动词一致性的其他问题
1.书名, 国家名用单数:
tales from shakespeare is a book by charles lamb.
2. 学科名, 如mathematics, economics用单数.
3. many a 或more than one 所修饰的词作主语时, 谓语动词多用单数形式:
many a person has had that kind of experience.
more than one person has involved in the case.
a number of 后接复数, the number of后接单数:
a number of books have been published on the subject.
the number of books published on the subject is simply amazing.
4. one of those 后用单数. 在“one of + 复数名词 +关系分句”结构中，关系分句中谓语动词的单复数形式在一般情况下有两形式，一是根据先行词采用复数形式：
joan is one of those people who go out of their way to be helpful.
当one 之前友the only 等限定词和修饰语时，关系分句谓语动词根据one 而定，即采用单数形式：
he is the only one of those boys who is willing to take on another assignment.