YOU SAID:
You can't teach a dog new tricks
INTO JAPANESE
犬に新しいトリックを教えることはできません
BACK INTO ENGLISH
I can not teach a dog a new trick
INTO JAPANESE
私は犬に新しいトリックを教えることはできません
BACK INTO ENGLISH
I can not teach a dog a new trick
Come on, you can do better than that.