YOU SAID:

I will eat your toes I’m sure of it.

INTO JAPANESE

あなたの足の指を食べてやるよ、きっと。

BACK INTO ENGLISH

I'm sure I'll eat your toes.

INTO JAPANESE

きっと足の指を食べてしまうよ。

BACK INTO ENGLISH

I'm sure he'll eat your toes.

INTO JAPANESE

きっと彼はあなたの足の指を食べてしまうでしょう。

BACK INTO ENGLISH

I'm sure he'll eat your toes.