YOU SAID:

my grandma eated my finger

INTO JAPANESE

私のおばあちゃんは私の指を食べた

BACK INTO ENGLISH

My grandma ate my finger

INTO JAPANESE

私のおばあちゃんは私の指を食った

BACK INTO ENGLISH

My grandma ate my finger.

INTO JAPANESE

おばあちゃんが指を食べます。

BACK INTO ENGLISH

Grandma eats her fingers.

INTO JAPANESE

おばあちゃんは指を食べる。

BACK INTO ENGLISH

Grandma eats her fingers.