YOU SAID:

I have not written before I left, but we had a good time.

INTO JAPANESE

私が出発する前に私は書いていないが、私たちは楽しい時間を過ごした。

BACK INTO ENGLISH

I have not written it before I left, but we had a good time.

INTO JAPANESE

私が出発する前に私はそれを書いていないが、私たちは楽しい時間を過ごした。

BACK INTO ENGLISH

I have not written it before I left, but we had a good time.