YOU SAID:

I wish I didn't learn how to peel a banana

INTO JAPANESE

バナナの皮をむく方法を学ばなかったらいいのに

BACK INTO ENGLISH

I wish I hadn't learned how to peel bananas

INTO JAPANESE

バナナの皮をむく方法を学んでいなかったらよかったのに

BACK INTO ENGLISH

I wish I hadn't learned how to peel bananas