YOU SAID:
If I only knew now what I didn't know then.
INTO JAPANESE
当時知らなかったことを今知っていたら。
BACK INTO ENGLISH
I wish I knew now that I didn't know then.
INTO JAPANESE
当時は知らなかったので今知っていればよかったと思います。
BACK INTO ENGLISH
I didn't know that then, so I wish I knew it now.
INTO JAPANESE
当時は知らなかったので、今になって知りたかったと思います。
BACK INTO ENGLISH
I didn't know that at the time, and I wish I knew now.
INTO JAPANESE
当時は知りませんでした、今なら知りたかったと思います。
BACK INTO ENGLISH
I didn't know then, but I wish I knew now.
INTO JAPANESE
当時は知りませんでしたが、今なら知りたかったと思います。
BACK INTO ENGLISH
I didn't know then, but I wish I knew now.
You've done this before, haven't you.