YOU SAID:
i can't believe you said that
INTO JAPANESE
私はあなたが言ったことを信じることができません。
BACK INTO ENGLISH
I can't believe you said that.
INTO JAPANESE
あなたが言ったことが信じられない。
BACK INTO ENGLISH
Can't believe what you said.
INTO JAPANESE
言ったことを信じることができません。
BACK INTO ENGLISH
You can't believe what you said.
INTO JAPANESE
言ったことを信じることができません。
BACK INTO ENGLISH
You can't believe what you said.
That didn't even make that much sense in English.