YOU SAID:
I would really prefer you be quiet
INTO JAPANESE
私は本当にあなたが静かであることを好むだろう
BACK INTO ENGLISH
I would really prefer you to be quiet
INTO JAPANESE
私は本当にあなたが静かにすることを好むだろう
BACK INTO ENGLISH
I would really prefer you to be quiet
That didn't even make that much sense in English.