YOU SAID:

oh so that's why I'm not allowed to kill people

INTO JAPANESE

ああ、なぜ私は人を殺すことできません。

BACK INTO ENGLISH

Oh, why I can't kill people.

INTO JAPANESE

ああ、なぜ私は人を殺すことはできません。

BACK INTO ENGLISH

Yes. Why?

INTO JAPANESE

ああ なぜだ？

BACK INTO ENGLISH

Yes. Why?