half an hour 是单数还是复数

half an hour 是单数还是复数 one and a half hour看做单数还是复数?half an hour 是a half hours还是a half hour?a half后面是单数还是复数啊? 是half hour还是half an hour? To get there by bike will take us half an hour.里面的谓语动词是什么,是单数还是复数? half an hour 的主谓一致问题half an hour 作主语时,谓语动词应该用单数还是复数?one hour and a half 呢? an hour and a half 做主语时,谓语用复数还是单数 half是单数还是复数 half 是单数还是复数 one hour and a half 后面是复数谓语还是单数谓语 one hour and a half作主语谓语是单数还是复数?one and a half hours呢? half the food是复数还是单数 half of population是单数还是复数 half the books是单数还是复数 a half hour还是half an hour? one hour and a half 的谓语是单数还是复数,one and a half hours 的谓语是单数还是复数我们老师说第一个是复数,第二个是单数, an hour and half还是an hour and a half one apple and a half是复数还是单数?