YOU SAID:
I don't believe you know what I am able to do
INTO JAPANESE
私ができることをあなたが知っているとは思えない
BACK INTO ENGLISH
i don't think you know what i can do
INTO JAPANESE
私に何ができるかあなたは知らないと思う
BACK INTO ENGLISH
i don't think you know what i can do
That didn't even make that much sense in English.