YOU SAID:

I can't do it anymore

INTO JAPANESE

今はもうそれを行うことはできません。

BACK INTO ENGLISH

You can't do it anymore now.

INTO JAPANESE

あなたはもう、今それを行うことはできません。

BACK INTO ENGLISH

You now cannot do it now.

INTO JAPANESE

あなたは今それを今行うことはできません。

BACK INTO ENGLISH

You can now do it now.

INTO JAPANESE

今それを今行うことができます。

BACK INTO ENGLISH

You can now do it now.