half an hour,half hour,a half hour哪些对,那些错

half an hour,half hour,a half hour哪些对,那些错
half an hour,half hour,a half hour哪些对,那些错

half an hour,half hour,a half hour哪些对,那些错
half an hour是对的
half hour本身不对,如果加一个破折号变成形容词half-hour也可以
a half hour语法没错,但习惯上几乎没有人这么用.

half an hour， a half hour这俩对 另个是错的

half an hour
a half hour
这两个是对的