他20岁时，永远离开了家。

When he was 20, he left home ___for ___good.

他之前租了这处房产，但永远回到了斯里兰卡。

He was renting this property previously, but he went back to Sri Lanka ___for ___good.

战后，他们决定永远移居国外。

After the war, they decided to move abroad ___for ___good.