YOU SAID:
Never have I ever kissed a squirrel.
INTO JAPANESE
リスにキスしたことはありません。
BACK INTO ENGLISH
I never kissed a squirrel.
INTO JAPANESE
私はリスにキスしたことはありません。
BACK INTO ENGLISH
I have never kissed a squirrel.
INTO JAPANESE
私はリスにキスしたことがありません。
BACK INTO ENGLISH
I have never kissed a squirrel.
That didn't even make that much sense in English.