YOU SAID:

what ever goes up must come down

INTO JAPANESE

いままでは上がる降りてくる必要があります。

BACK INTO ENGLISH

Up to now must come down.

INTO JAPANESE

今まで降りてくる必要があります。

BACK INTO ENGLISH

You should come down until now.

INTO JAPANESE

あなたは今まで降りてくる必要があります。

BACK INTO ENGLISH

You should come down to you.

INTO JAPANESE

あなたに、降りてくる必要があります。

BACK INTO ENGLISH

You should come down to you.