half的用法是 one and a half years 还是one and a half year?half具体的用法?

问题描述:

half的用法
是 one and a half years 还是one and a half year?
half具体的用法?

应该是第一个one and a half years.half是一半的意思,单独用时为a half year

One and a half后面的名词用复数,谓语动词习惯用单数.