YOU SAID:

I could play outside till the cows come home

INTO JAPANESE

牛が帰ってくるまで外で遊べた

BACK INTO ENGLISH

I could play outside until the cow came home.

INTO JAPANESE

牛が帰ってくるまで外で遊ぶことができました。

BACK INTO ENGLISH

I was able to play outside until the cow came back.

INTO JAPANESE

牛が帰ってくるまで外で遊ぶことができました。

BACK INTO ENGLISH

I was able to play outside until the cow came back.