YOU SAID:

I would've done this if I had not been so awfully ill

INTO JAPANESE

こんなにひどい病気になっていなかったらそうしていたでしょう

BACK INTO ENGLISH

I would have done that if I hadn't been so ill

INTO JAPANESE

そんなに病気じゃなかったらそうしてたのに

BACK INTO ENGLISH

I would have done it if I hadn't been so sick

INTO JAPANESE

そんなに病気じゃなかったらやってたのに

BACK INTO ENGLISH

I would have done it if I hadn't been so sick