是不是状语句子(不是说从句)否定都是在前面加个not?

问题描述:

是不是状语句子(不是说从句)否定都是在前面加个not?
比如
I know some prices,but not that of the biggest painting over there...

当然不能这样说啰
but not that of the biggest painting over there... 可看成一个省略的句子but I do not know the price of the biggest painting over there
若非如此,则不能加个NOT就完事.