YOU SAID:

you can do better than her

INTO JAPANESE

あなたは彼女より上手くできる

BACK INTO ENGLISH

You can do better than her

INTO JAPANESE

彼女より上手くできるよ

BACK INTO ENGLISH

I can do better than her

INTO JAPANESE

私は彼女より上手くできる

BACK INTO ENGLISH

I can do better than her