一年半用英语怎么说?是one and a half years还是one and a half year?

一年半用英语怎么说?是one and a half years还是one and a half year? half的用法是 one and a half years 还是one and a half year?half具体的用 1年半 用英语怎么说a year and a half?a years and a half?one and a hal one and a half years 谓语动词用单数还是复数?one year and a 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 one and a half () years or year? 一个半小时 英语：是one and a half hour 还是 one and a half hours 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 一个半小时英文怎么说到底是one and a half hour还是one and a half hours 哪个正确,