YOU SAID:

Just yesterday I ate a whole potato.

INTO JAPANESE

昨日、ジャガイモを丸ごと食べました。

BACK INTO ENGLISH

I ate the whole potato yesterday.

INTO JAPANESE

昨日ポテトを全部食べました。

BACK INTO ENGLISH

I ate all the potatoes yesterday.

INTO JAPANESE

私は昨日すべてのジャガイモを食べました。

BACK INTO ENGLISH

I ate all the potatoes yesterday.