是one year and a half还是a year and a half?为什么?

是one year and a half还是a year and a half?为什么? half的用法是 one and a half years 还是one and a half year?half具体的用法? one year and half 有这个词组吗?看清楚是one year and half而不是one year and a half one year and a half 后应该是接单数形式吧?比如one year and a half has passed.不是one and a half years 是one year and a half 一年半用英语怎么说?是one and a half years还是one and a half year? one year and a half和a year and a half哪个正确 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 year and a half 和 one and a half years thanks! one () and a half one and a half () years or year? one and a half 后加year 还是years They lived here about one year and a half改错 the baby is one and a half _____ (year)old My mother has been working in that clothing factory for___.A.one and a half year B.one year and half C.one and a half yearsD.a year and a half year one and a half 英语问题one and a half year’s time和one and a half years' time哪个正确 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? half a year 和a half years.和half year哪个正确..为什么还有1.one and a years 2.one and half year.3.one and half years.4one half and one year哪个对的．．也说明一下．好乱哦～.还有英语分数表达中间加不加连字符有 It will take them___to finish the course.A.one and a half year's timeB.a year and a halfC.a year and a half of timeD.a year and a half time原因.