YOU SAID:

I didn't know yours could do that!

INTO JAPANESE

あなたのものにそんなことができるとは知りませんでした！

BACK INTO ENGLISH

I didn't know yours could do that!

INTO JAPANESE

あなたにそんなことができるとは知りませんでした！

BACK INTO ENGLISH

I didn't know you could do that!

INTO JAPANESE

そんなことができるとは知りませんでした！

BACK INTO ENGLISH

I didn't know you could do that!