YOU SAID:

I am not the one who was with her last night

INTO JAPANESE

私は昨夜彼女と一緒にいた人ではない

BACK INTO ENGLISH

I am not the one who was with her last night.

INTO JAPANESE

昨夜彼女と一緒にいたのは私ではありません。

BACK INTO ENGLISH

I was not with her last night.

INTO JAPANESE

私は昨夜彼女と一緒にいなかった。

BACK INTO ENGLISH

I wasn't with her last night.

INTO JAPANESE

私は昨夜彼女と一緒にいませんでした。

BACK INTO ENGLISH

I was not with her last night.

INTO JAPANESE

私は昨夜彼女と一緒にいなかった。

BACK INTO ENGLISH

I wasn't with her last night.

INTO JAPANESE

私は昨夜彼女と一緒にいませんでした。