YOU SAID:

The future ain't what it used to be.

INTO JAPANESE

今後は、昔のそれはないです。

BACK INTO ENGLISH

Now isn't that old.

INTO JAPANESE

今、古いされていません。

BACK INTO ENGLISH

Now, the old is not.

INTO JAPANESE

今、古いではありません。

BACK INTO ENGLISH

Now, the old is not.