不用比较级和最高级的形容词：
1）表示颜色的有：white, black
2）表示形态的有：round, square, oval, circular, triangular(三角形)，level
3)表示性质和特征的有：atomic, economic, scientific, sonic, golden, silvery, woolen, earthen, silent, full, empty, sure, dead, deaf, blind, lame, rainy
4)表示状态作表语的有：afraid, asleep, alive, ashamed, alone, aware, alike
5)表示时间、空间和方位的有：daily, weekly, monthly, annual, present, front, back, forward, backward, east, west, south, north, left, right, final
6)表示极限、主次、等级的有：maximum, minimum, utmost, main, major, chief minor, superior, inferior, senior, junior, super, favorite
7)含有绝对概念的有：absolute, entire, whole, total, perfect, excellent, thorough, complete.