1、fewer是few的比较级，表示“较少的、更少的”，与复数名词连用。例句：no fewer than thirteen foreign ministers attended the session.至少有13国外长出席了这届会议。
2、fewest是few的最高级，表示“最少的”。例句：to write in a straight line is to say something clearly in the fewest possible words. 写文章不要转弯抹角,就是说要用尽可能少的词来阐明问题。