YOU SAID:
my dad is also my grandfather
INTO JAPANESE
私の父も私の祖父です
BACK INTO ENGLISH
My father is my grandfather, too.
INTO JAPANESE
私の父も私の祖父です。
BACK INTO ENGLISH
My father is also my grandfather.
INTO JAPANESE
私の父も私の祖父です。
BACK INTO ENGLISH
My father is also my grandfather.
That didn't even make that much sense in English.