YOU SAID:
He couldn't believe that it's not butter!
INTO JAPANESE
彼はそれがバターではないことが信じられませんでした！
BACK INTO ENGLISH
He did not believe that it is not in butter!
INTO JAPANESE
彼はそれがバターになっていないことを信じていませんでした！
BACK INTO ENGLISH
He did not believe that it is not in butter!
Well done, yes, well done!
