YOU SAID:

If I was rich I would buy a car

INTO JAPANESE

もし私が金持ちだったら、私は車を買うだろう

BACK INTO ENGLISH

If I were rich, I would buy a car.

INTO JAPANESE

もし私が金持ちだったら、車を買うだろう。

BACK INTO ENGLISH

If I were rich, I would buy a car.