a one -hour还是an one-hour

a one -hour还是an one-hour 冠词 an one-hour 还是a one-hour 是a one-hour ducumentary还是an one-hour documentary an hour nad a half 还是one hour nad a half one and a half hour看做单数还是复数?half an hour 是less than an hour还是less than one hour? one and a half hours 还是hour 是an one还是a one 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? half an hour?half an hour、an hour and a half 、 one and a half hours和one half hour都能表示一个半小时吗? One and a half an hour 和An hour and a half 有什么不同 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? a half hour one hour对不对? “一个半小时”可不可以说成one and half an hour?可以说one and a half hour 或one hour and a half,那可不可以说one and half an hour呢?为什么？ 56.The film will last for______A.an hour and a half B.an hour and half C.one and a half hour D.one hours and a half one前是用a还是an,如：such a one 还是 such an one. one hour and a half加’s 还是s’ one hour and a half是错的吗?老师说只能用an hour and a half,如果不行,是语法规定的还是习惯用法?