2. 分数(百分数)作主语“分数(百分数)+of+名词”结构作主语时，谓语动词的数与其中名词的数保持一致。如：About 30 percent of the pupils were absent that day. 那天大约有30%的学生未到。Three-fourths of the surface of the earth is covered by sea. 地球表面的四分之三是海。【注意】在现代英语中，有时即使该结构中的名词为复数，其谓语也可用单数(即将其视为整体)：Over sixty per cent of families own [owns] a television. 百分之六十以上的家庭已拥有电视机。 3.“one in [out of]+复数名词”作主语此时谓语动词通常用单数。如：Only one in ten students has passed the examination. 只有十分之一的学生通过了考试。One out of twelve bottles was broken. 每12个瓶子中有一个破了。【注意】在非正式文体中有时也用复数谓语。如：Nationwide, one in five adults are illiterate. 就全国范围而言，五个成年人中有一个是文盲。 4.“all of (some of, none of, half of, most of, lots of, plenty of)+名词”作主语此时谓语动词的数与其中名词的数保持一致。如：Most of the people are against the plan. 大多数人反对这个计划。Most of the Earth’s surface is covered by water. 地球的大部分地区被水覆盖。Half of the apple is bad. 这个苹果有一半是坏的。Half of the apples are bad. 这些苹果当中有一半是坏的。
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