half an hour和a half hour一样吗?

half an hour or a half hour? a half hour还是half an hour? half an hour 和a half hour有什么区别? a half of an hour an hour and half还是an hour and a half One and a half an hour 和An hour and a half 有什么不同 a half hour later\after half an hour\after half an hour late 是half hour还是half an hour? half hour =half an hour one and a half hours 和 an hour and a half 就是说 超过一个小时候 hour one and a half hours 和 one hour and a half的意思一样吗 half an hour,half hour,a half hour哪些对,那些错