2 years and a half 与2 and a half years用法区别是什么?其中短语结构是什么?可以说成2 years and a half year吗?

2 years and a half 与2 and a half years用法区别是什么?其中短语结构是什么?可以说成2 years and a half year吗? three years and half a year two years and a half=two and a half years吗? half的用法是 one and a half years 还是one and a half year?half具体的用法? 1年半 用英语怎么说a year and a half?a years and a half?one and a half years?还是什么别的 麻烦2种都写下实在没分了 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 - years ago ,I came to the USA.Two and a half Two and half a Two a half Half and two —It’s said that a new factory is being built now.—Yeah.It will take _____.A.one and half years B.a half and a year C.a year and half D.one and a half years our teacher has been teaching in this school for( ) a.two year and a half b.two and a half year c.two years and a half d.two and a half years two years and a half 改为同义句— — — — years We have stayed at this school for _____.Which of the following choices is wrongA.two and a half years B.two years and half a yearC.two years and half a year D.both A and B These children have been studying English for _____. A.two years and a half B.two and a half year C.two and half year D.two and half years 一年半用英语怎么说?是one and a half years还是one and a half year? 英语问题one and a half year’s time和one and a half years' time哪个正确 two years and a half 还是two year and a halfyear后没有没有s啊? began to skate__ A for three and a half years B three and a half years ago.说明理由 for也不可以是用在一般过去时的吗?