YOU SAID:

what are you doing? do you not understand? this is how it has to be.

INTO JAPANESE

何をしているんだ？わからないのか？こうしなければならないんだ。

BACK INTO ENGLISH

What are you doing? Don't you see? This is what we have to do.

INTO JAPANESE

何してるの？分からないのか？これが私たちがやらなければならないことです。

BACK INTO ENGLISH

What are you doing? Don't you see? This is what we have to do.