当主语是分数或百分数时,谓语动词用什么形式?
当主语是分数或百分数时,谓语动词的单复数由of后面的名词决定。
About three-fourths of the surface of the earth_____covered by the sea.
这里的Surface是不可数名词,只能接单数动词is。例如of后接buildings,为可数名词,后面应接复数动词。
surface
英 [ˈsɜːfɪs] 美 [ˈsɜːrfɪs]
n.表面;表层;面;水面;地面。升到水面。
In contrast with its surface fleet, Britain's submarine force was relatively small.
同其水面舰队相比,英国的潜艇部队规模相对较小。
扩展资料:
表示分数时,分子须用基数词,分母须用序数词。当分子是1以上的任何数时,分母须用复数形式。
1/2: one half 或a half (不读为 one second)
1/3: one third 或 a third
2/3: two thirds
1/4: a quarter 或 one quarter
3/4: three quarters 或 three fourths
2/5: two fifths