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

half的用法是 one and a half years 还是one and a half year?half具体的用法? A.one and a half year`sB.a year and a half`sC.one and a half yearD.a year and a half的区别和用法A.one and a half year`sB.a year and a half`sC.one and a half yearD.a year and a half one hour and a half是错的吗?老师说只能用an hour and a half,如果不行,是语法规定的还是习惯用法? 一天半 的英文是one and a half days还是one and half days 那1.5 是one and a half 还是one and half一天半可以译为one day and a half吗 one and a half half的用法.他最后的航行was more than half a century earlier（早半个多世纪） than哥伦布发现美洲大陆.一个半小时是an hour and a half /one and a half hours那么【half a century 】可不可以用【a half century】?这 half a sandwich,half hour,one and a half hour.这些half的用法都不相同,该怎么理解?half hour正确吗，应该用half an hour? 注意是：one and half 和 one and a half区别注意是：one and half 和 one and a half．他们有什么区别吗? 是one and a half hours还是one and a half hour 是one and a half hour 还是 one and a half hours 一个半小时 英语：是one and a half hour 还是 one and a half hours 一个半月的时间英文怎么说 是 one and a months' 还是 one and a half months是 one and half months' 还是one and a half months' 问题之前没检查，有点错误，呵呵 英语翻译是one and a half hours还是one and half an hours还是其他? one and a half hours 和 one hour and a half的意思一样吗 The W.H.O.says about two and one-half percent dietwo and one-half percent 是百分之几? one + 名词 + and a half one kilo and a half one and a half ticket