暇だったら

if you're free

→ 暇だ
phrase Rare #42,730
if you're free The person being described as free depends on context. In hypothetical situations, it can mean “if I/he/she were free.”
JA: 暇だったら、一緒に昼ご飯を食べませんか。
EN: If you're free, would you like to have lunch together?

彼は暇だったら、魚釣りに行っていただろう。

If he had had time, he would have gone fishing.

もし暇だったら手伝えるのに。

If I were free, I could help you.

暇だったら、手伝ってください。

If you have time, please help me.