half hour怎么读啊

half hour怎么读啊 half an hour怎么读 in half an hour怎么提问 half a sandwich,half hour,one and a half hour.这些half的用法都不相同,该怎么理解?half hour正确吗，应该用half an hour? a half hour还是half an hour? 是half hour还是half an hour? half an hour or a half hour? 是a half hours还是a half hour?a half后面是单数还是复数啊? half hour =half an hour half hour half an hour 的意思有和区别? half an hour later half an hour造句 half a hour Half an hour. a half hour对吗 I spend half an hour finishing doing homework怎么要用 finishing doing 啊,怎么解释啊 我话半小时多读英语.用英语怎么说是 花按 l spend ___ ___ half an hour ___ English. Tirty m____ is half an hour.应填什么啊? half an hour or hour中文