Spiral (2008)

死んでいたら良かったのにと思うよ。

Sometimes I wish I were dead.

昨夜、その映画見たら良かったのに。

You should have watched that movie last night.

あんな役に立たないものなど買わなければ良かったのに。

I wish I hadn't bought such a useless thing.

彼女が昨夜来ていたら良かったのに。

I wish she had come last night.

私は彼女も一緒にいてくれれば良かったのにと思った。

I wished she could have been there with me too.