YOU SAID:

When you can't eat beans eat potatoes

INTO JAPANESE

豆が食べられない時はジャガイモを食べる

BACK INTO ENGLISH

Eat potatoes when you can't eat beans.

INTO JAPANESE

豆が食べられないときはジャガイモを食べる。

BACK INTO ENGLISH

When beans can not be eaten, they eat potatoes.

INTO JAPANESE

豆が食べられないとき、彼らはジャガイモを食べます。

BACK INTO ENGLISH

When beans can not be eaten, they eat potatoes.