a half of month还是half a month

month and a half HALF A MONTH AWAY every half month与every half a month 哪个对 one and a half month还是months对? ----- were you there ?---Half a month. two and a half month(s),month后加不加s? two and a half month(s),month后加不加s half 和 half a month有什么区别？ one month and a half和one and a half month有区别吗? 英语翻译A month and a half later,Colin presented a pair of ticke 英语翻译必须有“my parents,be,london,half a month” 有one and half a month这种说法吗?