YOU SAID:

I can't do it when you're saying that.

INTO JAPANESE

話をしているとき、私はそれを行うことはできません。

BACK INTO ENGLISH

When you're talking about, I cannot do it.

INTO JAPANESE

あなたが話しているとき、私はそれを行うことはできません。

BACK INTO ENGLISH

When you're talking about, I cannot do it.