more than one 意思是：不止一个
more than one 作主语时，谓语动词通常用单数（要从形式一致来考虑）
如：More than one student has seen the play.
Many a boy has bought that kind of toy.
more than one +单数名词 作主语时，谓语动词用单数
more +复数名词+than one 作主语时，谓语动词用复数
拓展资料：
more than 的用法
1. more than后面跟名词，意为“不只是，不仅仅是”。例如：
（1）Hibernation is more than sleep. 冬眠不只是睡觉。
（2）Kate was more than a teacher. She also did what she could to take care of her pupils.
凯特不仅仅是位教师，她还尽其所能照顾她的学生。
2. more than与数词连用，意思是“多于，大于，超过”。例如：
（1）I have known him for more than twenty years. 我认识他已超过二十年了。
（2）More than ten policemen turned up at the spot where the accident happened. 十多位警察出现在出事地点。
3. more than与形容词和分词连用，表示“非常、十分”。例如：
（1）They were more than happy to see us come back from the expedition. 看到我们远征而归，他们异常高兴。
（2）I was more than surprised to see the lion standing at the body. 看到那头狮子站在尸体旁边，我非常惊讶。
4. more than与动词连用，对动词起着加强语气的作用。例如：
（1）Repeated advertising will more than increase product sales. 多次做广告意味着增加产品的销售。
（2）His progress in English learning more than encouraged him to learn the subject well. 在英语学习方面的进步激励他学好这门课程。
参考资料：百度百科-主谓一致 百度百科-more than