所谓就近是指句子的主语结构很复杂时,如何判断句子谓语的数的问题.就近原则:there/here+be/系动词,either...or...,neither...nor...,not only...but(also)...,not...but...,分数/百分数修饰名词（population类外）,表许多的名词（除了quantity）如：Not only you but also I am right.不仅你是对的，我也是对的。

2/3 of the earth is covered by water.地球的2/3都被水覆盖。Many a student in our school has never been abroad.我们学校有很多学生从没出过国。