one and a half的用法

one and a half的用法 half的用法是 one and a half years 还是one and a half year?half具体的用 half a sandwich,half hour,one and a half hour.这些half的用法都不相同, one and a half hours 和 one hour and a half的意思一样吗 one and a half day /one and a half days one and a half apples one kilo and a half 关于one and a half one + 名词 + and a half 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