YOU SAID:

this the worst day I will forever.

INTO JAPANESE

これは私が永遠に最悪の日。

BACK INTO ENGLISH

It's my worst day forever.

INTO JAPANESE

永遠に私の最悪の日です。

BACK INTO ENGLISH

It is my worst day forever.

INTO JAPANESE

永遠に私の最悪の日です。

BACK INTO ENGLISH

It is my worst day forever.