だったらいいのに

I wish it were

→ だ
phrase Rare #25,154
I wish it were Expresses a wish for something that is not true or is unlikely to happen.
JA: 明日が休みだったらいいのに。
EN: I wish tomorrow were a day off.

毎日土曜日だったらいいのに。

I wish every day were Saturday.

それが本当だったらいいのに。

I wish that were true.

トムの言ってたことが全部嘘だったらいいのに。

I wish everything Tom said were a lie.