你好,单纯的分数做主语时,无论其大小,谓语都要用单数形式。例如:1. One third is bigger than one quarter. (三分之一多于/大写四分之一。)2. Two and three-tenths equqls two point three. (二又十分之三等于二点三。)如果是分数修饰名词作主语时,谓语动词的单复数取决于这个名词是否可数。一. 如果是不可数名词,则谓语动词用单数。例如: One-third of the water in this river is polluted. (这条河里面的水,三分之一都被污染了。)二. 如果是可数名词,则谓语动词用单数。例如: One-third of the students are girls. (这些学生中三分之一是女生。)