one and a half day /one and a half days这两个短语分别作主语,分别是单数还是复数?怎么看的?最近看语法看的都纠结死了.

改错 He stayed here one and a half day 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 a half 还是one and half一天半可以译为one day and a half吗 You spent one and a half( ),but i only took one half ( )A day ,day B days ,daysCdays ,dayDday ,days one + 名词 + and a half one kilo and a half one and a half ticket one and half还是one and a half I spend about one and a half hours doing my homework every day (同义句）（ ） （ ） （ ） one and a half hours （ ) ( ) my homwwork every day how often的答句可以是one and a half hours a day吗. 1.Lucy is ill.She has been away from school for ___.A.one day and half B.one and a half days C.one and half a day D.a half and one days2.Hurry up!time is ___.A.run out of B.running out of C.running out3.--It's very cold and windy today.--________.A.S one and a half hours 还是hour I have to do my homework for _______ every day.I have to do my homework for _______ every day.A.one and half hour B.one and a half hour C.one and half hours D.one and a half hours请在写出选项的基础上写出为什么选此选项! half的用法是 one and a half years 还是one and a half year?half具体的用法? one month and a half和one and a half month有区别吗?还有one hour and a half和one and half an hour哪个对? The meeting lasted for ( ).A.one and half a hour B.one and half hour C.one and a half hours D.one and the half hour one and one-half billion和one and a half billion那一句常用啊 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?