Most people (including me) would say a half in conversationfollowing the rule for consonants but i am pretty sure it's in fact proper english to use an for h words. Half a year ：正确。在一年的前面加上half就是半年了，当然对的。 one and half years. 我这么做只花了一个半小时。 one and a half hours is enough for me.
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One and a half hours 和one hour and a half没有区别，都是一个半月的意思。 例句： i spent only one and a half hours.
A half hour和half an hour含义一样，都是指0.5小时。区别如下： 一、英语和美语表达不同 1、a half hour ，是美语表达。 2、half an hour 英语表达。 二、冠词不同 1、a half hour冠词为a，.
