YOU SAID:

If fighting is sure to win the victory, then you must fight.

INTO JAPANESE

戦えば必ず勝利するのであれば、戦わなければなりません。

BACK INTO ENGLISH

If you are going to win if you fight, then you must fight.

INTO JAPANESE

戦えば勝てるのなら、戦わなければなりません。

BACK INTO ENGLISH

If you can win by fighting, then you must fight.

INTO JAPANESE

戦って勝てるなら戦わなければなりません。

BACK INTO ENGLISH

If you can fight and win, you must fight.

INTO JAPANESE

戦って勝てるなら戦わなければなりません。

BACK INTO ENGLISH

If you can fight and win, you must fight.