YOU SAID:

could not have been better.

INTO JAPANESE

これ以上のことはあり得なかったでしょう。

BACK INTO ENGLISH

It couldn't have been better.

INTO JAPANESE

これ以上のことはありませんでした。

BACK INTO ENGLISH

Nothing could have happened.

INTO JAPANESE

何も起こらなかったでしょう。

BACK INTO ENGLISH

Nothing would have happened.

INTO JAPANESE

何も起こらなかったでしょう。

BACK INTO ENGLISH

Nothing would have happened.