1．people，cattle等集体名词作主语时，谓语动词必须用复数形式，但family，class，team，group，public等集体名词作主语时，如果把它们作为一个整体看待，谓语动词应用单数形式；如果强调的是个体成员，谓语动词应用复数形式。
The flooded family is made up of ten people，so the clothing is badly needed.
遭受洪灾的家庭由十人组成，因此衣服十分紧缺。
2．如果主语由“more than one＋n.”或“many a＋n.”构成，谓语动词用单数形式；如果主语由“more＋复数名词＋than one”构成，谓语动词一般用复数形式。
More than one boy likes to play basketball while many a girl is good at playing baseball.
不止一个男孩喜欢打篮球然而不止一个女生善长打棒球。
