536　percent和percentage

① percent意为“百分之……”，前面必须有数词，后面通常要跟“of+名词”，构成“数词+percent+of+名词”结构，表示具体的百分数。本结构中的名词如果是单数，谓语动词就要用单数；如果是复数，谓语动词就要用复数。

Eighty percent of the earth is covered by water. 地球表面的80％被水覆盖着。

Twenty percent of the students are from the south. 20％的学生来自南方。

② percentage意为“百分率，百分数”，前面常有large，small，great，high，what等，但不可用数词修饰，后面常跟“of+名词”。有不定冠词或what时，句中谓语动词的单复数要根据of后的名词而定。

The percentage of the failures is very small. 不及格的百分率很低。

A small percentage of his income is spent in buying books. 他收入的一小部分用于买书。

A great percentage of the TV sets in the shop are made in China. 这家商店出售的电视机绝大部分是中国制造的。

What percentage of college students go abroad？大学生出国的百分率是多少？