More than one student has read the book.
Many a student has read the book.
这两句话的主语虽然意义上是复数,但形式是单数,所以主谓一致时与形式一种,谓语动词用单数形式.
如果是 More students than one have read the book.
句意虽然没变,但主语的形式变化了.故此,这种主谓一致也叫“形式一种”或称“语法一致；“区别于”语义一致“.