一半究竟是用one half 还是half one表达?

一半究竟是用one half 还是half one表达? 英语里“一半”究竟是用one half 还是 half one表达? 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具体的用法? 英语翻译是one and a half hours还是one and half an hours还是其他? 是one and a half hours还是one and a half hour 是one and half hours还是one and half hour?RTRT! 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 apple and a half是复数还是单数? one-half inch 是一个半英尺还是半英尺 one cake and a half 谓语是单数还是复数 是one year and a half还是a year and a half?为什么? one and half还是one and a half one hour and a half作主语谓语是单数还是复数?one and a half hours呢? 1,500,000（150万） 是one and half million还是one and a half million an apple and a half以及one and a half apple和half an apple分别用is还是are?