half an hour 和a half hour有什么区别?

half an hour 和a half hour有什么区别?
half an hour 和a half hour有什么区别?

half an hour 和a half hour有什么区别?
一个半小时的表达应该是：one hour and a half.
例：半小时：half an hour/a half hour
一小时：one hour 一个半小时：one hour and a half