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

half的用法是 one and a half years 还是one and a half year?half具体的用 一年半用英语怎么说?是one and a half years还是one and a half year? one and a half的用法 one and a half 后加year 还是years 是one year and a half还是a year and a half?为什么? one and a half years 谓语动词用单数还是复数?one year and a half a sandwich,half hour,one and a half hour.这些half的用法都不相同, one () and a half one and a half () years or year? one and half还是one and a half one and half 还是 one and a half 一天半 的英文是one and a half days还是one and half days 那1.5 是one and 1年半 用英语怎么说a year and a half?a years and a half?one and a hal