YOU SAID:

I wish I could have gone with you.

INTO JAPANESE

彼女と一緒に行けなかったのは残念だ。

BACK INTO ENGLISH

I am sorry that I could not go with her.

INTO JAPANESE

彼女と一緒に行けなかったのは残念だ。

BACK INTO ENGLISH

I am sorry that I could not go with her.